Written by Belen Paoletti (Specialist in Emotional Branding, Expert in Research & Consumer Insights, and Data Marketing Strategist)
Art by Valentina Taraborelli

Magnesium glycinate is a highly bioavailable form of magnesium, known for its gentle effect on the stomach and its ability to support multiple areas of health—especially sleep, muscle function, stress regulation, and nervous system balance. Unlike some other forms of magnesium that may cause digestive upset or have limited absorption, magnesium glycinate is often preferred for its superior tolerance and effectiveness.

This mineral plays a vital role in over 300 enzymatic processes in the body, and many people may not get enough through diet alone—especially those dealing with stress, intense physical activity, or certain health conditions. Supplementing with magnesium glycinate can help address these deficiencies and contribute to better overall wellbeing.

In this article, we present the Top 5 Magnesium Glycinate Supplements in the U.S., based on thousands of verified user reviews across platforms like Amazon, iHerb, Walmart, and Target. We’ve explored what real users say about each product’s benefits, absorption, side effects, and value. 

As always, it’s important to consult with a healthcare provider before starting any new supplement—particularly if you’re managing chronic health conditions, taking medications, or are pregnant or breastfeeding. Everyone’s needs are unique, and personalized advice will help ensure you choose the safest and most effective option for your body.

1. Doctor’s Best High Absorption Magnesium

Average User Score

4.8/5, based on over +492,000 reviews from iHerb, Target, Walmart, and Amazon.

Highlights

• Better Sleep & Calm: Many users report that it helps them fall asleep faster, stay asleep, and feel calmer. Over 1,300 Amazon reviewers mention sleep benefits. One wrote: “I take this at bedtime and it relaxes me and helps me sleep.” A Target customer noted: “I’ve been sleeping better taking 2 a day. I will continue to purchase this.” iHerb reviews echoed this: “I’ve purchased this magnesium to improve my sleep quality and I’ve accomplished it.”
• Muscle Cramp Relief: Users highlight reduced muscle cramps, tension, and even heart palpitations. A Walmart reviewer said: “Taking this daily has significantly reduced the frequency and intensity of my cramps.” One Amazon user shared: “I suffer at night with severe cramps and this product is great.” It’s also valued for joint and nerve support.
• Easy on Stomach: Many appreciate that this magnesium is gentle on digestion. Reviewers often say it causes no stomach discomfort or laxative effect. One Amazon user wrote: “It absorbs brilliantly without digestive issues.” Another iHerb customer added: “No stomach discomfort, and no unnecessary fillers.”
• Trusted Quality: People describe it as high purity, well-absorbed, and effective. An Amazon user wrote: “A steady supplement that’s earned a spot in my routine.” Another iHerb customer stated: “This supplement’s quality is excellent.” It’s considered a good value for its health benefits.

Criticism

• Tablet Size: Many call them “horse pills” and say they’re hard to swallow. One Target reviewer warned: “Almost impossible to swallow. Buy the capsules instead.” iHerbs users agree: “Good product but the tablets are too big.” Some cut the tablets into halves or quarters to manage them.
• A few users report no noticeable benefit, but these are a small minority. Others wish for fewer additives in the tablet form or prefer the capsule version with a simpler ingredient list. Some opt for powdered forms for easier use.

Testimonials 

• “I take it before going to bed & sleep better now.”
• “I was looking for a pill I could swallow, and this one fit the bill. Other larger tablets just would not go down.” 
• “I like to take them at bedtime. They are calming and soothing.”
• “Doctor’s Best High Absorption Magnesium works very well. Several family members in our household use this one with no issues. Only one tablet needed. Twelve hours later, bowels move great, proving that this definitely works.” 
• “I have been sleeping better taking (2) a day, one at lunch and one at bedtime… I will continue to purchase this mag.”

2. Solaray Magnesium Glycinate

Average User Score

4.8/5, based on over +55,800 reviews from iHerb and Walmart.

