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Magnesium Glycinate: Benefits, Dosage, Side Effects & Uses
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Magnesium Glycinate: Benefits, Dosage, Side Effects & Uses
๐ฌ What Is Magnesium Glycinate?
Quick Answer
Magnesium glycinate is a chelated mineral supplement in which magnesium is bonded to the amino acid glycine. It is the most bioavailable and best-tolerated oral form of magnesium โ particularly effective for sleep improvement, anxiety relief, muscle cramp prevention, and blood pressure support. Unlike magnesium oxide, it rarely causes diarrhoea.
Magnesium is the fourth most abundant mineral in the human body and a cofactor in over 300 enzymatic reactions.[1] Despite its importance, magnesium deficiency is extremely common โ estimated to affect up to 48% of Americans and is likely equally prevalent across sub-Saharan Africa, where dietary patterns are increasingly low in magnesium-rich whole foods.[2]
The "glycinate" in magnesium glycinate refers to glycine โ a calming amino acid that also acts as an inhibitory neurotransmitter. This dual action means magnesium glycinate delivers the mineral benefits of magnesium and the calming properties of glycine, making it particularly powerful for sleep and anxiety.
๐ Supplement Identity Card โ Magnesium Glycinate
Supplement Type
Essential Mineral (Chelated)
Chemical Form
Magnesium bis-glycinate / Magnesium Lysinate Glycinate Chelate
RDA (Adults)
310โ420mg/day (elemental Mg)
Tolerable Upper Limit (UL)
350mg/day from supplements (NIH)
Deficiency Condition
Hypomagnesaemia
Pregnancy Safety
Generally safe at RDA โ consult doctor before supplementing
Available Forms & Brands by Country
๐ณ๐ฌ Nigeria
Magnesium glycinate is not widely stocked in Nigerian retail pharmacies. Most local pharmacies carry magnesium oxide (low bioavailability) or magnesium chloride. The glycinate chelate form is best sourced through Enavec Pharmacy via iHerb international shipping. Doctor's Best High Absorption Magnesium is the recommended brand.
๐ฌ๐ง United Kingdom
Solgar Chelated Magnesium ยท BetterYou Magnesium Oil (transdermal) ยท Pure Encapsulations Magnesium Glycinate ยท Available at Holland & Barrett, Boots, and Amazon UK. Not routinely prescribed on NHS โ purchased OTC.
๐บ๐ธ United States
Doctor's Best High Absorption Magnesium (best-seller) ยท Natural Vitality Calm Magnesium Glycinate ยท Thorne Magnesium Bisglycinate ยท Pure Encapsulations ยท KAL Magnesium Glycinate 400 ยท All available on iHerb, Amazon USA, and iHerb.com.
๐จ๐ฆ Canada
Natural Calm Canada ยท Organika Magnesium Glycinate ยท Jamieson Magnesium Bisglycinate ยท Available at Shoppers Drug Mart, Well.ca, and iHerb Canada. Health Canada NPN: most brands registered as NPN 80071386.
โ๏ธ How Does Magnesium Glycinate Work in the Body?
Magnesium functions primarily as a cofactor โ it activates enzymes and facilitates chemical reactions that would otherwise not occur. At a cellular level, it regulates ion channels, stabilises ATP (the body's energy currency), and acts as a natural calcium antagonist โ preventing calcium from over-stimulating nerve and muscle cells.
The glycinate chelate form is absorbed in the small intestine via a peptide transport mechanism, bypassing the carrier proteins that magnesium oxide competes for. This explains why magnesium glycinate achieves higher blood levels per gram than any other oral magnesium salt.
Glycine itself acts on GABA-A receptors in the brain โ the same receptors targeted by benzodiazepine sedatives. This contributes directly to magnesium glycinate's calming and sleep-promoting effects, making it uniquely effective compared to other magnesium forms.
1
Intestinal Absorption
Magnesium glycinate is absorbed in the small intestine via peptide transporters (PepT1/PepT2) โ a high-capacity pathway that does not become saturated at therapeutic doses, unlike the ion channels used by magnesium oxide.
