Thorne Magnesium Bisglycinate Review: Sleep, Recovery & Value Breakdown

Magnesium bisglycinate has become one of the most popular supplement forms for people focused on sleep quality and post-exercise recovery. Thorne’s version is consistently among the top sellers in the category, but is it actually the best option for your needs and budget?

This review covers everything you need to know: formulation details, powder vs capsule comparison, real-world cost per serving, how it stacks up against competitors, and who should (and should not) buy it.

This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any supplement regimen.

What Is Magnesium Bisglycinate?

Magnesium bisglycinate (also called magnesium glycinate) is a chelated form of magnesium where each magnesium ion is bonded to two molecules of the amino acid glycine. This chelation is significant for two reasons:

Absorption: Chelated minerals are generally better absorbed in the digestive tract compared to non-chelated forms like magnesium oxide or magnesium citrate.
Tolerability: Magnesium bisglycinate is one of the gentlest forms on the stomach. It is far less likely to cause the digestive discomfort or loose stools associated with magnesium oxide or citrate.

The glycine component is also noteworthy. Glycine is an inhibitory amino acid that plays a role in relaxation and sleep readiness, which is one reason bisglycinate has become the preferred form for nighttime use.

For a broader look at magnesium supplements for sleep support, see our guide: Best Magnesium Supplements for Sleep.

Thorne Magnesium Bisglycinate: Product Overview

Detail	Powder	Capsule
Product name	Magnesium Bisglycinate Powder	Magnesium Bisglycinate
Magnesium per serving	200 mg	200 mg
Form	Powder (scoop)	Vegetarian capsule
Servings per container	60	30
MSRP	$32.00	$22.00
Cost per serving	$0.53	$0.73
Other ingredients	Citric acid, monk fruit extract	Hypromellose (capsule), leucine
Flavor	Slightly sweet, mild citrus	N/A
NSF Certified for Sport	No	No

Prices reflect MSRP on thorne.com as of early 2026.

Powder vs Capsule: Which Should You Choose?

This is one of the most common questions, and the answer depends on your priorities.

Choose the Powder If:

You want the best value. At $0.53/serving vs $0.73/serving, the powder saves you about $0.20 per day, which adds up to roughly $73/year.
You prefer flexible dosing. With a scoop, you can easily take a half or quarter serving. Capsules are fixed at 200 mg.
You mix it into a nighttime drink. The powder dissolves well in warm or room-temperature water and has a mild, slightly sweet flavor from monk fruit extract.
You dislike swallowing capsules. Some people simply prefer drinking their supplements.

Choose the Capsule If:

Convenience is your top priority. Two capsules, no measuring, no mixing.
You travel frequently. Capsules are easier to pack and take on the go.
You are sensitive to flavors or sweeteners. The capsule has no taste.
You want a smaller initial investment. The capsule bottle is $22.00 vs $32.00 for the powder, even though the per-serving cost is higher.

Side-by-Side Value Comparison

Metric	Powder	Capsule
Cost per serving	$0.53	$0.73
Monthly cost (1 serving/day)	$16.00	$22.00
Annual cost (1 serving/day)	$192.00	$264.00
Annual savings (powder vs capsule)	—	$72.00 more

Verdict: The powder is the better value by a meaningful margin. Unless convenience or travel-friendliness is a dealbreaker, the powder is the way to go.

How Thorne Compares to Competitors

Cost Per Serving: Magnesium Bisglycinate

Brand	Product	Mg per Serving	Servings	Price	Cost/Serving
Thorne	Magnesium Bisglycinate Powder	200 mg	60	$32.00	$0.53
Thorne	Magnesium Bisglycinate Capsule	200 mg	30	$22.00	$0.73
NOW Foods	Magnesium Glycinate	200 mg	90	$18.00	$0.20
Pure Encapsulations	Magnesium Glycinate	120 mg	90	$27.00	$0.30
Life Extension	Magnesium (Citrate/Glycinate)	200 mg	100	$12.00	$0.12
Doctor’s Best	High Absorption Magnesium	200 mg	120	$16.00	$0.13
KAL	Magnesium Glycinate	200 mg	60	$16.00	$0.27

A few important notes on this table:

NOW Foods is the most direct competitor at the same 200 mg dose and chelated glycinate form, at less than half the price.
Life Extension uses a citrate/glycinate blend, which is a different formulation and may not be as gentle on the stomach as pure bisglycinate.
Pure Encapsulations only delivers 120 mg per serving, so you would need to take more capsules to match the 200 mg dose, which changes the effective cost.

