Thorne Magnesium Bisglycinate
A well-absorbed, gentle magnesium in the fully chelated bisglycinate form: 200mg elemental per serving, NSF Certified for Sport, monk-fruit sweetened.
Magnesium is one of the few supplements with a genuine population-level case, but the form is everything. Thorne uses the chelated bisglycinate form most people actually tolerate.
A large share of adults fall short of the recommended magnesium intake, and the mineral is involved in hundreds of processes including those tied to sleep, muscle function, and the stress response. The catch is the form. Cheap magnesium oxide is poorly absorbed and notorious for sending people to the bathroom; the chelated forms cost more but are gentler and better absorbed.
Thorne Magnesium Bisglycinate uses the fully chelated bisglycinate form, magnesium bound to the amino acid glycine, which is the form most people tolerate well and the one commonly chosen for evening use. Each serving delivers 200mg of elemental magnesium in a powder you mix into water, lightly sweetened with monk fruit rather than sugar or sucralose. It is NSF Certified for Sport, so the finished product is independently tested.
At $52 for 60 servings it sits above commodity magnesium. The premium buys the chelated form, the clean sweetener, and the third-party certification, not a different mineral.
Anyone who wants a well-absorbed, gentle magnesium for evening or recovery use, or who reacted badly to cheap magnesium oxide.
You already get enough magnesium from diet, or you want a capsule rather than a mix-in powder.
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Thorne Magnesium Bisglycinate - buyer FAQ
Why magnesium bisglycinate instead of cheaper forms?
Magnesium oxide is the cheapest and most common form, but it is poorly absorbed and frequently causes loose stools. Bisglycinate is magnesium chelated to the amino acid glycine, which is better absorbed and far gentler on digestion, which is why it is the form most often chosen for evening or daily use. You pay more, but the absorption and tolerability difference is real.
How much magnesium does it provide?
200mg of elemental magnesium per serving, as fully chelated magnesium bisglycinate. The elemental figure is the one that matters, since it is the actual magnesium delivered rather than the weight of the whole compound. That is roughly half the daily recommended intake for most adults, so treat it as a top-up rather than a megadose.
Is it NSF Certified for Sport?
Yes, this specific powder SKU is NSF Certified for Sport, meaning an independent lab tests the finished product for banned substances and label accuracy. As always with Thorne, certification is per-product, so confirm the seal on the exact item you buy.
When should I take magnesium?
Many people take magnesium in the evening, since the bisglycinate form is associated with relaxation and is commonly used to support sleep quality, though it can be taken any time with food. Start with one serving and adjust. If you take prescription medication or have kidney issues, talk to your clinician first. Nothing here is medical advice.