Highlights

• Better Sleep & Relaxation: One of the most common praises is improved sleep quality and a calming effect. Many users report deeper, more restful sleep and reduced anxiety or stress levels after taking this supplement. As one reviewer noted, “Sleep is deeper and inflammation is decreased… I am more relaxed.” Another user mentioned seeing sleep improvements from the very first day, even measuring better sleep quality with a smartwatch. 
• Muscle Comfort & Cramp Relief: A large number of reviews praise the supplement’s help with muscle function and relief from cramps or tension. Users ranging from athletes to older adults have found fewer muscle spasms and night-time leg cramps “gone” after using this magnesium. For example, a 5-star Walmart review stated, plainly, “This stops my severe muscle cramps.” Many also report faster post-workout muscle recovery and overall comfort in muscles and joints thanks to consistent use of this product.
• Gentle on Digestion (No Laxative Effect): Unlike some other magnesium forms, this fully chelated magnesium glycinate is frequently described as easy on the stomach. Reviewers appreciate that it does not cause digestive upset or diarrhea—a known issue with certain magnesium supplements—making it suitable for daily use. One user noted that “I sleep better and my digestion returned to normal” after switching to this product. This gentler effect is likely due to the glycinate form, and several customers confirm they experienced no laxative side-effects, even with regular dosing.
• High Quality & Absorption: Many buyers feel the product lives up to its “High Absorption” name. They often call out the excellent quality of Solaray’s formulation, noting that magnesium glycinate is one of the most bioavailable forms. “This is one of the most absorbable forms of magnesium,” explains one satisfied reviewer. Users have confidence that they’re actually getting the magnesium benefits without the waste or discomfort associated with cheaper forms. Additionally, the inclusion of BioPerine (black pepper extract) is cited as a plus for enhancing absorption.
• Capsule Convenience: The supplement comes in vegetarian capsule form, which users generally find easy to swallow. Comments point out the capsules are moderate in size and have no bad aftertaste. “These capsules are great. Easy to swallow and don’t taste like plastic,” one customer wrote, applauding the pill design and coating quality.
• Overall Well-Being: Beyond the specific areas above, reviewers frequently mention feeling more balanced and healthy after adding this magnesium to their routine. Some report improvements in issues like restless legs, migraines, or heart palpitations, attributing relief to better magnesium levels. Others simply describe an enhanced sense of calm and well-being throughout the day. 

Criticism

• Large Serving Size: A point of contention for some is the dosage requirement—the 350 mg daily serving is divided into 4 capsules per day. A few users find it inconvenient to take four pills for a full dose, especially if they prefer not to swallow many capsules at once. One buyer liked the product overall but complained that “taking 4 capsules per dose wasn’t very convenient.” 
• Individual Results Vary: As with any supplement, not everyone experiences the same benefits. A small minority of reviewers gave moderate or low ratings because they didn’t notice a significant change in their sleep or health issues.
• Price & Value: A few cost-conscious customers mention that Solaray’s magnesium glycinate, while high quality, is a bit more expensive than some other magnesium supplements. It’s noted to be “slightly more expensive than other forms of magnesium” on the market.

Testimonials

• “I take 2 every night before bed to help my body wind down, and these capsules are great. Easy to swallow and capsules don’t taste like plastic.”
• “I’m on my fourth bottle of High Absorption Magnesium Glycinate, and I couldn’t be happier with the results. This supplement has consistently helped me manage stress and improve my sleep quality.”
• “This stops my severe muscle cramps.”
• “Easily digestible capsules that help you sleep better… This is one of the most absorbable forms of magnesium.”

3. KAL High Absorption Magnesium Glycinate

Average User Score

4.8/5, based on over +25,000 reviews from iHerb and Walmart.

Highlights

• Better Sleep & Relaxation: A huge number of reviewers report improved sleep quality and relaxation. Many say the supplement helps them unwind in the evening, fall asleep faster, and wake up more refreshed. In fact, one user called it a “game-changer” for promoting calm sleep and morning energy. 
• Relief of Muscle Cramps and Tension: Customers widely praise its efficacy in reducing muscle cramps, aches, and tension. For example, a reviewer noted a “remarkable reduction in muscle cramps and tension, especially after workouts,” once they began taking this magnesium. Some also say it supports joint comfort and overall muscle/joint health.
• Gentle on the Stomach: Reviewers appreciate that it does not have the laxative effect associated with other magnesium types (like citrate). According to one summary, users consistently report it is “gentle on the stomach and has no unpleasant taste.” 
• High Quality & Effective Formula: Many buyers feel the product is high-quality and well-formulated. For instance, one iHerb reviewer noted it is a “very high quality product” with an “excellent natural composition”, and confidently recommended it to others.
• No Unpleasant Taste, Easy to Swallow Capsules: As a vegan capsule supplement, it has no flavor and goes down easily for most users. Capsule size is generally reported as moderate—one reviewer specifically noted that “the capsule size is easy to take”. The neutral taste and absence of any chalkiness or odor are additional pluses mentioned in reviews.
• Value and Quantity: Many customers feel it’s good value for the money. One bottle can last a long time, which reviewers appreciate. For example, a user pointed out that having 160 capsules meant the supply “lasts me for almost six months” with their regimen. The sturdy packaging and safety seal also earned positive remarks, ensuring the product arrives intact and has a decent shelf life.

