Magnesium is involved in over 300 enzymatic reactions in the body. It plays a critical role in muscle function, nerve transmission, blood sugar regulation, blood pressure, protein synthesis, and sleep quality. Despite its importance, studies suggest that somewhere between 50 and 70 percent of Americans do not get adequate magnesium from diet alone.
The reasons are fairly simple. Magnesium has been progressively depleted from agricultural soil over decades, meaning the vegetables and grains we eat contain less of it than they once did. Many people also drink filtered water that removes naturally occurring magnesium. The result is widespread low-level deficiency that affects everything from sleep quality to exercise performance to stress tolerance.
Magnesium glycinate is magnesium bound to the amino acid glycine. This combination does two useful things. First, glycine itself has calming properties and supports sleep quality. Second, the glycinate form is highly bioavailable and much gentler on the digestive system than common forms like magnesium oxide or citrate, which can cause loose stools at higher doses. If you have tried other forms of magnesium and experienced GI discomfort, glycinate is almost certainly the solution.
The effects of magnesium glycinate are subtle rather than dramatic. It is not like taking melatonin where you feel a clear signal. What I notice over time is that muscle soreness after hard training sessions resolves faster, that I feel more relaxed in the evenings, and that sleep quality improves in a quiet, background way. These are the kinds of improvements that compound over time rather than hitting you all at once.
I have recommended Thorne multiple times across these reviews and that is intentional. Their quality standards are consistently excellent. No unnecessary fillers, no artificial colors or flavors, rigorous testing, and full transparency. For something you are taking every day long-term, trusting the brand matters. Thorne has earned that trust over many years in the industry.
I take two capsules about an hour before bed. Some people prefer to take it with dinner. Either works well. The key is consistency. Magnesium works best as a daily foundational supplement rather than something you take occasionally. Give it two to four weeks before judging its effectiveness, since rebuilding magnesium stores takes time.
| Magnesium per Serving | 200mg |
| Form | Bisglycinate (Glycinate) |
| Capsules per Serving | 2 |
| Servings | 60 |
| NSF Certified | Yes |
| GI Tolerance | Excellent |
| Price per Serving | ~$0.87 |
| Best Timing | Evening, with or before bed |