2
Intracellular Activation
Once absorbed, magnesium enters cells and activates ATP-dependent enzymes, stabilises DNA and RNA structure, and regulates sodium-potassium pump function โ essential for all electrical activity in nerve and muscle cells.
3
Calcium Channel Regulation
Magnesium acts as a physiological calcium antagonist โ blocking NMDA receptors and voltage-gated calcium channels when cells are at rest. This prevents over-excitation of neurons and muscle fibres, directly reducing anxiety, cramps, and irregular heartbeats.
4
Glycine's CNS Action
The glycine released after absorption activates inhibitory GABA-A receptors in the brain and promotes melatonin synthesis by lowering core body temperature. This is why magnesium glycinate promotes sleep onset more powerfully than other magnesium forms.
"Magnesium deficiency is associated with increased excitability of nerve and muscle cells, explaining the wide range of symptoms โ from muscle cramps and anxiety to irregular heart rhythm and insomnia."
โ NIH Office of Dietary Supplements, Magnesium Fact Sheet for Health Professionals, 2024
๐ฉบ Magnesium Glycinate Health Benefits & Evidence
Summary of Evidence
Magnesium glycinate has strong clinical evidence for improving sleep quality, reducing muscle cramps, and lowering blood pressure in deficient individuals. Evidence for anxiety reduction and migraine prevention is moderate but growing. Emerging research supports benefits for blood sugar regulation, depression, and bone density. No disease treatment claims are made here.
3.3M
Monthly Google searches for magnesium supplements globally
Spate / Nutraingredients, 2024
48%
Of Americans estimated to have inadequate magnesium intake
NIH ODS / NHANES data, 2023
+33.6%
Year-on-year growth in magnesium glycinate searches, 2024โ2025
Spate Supplement Trends Report, 2025
Strong Evidence ๐ข
Sleep Quality Improvement
๐ข Strong Evidence
Magnesium regulates melatonin production and activates the GABA system โ both critical for sleep onset and maintenance. A 2021 systematic review in BMC Complementary Medicine of 3 RCTs found magnesium supplementation significantly improved sleep efficiency, sleep time, and early morning awakening in older adults.[3] The glycine component further reduces core body temperature, a proven trigger for sleep onset.
Muscle Cramp Relief
๐ข Strong Evidence
Magnesium is the natural physiological antagonist to calcium in muscle contraction. Low magnesium causes sustained muscle contraction โ resulting in cramps, spasms, and restless legs. A Cochrane review confirms magnesium reduces pregnancy-related leg cramps.[4] Athletes and Nigerians performing physically demanding work are particularly likely to benefit from supplementation.
Blood Pressure Support
๐ข Strong Evidence
A 2016 meta-analysis of 34 clinical trials in Hypertension found magnesium supplementation (average 368mg/day) significantly reduced both systolic and diastolic blood pressure, with greater effects in deficient individuals.[5] This is directly relevant for Nigeria where hypertension affects an estimated 38.1% of adults (WHO, 2023).
Moderate Evidence ๐ก
Anxiety & Stress Reduction
๐ก Moderate Evidence
A 2017 systematic review of 18 studies in Nutrients found magnesium supplementation was associated with reduced subjective anxiety, particularly in individuals with mild-to-moderate anxiety and existing magnesium deficiency.[6] The glycine component specifically enhances this effect by acting on GABA-A receptors.
Migraine Prevention
๐ก Moderate Evidence
Multiple RCTs and the American Headache Society support magnesium as a preventive treatment for migraines. Magnesium deficiency is found in up to 50% of migraine sufferers. A 2021 review in Nutrients found oral magnesium at 400โ600mg/day reduced migraine frequency by approximately 40% over 12 weeks.[7]
Blood Sugar Regulation
๐ก Moderate Evidence
Magnesium is a cofactor for insulin receptor signalling. Low magnesium is associated with insulin resistance and type 2 diabetes risk. A 2011 meta-analysis of 13 prospective studies found that each 100mg/day increase in magnesium intake reduced diabetes risk by approximately 15%.[8]
Emerging Evidence ๐ต
Depression Support
๐ต Emerging
A 2017 open-label RCT in PLOS ONE found magnesium chloride 248mg/day significantly reduced PHQ-9 depression scores within 2 weeks in adults with mild-to-moderate depression.[9] The glycine in magnesium glycinate may amplify this effect, though dedicated glycinate trials are limited.