Criticism

• No Noticeable Effect for Some: A small minority of customers report that they did not experience the expected benefits. These individuals often say they felt no significant change in sleep quality, stress levels, or muscle cramps after finishing a bottle.
• Formula / Serving Size Changes: A notable complaint from longtime users is a recent formula change or change in recommended serving size. Some loyal customers claim the newer version requires taking more capsules to get the same dose of magnesium, which they find inconvenient. One long-term reviewer, who initially found the product effective and gentle, lamented that “the new formula is a huge downgrade,” noting you now need to take four capsules for a full 350 mg dose. 
• Large Capsules / Swallowing Difficulty: Although most find the veggie caps easy to swallow, a handful of users felt the capsules are too large or cumbersome. One reviewer complained that the “capsules are harder to swallow” compared to a tablet form they had tried. However, this was not a universal complaint and others actually found capsules preferable to tablets (which can stick in the throat). 
• Individual Adverse Reactions: Reports of side effects are rare, but there are isolated cases of unusual reactions. For instance, one user actually experienced increased anxiety or restlessness when taking this magnesium. That reviewer speculated that the glycinate form “did not suit” them personally, even though they had positive experiences with other forms of magnesium. A few others have mentioned mild stomach upset or nausea, but these cases are few and far between—most users did not report any side effect issues. 

Testimonials

• “Magnesium glycinate from iHerb has been a game-changer for me! It helps me relax, fall asleep faster, and wake up feeling refreshed.”
• “Since I began taking [this] high absorption magnesium glycinate, I’ve noticed a remarkable reduction in muscle cramps and tension, especially after workouts.”
• “I found it to be convenient and highly effective. But this new formula is a huge downgrade. You now need to take 4 capsules just to [get the same amount].”

4. Nature Made Magnesium Glycinate

Average User Score

4.6/5, based on over +25.800 reviews from iHerb, Target, Walmart, and Amazon.

Highlights

• Improved Sleep & Relaxation: A majority of reviewers report better sleep quality and a sense of calm. Many say it helps them unwind at night and wake up more rested. 
• Gentle on the Stomach (High Absorption): Unlike some magnesium oxide supplements, it tends not to cause upset stomach or laxative effects, which is a notable plus in reviews. Many feel the “high absorption” claim holds true, observing they get the benefits without gastrointestinal side effects.
• Muscle, Nerve & Heart Health Benefits: Numerous reviewers attest that this magnesium has helped with muscle cramps, tension, and even joint stiffness. For example, one user noted “a real difference in my muscle recovery and joint comfort” after switching to this supplement. Others report that it supports their exercise recovery or calms muscle spasms. 
• Trusted Brand & Quality: Many customers chose Nature Made for its reputation and were not disappointed. Reviews frequently praise the “excellent quality” of the product. Users mention that the capsules contain no synthetic dyes or unnecessary fillers, and that Nature Made is a brand they trust. The top-notch ingredients and USP certification give buyers confidence in what they’re taking.
• Energy and Mood Support: A number of users have reported subtle boosts in energy levels and improved mood or stress relief when taking this supplement. For example, one reviewer observed that “it gives me energy and helps me with my mood.”

