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Thorne Magnesium Bisglycinate Powder

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Thorne · USA

Supplements › Minerals › Magnesium › Bisglycinate › Magnesium Bisglycinate Powder

Magnesium Bisglycinate Powder

Powder · 1 scoop (5.4 g) · Bisglycinate · 200 mg elemental per serving

NSF Certified for SportEvery production lot is screened against 290+ substances banned in competitive sport, plus label-claim potency and heavy metal limits.Non-GMOIngredients traced and tested to be free of genetically modified inputs above the 0.9% threshold.

Approximate conversion — the retailer charges in EUR.

Prices last synced: 11 Sept 2026, 14:56 UTC. Prices and availability are subject to change.

Essential Co-factors & Synergistic Pairings

Absorption Booster

Vitamin B6

Vitamin B6 supports cellular magnesium transport and retention.

No matching catalogue product yet.

Basic Nutrients 2/Day
Obligate Co-factor

Vitamin D3

Magnesium activates vitamin D, while vitamin D supports intestinal magnesium handling.

View Basic Nutrients 2/Day

Timing note: Separate magnesium from high-dose calcium above 1,000 mg and from iron to limit absorption competition.

Nutrient pairings are based on clinical absorption data. Statements regarding dietary supplements have not been evaluated by the FDA or EFSA and are not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before starting any supplementation protocol.

What it is

Sleep and neuromuscular relaxation

Who it suits

Sleep latency and depth, Neuromuscular relaxation, Anxiolytic support via glycine

Best price today

$45.54 at iHerb (US)

Verified clinical advantages

  • NSF Certified for Sport — every lot assayed for 290+ banned substances
  • Fully reacted bisglycinate, no oxide buffering
  • 200 mg elemental per scoop with no laxative rebound
  • Monk fruit sweetened, no artificial sweeteners

Trade-offs & compromises

  • Powder format requires dosing by scoop
  • Natural flavour blend is proprietary
  • Highest cost per 100 mg elemental in the magnesium cohort

Multi-store price comparison

MerchantBase priceShippingDeliveryStock
iHerbUS$45.54$7.075-8 business days In stockView on iHerb

Prices last synced: 11 Sept 2026, 14:56 UTC. Prices and availability are subject to change.

Disclosure: We are an independent comparison platform. We may earn an affiliate commission when you purchase through links on our site at no extra cost to you. As an Amazon Associate, we earn from qualifying purchases. Buttons take you to the named retailer's own site to complete your purchase.

Biochemical facts panel

Gross compound

1418 mg

Elemental active

200 mg

% Daily value

48%

Bioavailability

High

Two glycine molecules fully chelate the magnesium ion, forming a neutral ring structure absorbed intact through intestinal dipeptide (PepT1) transporters rather than the saturable paracellular route. Because the ion is not liberated in the lumen, osmotic water retention and the resulting laxative effect are largely avoided, and glycine itself acts as an inhibitory neurotransmitter at glycine receptors.

Target benefits

  • Sleep latency and depth
  • Neuromuscular relaxation
  • Anxiolytic support via glycine
  • Cramp reduction

GI tolerance & side effects

  • Mild sedation at high evening doses
  • Rare loose stools above 500 mg elemental

Renal & other contraindications

  • eGFR < 30 mL/min (renal insufficiency)
  • Concurrent quinolone or tetracycline antibiotics within 2 h
  • Myasthenia gravis (relative)

Upper tolerable intake: 350 mg/day elemental from supplemental sources (EFSA/IOM)

Full excipient & inactive additive disclosure

Monk fruit extractNatural flavorsCitric acid

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Approximate conversion — the retailer charges in EUR.

Prices last synced: 14 Sept 2026, 00:47 UTC. Prices and availability are subject to change.

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Approximate conversion — the retailer charges in EUR.

Prices last synced: 14 Sept 2026, 00:47 UTC. Prices and availability are subject to change.

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Approximate conversion — the retailer charges in EUR.

Prices last synced: 11 Sept 2026, 14:56 UTC. Prices and availability are subject to change.

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Approximate conversion — the retailer charges in EUR.

Prices last synced: 14 Sept 2026, 00:47 UTC. Prices and availability are subject to change.