Bone Density
๐ต Emerging
Approximately 60% of the body's magnesium is stored in bone. Population studies consistently link higher magnesium intake with greater bone mineral density. Supplementation trials specifically for bone density are limited but supportive, particularly for postmenopausal women.
๐ Magnesium Deficiency Rates by Population Group
Estimated percentage with inadequate magnesium intake. Source: NIH ODS, NHANES 2015โ2018; WHO Global Nutrition Report 2023.
% with inadequate intake
Adequate intake
๐ Source: NIH Office of Dietary Supplements, Magnesium Fact Sheet 2024; WHO Global Nutrition Report 2023; Rosanoff et al., Nutrition Reviews 2012.
๐ Global Magnesium Supplement Search Volume Trend (2019โ2024)
Monthly Google searches in millions globally. Magnesium is now the world's most searched supplement. Source: Spate 2024 Supplement Trends Report; Google Trends.
Magnesium (all forms)
Magnesium glycinate (specific)
๐ Source: Spate 2024 Supplement Trends Report; Nutraingredients 2024; Google Trends global data.
๐ Magnesium Glycinate โ Evidence Strength by Benefit Area
Evidence score (0โ10) based on number of RCTs, systematic reviews, and effect sizes. Source: Cochrane Library; PubMed meta-analyses; Examine.com Research Digest 2024.
Strong (7โ10)
Moderate (4โ6)
Emerging (1โ3)
๐ Source: Cochrane Library; PubMed; Examine.com Research Digest 2024; NIH ODS Magnesium Fact Sheet 2024.
๐ Magnesium Glycinate Dosage & How to Take It
Quick Dosage Answer
The standard adult dose of magnesium glycinate is 200โ400mg of elemental magnesium per day, taken with dinner or 1 hour before bed. Note that magnesium glycinate is approximately 14% elemental magnesium by weight โ so a 500mg tablet typically contains ~70mg of elemental magnesium. Always check the label for elemental magnesium content, not total tablet weight.
| Purpose | Daily Dose (Elemental Mg) | Timing | Form | Notes | Source |
|---|---|---|---|---|---|
| General deficiency / maintenance | 200โ400mg | With dinner or before bed | Glycinate chelate | Most tolerated form โ rarely causes loose stools | NIH ODS, 2024 |
| Sleep improvement | 200โ350mg | 1 hour before bedtime | Glycinate (preferred) | Glycine component enhances sleep onset; take consistently for 2โ4 weeks | BMC Complement Med, 2021 |
| Anxiety reduction | 300โ400mg | Morning or split doses | Glycinate or malate | GABA-A receptor mechanism; pair with magnesium-rich diet | Nutrients, 2017 |
| Muscle cramps | 300โ400mg | Evening, with food | Glycinate or citrate | Allow 2โ4 weeks for full effect; increase fluid intake | Cochrane Review, 2020 |
| Blood pressure support | 300โ400mg | Any time, with food | Glycinate or taurate | Best combined with low-sodium diet; monitor BP regularly | Hypertension, 2016 |
| Migraine prevention | 400โ600mg | Split doses morning/evening | Glycinate or oxide | Allow 8โ12 weeks for migraine prevention trials | Nutrients, 2021 |
| Children (6โ12 years) | 130โ240mg | With food | Glycinate liquid/powder | Consult paediatrician first; not for under-6 without medical advice | NIH ODS, 2024 |
| Pregnant women | 350โ360mg (total from all sources) | With food | Only under medical supervision | Supplement only if directed by doctor; food sources preferred | WHO / NICE, 2024 |
| Older adults (65+) | Start at 100โ200mg, increase slowly | With dinner | Glycinate preferred | Renal function often reduced โ check with pharmacist; higher deficiency risk | NIH ODS, 2024 |
Absorption Tips
๐ก Pharmacist Tips for Maximum Absorption:
Take magnesium glycinate with food to reduce the small risk of nausea. Avoid taking alongside zinc supplements in the same dose โ both compete for absorption. Vitamin D and vitamin B6 enhance magnesium absorption. Avoid taking with calcium supplements as they compete for uptake.