For deeper brand-level comparisons, see:

Sleep Quality and Nighttime Routine

Magnesium bisglycinate has become a popular part of nighttime wind-down routines. Here is why:

Magnesium’s role in relaxation: Magnesium is involved in hundreds of enzymatic reactions in the body, including those related to nervous system regulation and muscle relaxation. Many people report that consistent magnesium supplementation supports a calmer transition to sleep.

Glycine’s contribution: The glycine in magnesium bisglycinate may support relaxation in its own right. Research has explored glycine’s role in body temperature regulation and subjective sleep quality, though individual results vary widely.

How people typically use it: The most common approach is taking one serving (200 mg) 30–60 minutes before bed, either mixed in warm water (powder) or with a small glass of water (capsule). Some users combine it with other sleep-supportive habits like dimming lights, limiting screens, or herbal tea.

What to expect: Magnesium is not a sedative. Most people who notice a difference describe it as a subtle improvement in how quickly they feel relaxed and ready for sleep, not a dramatic “knockout” effect. Effects tend to build over 1–3 weeks of consistent use.

For a broader comparison of magnesium forms for sleep, including threonate, glycinate, and citrate, see our dedicated guide: Best Magnesium Supplements for Sleep.

Recovery and Exercise Support

Beyond sleep, magnesium bisglycinate is popular among athletes and fitness enthusiasts for recovery support.

Muscle relaxation: Magnesium plays a key role in muscle contraction and relaxation cycles. People who exercise regularly often report that consistent magnesium supplementation supports post-workout recovery and reduces the frequency of muscle cramps.

Electrolyte balance: Magnesium is one of the key electrolytes lost through sweat during exercise. Replenishing it supports normal hydration and muscle function.

Who benefits most: Individuals with high training volume, those who sweat heavily, and anyone whose diet is low in magnesium-rich foods (leafy greens, nuts, seeds, whole grains) may notice the most from supplementation.

Note for tested athletes: Thorne’s Magnesium Bisglycinate is not NSF Certified for Sport. If you need that certification, you may need to look at Thorne’s other certified products or other brands. Learn more about what NSF Certified for Sport means.

Ingredient Quality and Formulation Details

What Thorne Gets Right

Pure bisglycinate form: Some competitors use magnesium oxide “buffered” with glycine and market it as glycinate. Thorne uses genuine magnesium bisglycinate chelate.
Minimal other ingredients: The powder contains citric acid and monk fruit extract. The capsule contains hypromellose (vegetarian capsule material) and leucine (flow agent). No magnesium stearate, artificial colors, or preservatives.
No allergens: Free of gluten, dairy, soy, eggs, tree nuts, peanuts, fish, and shellfish.
Third-party tested: Manufactured in NSF-registered facilities with Certificate of Analysis available.

What Could Be Better

No NSF Certified for Sport: For a brand known for sport certification, this product does not carry it.
200 mg per serving: While this is a solid dose, some people targeting 300–400 mg of elemental magnesium daily will need to double the serving, which doubles the cost.
Monk fruit in powder: While monk fruit is a natural sweetener with no calories, some people prefer completely unflavored supplements.

Who Should Buy Thorne Magnesium Bisglycinate?