Criticism

• Large Capsule Size: By far the most common complaint is the pill size. Many users find the capsules unusually large and hard to swallow. Several reviews describe the capsule as “much too large”—with some people unable to swallow it at all. A few even reported choking or gagging on the pill, calling it “dangerous” and urging the manufacturer to make it smaller. Because the serving is two capsules, those with swallowing difficulties find this especially troublesome. 
• Formula or Taste Changes: A handful of long-term users noticed a recent formula change. In reviews, some commented that a new bottle looked or tasted different than before—with one user “disappointed” by a strange taste in the latest batch. They wondered if the product was reformulated. 
• No Effect for a Few Users: As with any supplement, a small minority reported little to no noticeable benefit. A few individuals said they didn’t feel the improvement they hoped for, or that certain issues (like muscle pain or constipation) persisted despite taking the product. 
• Capsule Composition (Gelatin): The capsules contain animal-derived gelatin (pork-based gelatin), which may upset vegetarians or those avoiding pork. This is something to be aware of if one has dietary restrictions—it’s an “unhealthy” or unacceptable ingredient for those individuals, as one question on the product page highlighted.

Testimonials

• “This magnesium supplement is outstanding! The quality and ingredients are top-notch, and I’ve noticed a real difference in my muscle recovery and joint comfort.”
• “I’ve tried other forms of magnesium glycinate and never felt much of a difference, but with these I sleep so well at night, and wake up feeling more rested! Definitely my preferred brand.”
• “Capsule is much too large; cannot swallow it so I cannot use the product. I wish I could have seen the capsule size prior to purchase.”

5. NOW Foods Magnesium Glycinate

Average User Score

4.7/5, based on over +8.500 reviews from iHerb, Target, and Walmart.

Highlights

• Improved Sleep Quality and Relaxation: Countless reviewers report deeper, more restful sleep and an easier time either falling or staying asleep through the night. Many say taking these tablets in the evening helps them unwind and wake up feeling refreshed. It also reduces nighttime anxiety or overactive thoughts at bedtime. As one reviewer said: “This product really calms the brain. It helps me sleep now that I’m going through peri menopause.”
• Muscle, Nerve, and Pain Relief: Many users praise the supplement for alleviating muscle cramps, tension, and even chronic aches. Some note relief from headaches or migraines. A long-term user shared: “Since taking this OTC medicine I have been getting a great night’s sleep and this has also helped my lower back pain without feeling drowsy or tired.”
• Gentle on the Stomach, High Absorption: Users frequently mention that this magnesium glycinate is easy on digestion and doesn’t cause GI issues, unlike other magnesium forms. One review stated: “No stomach upset at all, even when I take two tablets.”
• Quality of Ingredients and Trustworthy Brand: Many appreciate the clean formula, vegan-friendly profile, and NOW’s solid brand reputation. One user noted: “The ingredients are clean, with no unnecessary additives.”
• Overall Wellness: Some mention feeling less anxious, more focused, or experiencing improved hormonal balance. Spanish-speaking users echo similar themes: “Very good quality… they help me sleep better and relax my muscles” and “Excellent quality, taste’s not bad… it helps me with sleep and joints.”
• Ease of Use and Value: Despite the pill size, many describe them as coated and easy to swallow, with no bad taste. Reviewers also highlight the large tablet count and low cost as excellent value. One wrote: “Highly recommend! Helps with relaxation and sleep.”

Criticism

• Tablet Size: The most common complaint is about the large size of the tablets. Some users find the pills a bit too big or chalky, which can make them harder to swallow. In fact, there is a split in opinion—whereas many customers don’t mind the tablet size, a notable minority feels the pills are “too big to swallow” comfortably. It’s worth noting that each tablet is packed with 100 mg of elemental magnesium (as glycinate), so the size is comparable to other high-dose mineral supplements. 
• Dosage (Multiple Tablets Required): A related point of discontent for a few users is that you need to take two tablets to get a 200 mg dose of magnesium (since each tablet is 100 mg elemental). Some commenters, especially those comparing to other products, wished each pill contained more magnesium so that only one tablet would be needed per serving. 
• No Immediate or Noticeable Effect for Some: Although the vast majority experienced positive results, a small number of users did not feel a significant difference or the specific benefit they were hoping for. In 1-star or 3-star reviews, you can find a few people saying that “it didn’t work for me” or that they didn’t observe the dramatic improvement others reported. 

Testimonials 

• “This product really calms the brain. It helps me sleep now that I’m going through peri menopause…”
• “Since taking this OTC medicine I have been getting a great night’s sleep and this has also helped my lower back pain without feeling drowsy or tired.”
• “Highly recommend! Helps with relaxation and sleep.”