๐ณ๐ฌ Nigerian Dispensing Note
Availability in Nigeria:
Magnesium glycinate chelate is not routinely stocked at Nigerian pharmacy chains (Healthplus, MedPlus, Alpha Pharmacy). Most Nigerian pharmacies stock magnesium oxide or magnesium chloride, both of which have significantly lower bioavailability and higher rates of digestive upset. Enavec Pharmacy sources magnesium glycinate via iHerb, which ships internationally to Nigeria. Doctor's Best High Absorption Magnesium (100mg elemental per tablet, as lysinate glycinate chelate TRAACSยฎ certified) is the recommended brand โ allow 7โ14 days for shipping.
๐ Magnesium Glycinate Side Effects & Safety
Safety Summary
Magnesium glycinate is one of the safest and best-tolerated oral supplements available. Unlike magnesium oxide or citrate, it rarely causes diarrhoea at therapeutic doses. Serious adverse effects are extremely rare and almost exclusively occur with kidney disease or mega-doses. At the recommended 200โ400mg/day, it is considered safe for most healthy adults.
๐ก Common (mild, dose-dependent)
- Loose stools or mild diarrhoea at doses above 400mg elemental magnesium
- Nausea if taken on an empty stomach
- Mild abdominal cramping at high doses
- Drowsiness (due to glycine's CNS effects โ take at night if this occurs)
๐ด Serious (rare โ primarily with kidney disease)
- Hypermagnesaemia (excess magnesium) โ nausea, vomiting, low blood pressure
- Cardiac arrhythmia at very high doses (>5,000mg elemental/day)
- Respiratory depression โ only at extremely toxic levels
- Risk is essentially zero in adults with normal kidney function at standard doses
๐ต Rare / Idiosyncratic
- Allergic skin reactions โ very rare; usually to excipients not magnesium itself
- Muscle weakness at very high doses
- Headache โ rarely reported in clinical trials
- Taste changes โ occasional with chelated forms
๐ข Signs You Are Deficient (not side effects)
- Muscle cramps and twitches (especially at night)
- Difficulty sleeping and night-time waking
- Anxiety, irritability, and low mood
- Fatigue and low energy
- Constipation, irregular heartbeat
- Numbness or tingling in extremities
โ ๏ธ Quality & Contamination Risk:
The supplement industry is poorly regulated in Nigeria. Counterfeit or substandard magnesium products โ including those labelled "glycinate" but actually containing magnesium oxide โ are documented on the Nigerian market. Always purchase from verified sources. Look for third-party tested brands (NSF International, Informed Sport, USP Verified). Doctor's Best and Thorne both hold third-party certification.
โก Magnesium Glycinate Drug Interactions
๐ด Significant
Antibiotics โ Tetracyclines & Fluoroquinolones
Magnesium forms insoluble chelates with tetracycline (doxycycline) and fluoroquinolone antibiotics (ciprofloxacin, levofloxacin), dramatically reducing antibiotic absorption. Separate doses by at least 2 hours before or 4โ6 hours after. This is critical and frequently missed in Nigerian clinical practice.[10]
๐ด Significant
Bisphosphonates (Alendronate, Risedronate)
Magnesium significantly reduces absorption of bisphosphonates used for osteoporosis. Bisphosphonates must be taken on an empty stomach with water only. Separate magnesium by at least 2 hours.[11]
๐ก Moderate
Diuretics โ Thiazides & Loop Diuretics
Hydrochlorothiazide and furosemide increase urinary magnesium excretion, worsening deficiency. Paradoxically, this means patients on these common Nigerian antihypertensive agents have higher magnesium requirements and often benefit most from supplementation. Monitor magnesium levels regularly.[12]
๐ก Moderate
Proton Pump Inhibitors (Omeprazole, Lansoprazole)
Long-term PPI use (more than 1 year) is associated with hypomagnesaemia by reducing intestinal magnesium absorption. Patients on long-term PPIs โ common for acid reflux in Nigeria โ should have magnesium levels monitored and may need supplementation.[13]
๐ก Moderate
Metformin (Diabetes medication)
Metformin may reduce magnesium absorption over time. Given that magnesium deficiency is itself a risk factor for insulin resistance, patients on metformin should consider routine magnesium monitoring. Supplementation may enhance metformin's glycaemic effects.[8]
๐ข Mild
Calcium Supplements
High-dose calcium supplementation (above 1,000mg/day) may reduce magnesium absorption when taken simultaneously. Take calcium and magnesium supplements at different times of day โ calcium in the morning, magnesium in the evening.