It Is a Good Fit If You:

Want a genuine chelated magnesium bisglycinate from a trusted brand
Prioritize clean formulations with minimal additives
Value third-party tested supplements from GMP-certified facilities
Are willing to pay a moderate premium for brand trust and quality assurance
Want the powder form for flexible dosing and better value

It May Not Be the Best Fit If You:

Are on a tight supplement budget (NOW Foods offers comparable quality at less than half the price)
Need 300+ mg per serving in a single dose
Require NSF Certified for Sport designation
Prefer completely unflavored powder without any sweetener

How to Get the Best Price

Method	Estimated Savings
Thorne.com Subscribe & Save	10–15% off MSRP
Amazon Subscribe & Save	5–15% off, varies
Thorne.com bundle (3+ products)	Up to 20% off
Waiting for seasonal sales	15–25% off during promotions

The most cost-effective approach is typically buying the powder form through Thorne’s subscribe-and-save program, which brings the per-serving cost closer to $0.45.

Shop on Thorne: Magnesium Bisglycinate →

Frequently Asked Questions

How much magnesium bisglycinate should I take per day?

Thorne’s recommended serving is 200 mg of elemental magnesium (one scoop of powder or two capsules). The National Institutes of Health lists the Recommended Dietary Allowance for magnesium at 310–420 mg/day for adults, depending on age and sex. Since you also get magnesium from food, 200 mg from supplementation is a common and reasonable starting point. Consult a healthcare professional for personalized guidance.

When is the best time to take magnesium bisglycinate?

Most people take it in the evening, 30–60 minutes before bed, to support relaxation and sleep quality. However, it can be taken at any time of day. Some people prefer to split the dose, taking half in the morning and half at night. Consistency matters more than exact timing.

Can I take magnesium bisglycinate with other supplements?

Magnesium bisglycinate is generally well-tolerated alongside other supplements. However, it may compete for absorption with calcium, zinc, and iron if taken at the exact same time in high doses. A common approach is to take magnesium separately from a multivitamin or mineral supplement by at least 1–2 hours.

Does Thorne Magnesium Bisglycinate have side effects?

Magnesium bisglycinate is one of the gentlest forms of magnesium on the digestive system. At the recommended 200 mg dose, most people experience no adverse effects. In high doses (400+ mg elemental magnesium), some people may experience mild digestive changes. If you have kidney concerns or take medications, consult your healthcare provider.

Is Thorne Magnesium Bisglycinate vegan?

The powder form is vegan-friendly. The capsule form uses a vegetarian (hypromellose) capsule and is also suitable for vegans. Neither product contains animal-derived ingredients.

How does Thorne’s magnesium compare to Natural Calm?

Natural Calm uses magnesium citrate, a different form than Thorne’s bisglycinate. Citrate is also well-absorbed but more likely to have a laxative effect at higher doses. Bisglycinate is generally preferred by people who want the relaxation benefits without digestive side effects. Natural Calm is less expensive on a per-serving basis.

Is the powder form as effective as capsules?

Yes. The magnesium bisglycinate in both forms is the same compound at the same dose (200 mg). The powder may absorb slightly faster since it is already dissolved, but the practical difference is minimal. Choose based on convenience and cost preference.

Final Verdict

Thorne Magnesium Bisglycinate is a well-formulated, clean product that delivers genuine chelated magnesium bisglycinate without unnecessary fillers. The powder form offers solid value at $0.53/serving and is the better choice for most people.

However, it is not the cheapest option in the category. NOW Foods Magnesium Glycinate delivers a comparable product at $0.20/serving. If brand trust, formulation transparency, and Thorne’s manufacturing standards matter to you, the premium is reasonable. If you are purely optimizing for cost, there are alternatives that deliver the same ingredient for less.

Rating: 4.2 out of 5

Ingredient quality: 5/5
Value for money: 3/5
Taste and mixability (powder): 4/5
Convenience: 4/5 (powder), 5/5 (capsule)
Transparency: 5/5

For a complete overview of Thorne’s full product line, see our Thorne Supplements Review 2026. For a broader cost analysis across their range, read Are Thorne Supplements Worth the Price?.