







Magnesium Bisglycinate Powder - 180gm
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You've been taking magnesium for months. You still can't sleep. The problem isn't magnesium, it's the form.
Most brands sell you magnesium supplement buffered with magnesium oxide or just simply magnesium oxide because it's cheap to manufacture. Your body absorbs about 4% of it. The other 96% passes through your digestive system unused, which is also why oxide causes the laxative effect people blame on "magnesium."
Magnesium bisglycinate is the form most people know as magnesium glycinate. Each magnesium molecule is bonded to two glycine molecules so it travels through the intestinal wall intact via the dipeptide transport pathway. Absorption is significantly higher than oxide or citrate. More magnesium reaches your cells, which means you actually feel the difference.
Magnesium glycinate vs citrate vs oxide
| Form | Absorption | GI effect | Common in |
|---|---|---|---|
| Bisglycinate/glycinate (iThrive) | 80–90% | Gentle — no laxative effect | Premium clinical brands |
| Citrate | 25–35% | Mild — loose stools at higher doses | Mid-tier brands |
| Oxide | 3–4% | Strong laxative — most exits unused | Mass-market/pharmacy |
Key benefits
What iThrive Magnesium Bisglycinate supports:
- Sleep quality — magnesium activates GABA receptors that help the nervous system wind down before sleep; glycine acts as an additional inhibitory neurotransmitter for calm
- Muscle relaxation and recovery — required for both muscle contraction and the release that follows; may help reduce cramps and delayed soreness
- Stress and anxiety — magnesium plays a key role in regulating the HPA axis (stress response); glycine supports a calming effect on the central nervous system
- Nervous system support — magnesium plays a role in nerve signalling and vascular tone, both relevant to migraine research; bisglycinate's higher absorption may support this better than other forms.
- Hormonal balance and PMS — magnesium may help reduce PMS symptoms including mood changes, cramps, and fluid retention
- Bone health — works in concert with Vitamin D3 and Vitamin K2 for calcium absorption and bone mineral density
- Energy and metabolic function — participates in more than 300 enzymatic reactions including ATP production, DNA synthesis, and glucose metabolism
Pure formulation. Nothing unnecessary.
No magnesium stearate. No silicon dioxide. No artificial colours. No titanium dioxide. No talc. No preservatives.
Most supplement manufacturers add these as flow agents or anti-caking agents to speed up production. We don't. Every gram of this powder is magnesium bisglycinate, no fillers, nothing synthetic.
Practitioner's Note

"I put this in every ALIVE client's protocol and for good reason, across thousands of functional assessments, magnesium deficiency is the single most consistent finding we see, regardless of the presenting health concern. Standard magnesium supplements rarely move the needle because the form isn't absorbed. Bisglycinate is the only form I've seen reliably restore magnesium levels and produce noticeable improvements in sleep, muscle tension, and mood within four to six weeks. If you're sleeping badly, cramping, anxious, or constantly fatigued, this is almost always where we start."
Mugdha Pradhan
Founder & Functional Nutritionist, iThrive · 10+ years clinical practice
Essentials are not generic supplements sold alongside the program. They are the protocol.
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What practitioners tell their clients about our magnesium?
Independently tested
Don’t take our word for it. Read the report.
Every batch is tested by an independent lab for what should be in it and what shouldn’t. Here’s the report for the batch you’ll receive.
- Potency: elemental magnesium per serving.
- Heavy metals: lead, arsenic, cadmium, mercury.
- Microbial safety: yeast, mould, E. coli, Salmonella.
Results and limits: each test lists the result, the maximum or minimum allowed, and a pass or fail. “Complies” means the sample met the standard it was tested against.
% w/w: grams per 100g of product. If it says “dry weight”, the figure is measured after the moisture is removed.
mg/kg (also written ppm): milligrams per kilogram, used for trace amounts such as heavy metals. 1 mg/kg is one part in a million.
BLQ, BDL or ND: “below limit of quantification”, “below detection limit” or “not detected”. The lab tested for it and found less than its equipment can measure.
cfu/g: the count of living microbes per gram. Lower is better.
Absent /25g: the lab checked a 25g sample for that microbe, such as Salmonella, and found none.
Trace minerals without a limit: small amounts of copper, zinc or similar minerals occur naturally in raw ingredients and are listed for completeness.
Each report covers the batch tested, so check the batch number against the one printed on your pack.
Dive into the benefits of
Magnesium Bisglycinate
Magnesium activates GABA receptors that calm the nervous system. Glycine, the amino acid it’s chelated with, acts as a separate inhibitory neurotransmitter, a natural dual-action sleep stack in a single ingredient.
Required for both muscle contraction and the relaxation that follows. May help reduce cramps, tightness, and delayed soreness after exercise without the laxative effect of cheaper magnesium forms.
Magnesium is a cofactor in over 300 biochemical processes — including ATP energy production, DNA repair, and glutathione synthesis. Most people running on empty are magnesium deficient and don’t know it.
Magnesium deficiency is consistently associated with migraine frequency, PMS symptoms, and stress response dysregulation. The bisglycinate form’s superior absorption means more magnesium actually reaches the cells where it’s needed.

Elemental Magnesium
Each magnesium ion is bound to two glycine molecules via the dipeptide transport pathway. This bond protects the mineral through digestion and allows it to be absorbed via the amino acid pathway, rather than competing with other minerals at the same intestinal transporter. The result is significantly higher intracellular magnesium delivery than oxide or citrate forms.
Single declared ingredient. No fillers, binders, or flow agents in the formulation.
Third-party lab tested for purity and potency. Full batch report available below.
Check our blog for more ingredient info
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Frequently Asked Questions
Magnesium
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