๐ข Mild
Zinc Supplements
Supplemental zinc (above 142mg/day) can reduce magnesium absorption by competing for intestinal transport proteins. At standard zinc supplement doses (10โ25mg), this interaction is minimal. Avoid taking both simultaneously in large doses.
๐ซ Contraindications & Warnings
Absolute Contraindications:
Do NOT take magnesium glycinate supplements if you have: severe kidney disease (eGFR below 30) or end-stage renal disease requiring dialysis. The kidneys are the primary route for magnesium excretion โ impaired kidneys cannot clear excess magnesium, risking life-threatening hypermagnesaemia. This is an absolute contraindication.[14]
Populations Requiring Extra Caution
Kidney Disease (any stage): Always consult a nephrologist or pharmacist before supplementing. Even mild renal impairment reduces magnesium clearance. Start at the lowest effective dose and monitor serum magnesium levels.
Heart Block or Cardiac Arrhythmia: Magnesium has cardiac effects. Patients with AV block or those on antiarrhythmic drugs should only supplement under medical supervision.
Myasthenia Gravis: Magnesium can potentiate neuromuscular blockade and worsen muscle weakness. Avoid high-dose supplementation without specialist advice.
Children under 6 years: Do not give magnesium supplements to young children without paediatric guidance.
๐ณ๐ฌ Nigerian Counterfeit Risk
โ ๏ธ Counterfeit Supplement Warning:
NAFDAC has flagged counterfeit and substandard supplements on the Nigerian market. Products labelled "magnesium glycinate" have been found to contain magnesium oxide or no magnesium at all. Purchase only from verified sources โ Enavec Pharmacy (iHerb-sourced), licensed importers, or directly from manufacturers. Demand third-party test certificates for any locally sourced supplement. Report suspected counterfeits to NAFDAC on 0800-162-3322.
โ๏ธ Magnesium Forms Compared โ Which Is Best?
Not all magnesium supplements are equal. The form determines how much magnesium is actually absorbed, how well it is tolerated, and which conditions it best addresses.
| Form | Glycinate โญ Best Evidence | Citrate | Oxide | Malate | Threonate |
|---|---|---|---|---|---|
| Bioavailability | High (80%+) | Good (25โ35%) | Poor (4%) | Good (30%) | Moderate |
| Digestive tolerance | Excellent โ rarely causes loose stools | Moderate โ laxative at high doses | Poor โ commonly causes diarrhoea | Good | Good |
| Best for sleep | โ Yes โ glycine enhances sleep | Partial | No | No | No |
| Best for anxiety | โ Yes โ GABA-A activity | Partial | No | No | No |
| Best for muscle cramps | โ Yes | โ Yes | Partial | โ Yes | No |
| Best for brain/cognition | Partial | No | No | No | โ Yes (crosses BBB) |
| Nigerian availability | Via iHerb / Enavec Pharmacy | Limited โ local brands | Widely available locally | Via iHerb only | Via iHerb only |
| Cost (relative) | Moderate | LowโModerate | Very Low | Moderate | High |
โ
Pharmacist Recommendation:
For most adults โ especially those seeking benefits for sleep, anxiety, muscle cramps, or blood pressure โ magnesium glycinate is the recommended first-choice form. It combines the highest bioavailability, best tolerability, and the added calming benefits of glycine. Only consider magnesium threonate if your primary goal is cognitive function or brain health specifically.
๐ฟ Top Food Sources of Magnesium โ Nigerian Foods Prioritised
Food sources of magnesium should always be the first approach. Nigerian cuisine contains many naturally magnesium-rich foods โ though food processing, cooking in large volumes of water, and modern refined diets reduce intake significantly.
| Food | Serving | Magnesium (mg) | % Adult RDA | Notes |
|---|---|---|---|---|
| Pumpkin leaves (Ugu) | 1 cup cooked | 157mg | 37โ50% | One of the richest dietary sources available in Nigeria |
| Bush mango seeds (Ogiri/Ogbono) | 30g | 120mg | 29โ38% | Used in soups; excellent source |
| Black-eyed beans (Ewa Agoyin) | 1 cup cooked | 91mg | 22โ29% | Very common in Nigerian diet; affordable |
| Pumpkin seeds (pepitas) | 28g (1oz) | 168mg | 40โ54% | Highest concentration per gram of any food |
| Dark chocolate (70โ85% cocoa) | 28g | 64mg | 15โ21% | Pleasurable way to supplement |
| Tiger nuts (Ofio) | 30g | 78mg | 19โ25% | Widely available in Nigerian markets |
| Almonds | 28g (1oz) | 80mg | 19โ26% | Also rich in vitamin E |
| Soyabeans (tofu or boiled) | 1 cup | 148mg | 35โ47% | Available in Nigerian markets |
| Spinach (cooked) | 1 cup | 157mg | 37โ50% | Also rich in iron and folate |
| Groundnuts (Peanuts) | 28g roasted | 48mg | 11โ15% | Extremely common in Nigeria โ daily snack |
๐ณ๐ฌ Nigerian Context:
Traditional Nigerian cooking methods โ boiling in large volumes of water and discarding cooking water โ reduce mineral content significantly. Up to 50% of magnesium in vegetables can be lost in cooking water. Steaming or using cooking water in soups retains more magnesium. Despite magnesium-rich traditional ingredients, urbanisation and increased consumption of processed foods has reduced average Nigerian magnesium intake.
โ Frequently Asked Questions About Magnesium Glycinate
Magnesium glycinate is best known for improving sleep quality, reducing anxiety and stress, relieving muscle cramps and restless legs, supporting healthy blood pressure, and preventing migraines. The combination of magnesium and glycine gives it advantages over other magnesium forms โ glycine independently calms the nervous system by acting on GABA receptors, making this form uniquely effective for sleep and anxiety. It is also one of the best-tolerated forms with minimal digestive side effects.
Most people notice improved sleep quality within 1โ2 weeks of consistent nightly use. Some report feeling calmer and falling asleep faster within the first 3โ5 days. Full effects on sleep architecture โ more deep sleep, fewer night wakings โ typically develop over 2โ4 weeks. Take 200โ350mg elemental magnesium 1 hour before bed for best results. Consistency is more important than timing.
Magnesium glycinate chelate is not widely available in Nigerian retail pharmacies. Most local pharmacies stock magnesium oxide (poor bioavailability) or magnesium chloride. Enavec Pharmacy sources genuine, third-party tested magnesium glycinate via iHerb international shipping to Nigeria โ typically 7โ14 days delivery. Doctor's Best High Absorption Magnesium is the recommended brand. Contact our pharmacists via WhatsApp to place an order.
Magnesium glycinate is bonded to glycine (an amino acid) and has higher bioavailability, better digestive tolerance, and additional calming effects from glycine. It is the best choice for sleep, anxiety, and general deficiency. Magnesium citrate is bonded to citric acid โ moderately bioavailable, often has a mild laxative effect, and is better for constipation relief. If your stomach is sensitive, glycinate is the superior choice. If you also need help with constipation, citrate may be preferable.
Magnesium can lower blood pressure modestly, so if you are already on antihypertensive medication, taking magnesium may have an additive effect โ potentially lowering your blood pressure further. This is usually beneficial but requires monitoring. Diuretics like hydrochlorothiazide actually increase magnesium excretion, meaning patients on these drugs often need magnesium supplementation. Inform your doctor or pharmacist and monitor your blood pressure regularly when starting supplementation.
Magnesium glycinate is the least likely form of magnesium to cause diarrhoea. Unlike magnesium oxide or magnesium sulfate (Epsom salt), the chelated glycinate form is absorbed via peptide transporters rather than osmotic mechanisms, meaning very little reaches the colon to draw in water. At doses above 400mg elemental magnesium, some people notice loose stools โ reducing the dose or splitting it into morning and evening doses usually resolves this.
For sleep and anxiety: take 1 hour before bedtime. For general deficiency and blood pressure: take with dinner. For muscle cramps: evening with food. For migraine prevention: split doses morning and evening. Magnesium can cause mild drowsiness due to glycine's CNS effects โ this is why most people find it easiest to take in the evening. If drowsiness is unwanted, switch to morning dosing.
Yes โ this is a clinically important interaction very relevant in Nigeria. Magnesium forms insoluble chelates with doxycycline (and all tetracycline antibiotics), reducing the antibiotic's absorption by up to 90%. Never take magnesium within 2 hours of a tetracycline antibiotic. Take your antibiotic at least 2 hours before or 4โ6 hours after magnesium glycinate. The same applies to ciprofloxacin and other fluoroquinolones commonly used in Nigeria for infections.
๐ Best Magnesium Glycinate Supplements on iHerb
All products below are in the magnesium glycinate chelate or bisglycinate form โ the best-evidence form for sleep, anxiety, and general deficiency. Verify URLs before purchase. Affiliate links support Enavec Pharmacy at no extra cost to you.
Pharmacist-curated picks
๐ Best Magnesium Glycinate on iHerb
All products ship to Nigeria. Chelate or bisglycinate form only โ the best-evidence form for sleep, anxiety, and general deficiency.
โ Ships to Nigeria
Third-party tested
Glycinate form only
No commission bias
1
Best
โ
Doctor's Best High Absorption Magnesium Lysinate Glycinate Chelate
Top pick
Doctor's Best ยท 120 tablets 100mg elemental / tablet
The most reviewed magnesium glycinate supplement globally. Uses TRAACSยฎ Albion chelate โ the only form with clinical validation of its specific chelation. Each tablet provides 100mg elemental magnesium. Take 2โ4 tablets daily. Third-party tested (NSF). Best-seller on iHerb for sleep and anxiety.
2
Runner
Thorne Magnesium Bisglycinate Powder
Thorne Research ยท 6.5oz powder 200mg elemental / scoop
Thorne is one of the most trusted supplement brands globally, with pharmaceutical-grade quality standards. The powder form dissolves in water โ ideal for those who dislike tablets. Unflavoured; can be mixed into any drink. Excellent for sleep and anxiety.
3
Premium
Pure Encapsulations Magnesium Glycinate
Pure Encapsulations ยท 90 capsules 120mg elemental / capsule
A hypoallergenic, premium brand recommended by functional medicine practitioners. Free from artificial additives, fillers, and common allergens. Each capsule provides 120mg elemental magnesium as glycinate chelate. Ideal for those with multiple food sensitivities. Trusted brand used in clinical practices across the USA and UK.
โ More options โ
4
Value
KAL Magnesium Glycinate 400
KAL ยท 90 tablets 400mg elemental / 2 tablets
High-potency option delivering a full 400mg elemental magnesium per 2-tablet serving โ the maximum effective dose for sleep and anxiety in most adults. Good value for money with solid quality control. Not recommended for those with any kidney concerns at this dose.
5
Easy
Qunol, Magnesium Glycinate Gummies, Mixed Berry, 90 Gummies
Qunol, Magnesium Glycinate ยท 90 gummies ยท Raspberry Lemon 60mg / 2 gummies
The most popular gummy magnesium supplement. Ideal for those who dislike tablets or capsules, and for building a daily habit. Raspberry lemon flavour. Each serving (2 gummies) provides 60mg elemental magnesium โ take 2 servings for a full 120mg dose.
โ ๏ธ Affiliate Disclosure:
This page contains affiliate links to iHerb products. Enavec Pharmacy earns a commission on purchases made through these links at no extra cost to you. All product selections are based on clinical evidence and quality โ not commission rates.
๐ Have Questions About Magnesium Glycinate?
Our PCN-licensed pharmacists can help you choose the right form and dose for your specific needs โ sleep, anxiety, blood pressure, or muscle cramps. Chat with us free on WhatsApp.
Medical Disclaimer: This article is for informational and educational purposes only and does not constitute medical advice. Statements regarding magnesium glycinate have not been evaluated by NAFDAC or the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Always consult a licensed pharmacist or physician before starting any supplement, especially if you have kidney disease, heart conditions, or are taking prescription medications. Do not exceed the recommended dose. Keep supplements out of reach of children. Emergency contacts: Nigeria NAFDAC Hotline: 0800-162-3322 ยท Nigeria PCN: pcn.gov.ng ยท UK NHS 111 ยท USA NIH ODS: ods.od.nih.gov.
๐ References
- NIH Office of Dietary Supplements. (2024). Magnesium โ Fact Sheet for Health Professionals. ods.od.nih.gov
- Rosanoff A, Weaver CM, Rude RK. (2012). Suboptimal magnesium status in the United States: are the health consequences underestimated? Nutrition Reviews, 70(3), 153โ164. pmc.ncbi.nlm.nih.gov
- Abbasi B, et al. (2021). The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. Journal of Research in Medical Sciences. pmc.ncbi.nlm.nih.gov
- Garrison SR, et al. (2020). Magnesium for skeletal muscle cramps. Cochrane Database of Systematic Reviews. cochranelibrary.com
- Zhang X, et al. (2016). Effects of Magnesium Supplementation on Blood Pressure: A Meta-Analysis of Randomized Double-Blind Placebo-Controlled Trials. Hypertension, 68(2), 324โ333. ahajournals.org
- Boyle NB, et al. (2017). The Effects of Magnesium Supplementation on Subjective Anxiety and Stress โ A Systematic Review. Nutrients, 9(5), 429. pmc.ncbi.nlm.nih.gov
- Chiu HY, et al. (2021). Effects of Magnesium Supplementation on Blood Pressure, Migraine, and Anxiety. Nutrients, 13(2), 562. pmc.ncbi.nlm.nih.gov
- Dong JY, et al. (2011). Magnesium intake and risk of type 2 diabetes: meta-analysis of prospective cohort studies. Diabetes Care, 34(9), 2116โ2122. pmc.ncbi.nlm.nih.gov
- Tarleton EK, et al. (2017). Role of magnesium supplementation in the treatment of depression: A randomized clinical trial. PLOS ONE, 12(6), e0180067. journals.plos.org
- Neuvonen PJ. (1976). Interactions with the absorption of tetracyclines. Drugs, 11(1), 45โ54. pubmed.ncbi.nlm.nih.gov
- Gertz BJ, et al. (1995). Studies of the oral bioavailability of alendronate. Clinical Pharmacology & Therapeutics, 58(3), 288โ298. pubmed.ncbi.nlm.nih.gov
- Quamme GA. (1997). Renal magnesium handling: new insights in understanding old problems. Kidney International, 52(5), 1180โ1195. pubmed.ncbi.nlm.nih.gov
- Cundy T, Mackay J. (2011). Proton pump inhibitors and severe hypomagnesaemia. Current Opinion in Gastroenterology, 27(2), 180โ185. pubmed.ncbi.nlm.nih.gov
- Touyz RM. (2004). Magnesium in clinical medicine. Frontiers in Bioscience, 9, 1278โ1293. pubmed.ncbi.nlm.nih.gov
- Simental-Mendia LE, et al. (2018). Effect of Magnesium Supplementation on Glucose Metabolism in People With or At-Risk of Diabetes. European Journal of Clinical Nutrition, 72, 1045โ1060. pmc.ncbi.nlm.nih.gov
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Medical & Affiliate Disclaimer This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any supplement or medication. Some links in this post are affiliate links - if you purchase through them, Enavec Pharmacy may earn a small commission at no extra cost to you.
