KAL Magnesium Glycinate Review

KAL High Absorption Magnesium Glycinate 350 is a dietary supplement in 160 VegCaps from KAL, a brand the page describes as trusted since 1932. The product is positioned for relaxation support and is described as fully chelated, which the page says makes it easy for the body to digest and absorb. The page explains that magnesium glycinate, also known as bisglycinate, is gentle on the stomach. The product page states that it may help support relaxation, bone health, enzymatic function, and muscular health. KAL presents three points as its difference. It says the product is better quality because it is lab-tested for purity and potency. It says the form is better because it provides highly absorbable magnesium glycinate. It also says the product is better for people because it is suitable for vegan diets. The label lists the product as vegan, gluten-free, non-GMO, and soy-free, and the page notes it is Non GMO Project Verified and made without soy. Each serving is four VegCaps, and the bottle contains 40 servings. The suggested use is to take four VegCaps daily with a meal or a glass of water and to use only as directed. Each serving provides 350 mg of magnesium from magnesium bisglycinate, which the page lists as 83 percent of the Daily Value. The formula also contains 5 mg of BioPerine black pepper extract. The other ingredients are a vegetable cellulose capsule, magnesium stearate, cellulose, and silica. The page lists a best-by date of 04/2027, a first-available date of 02/2022, and a product code of CAL-39022. The UPC printed on the page is 021245390220. The package quantity is 160 count, and the dimensions are 5.3 by 2.85 by 2.85 inches. The warnings advise not using the product if the safety seal is broken or missing, keeping it out of reach of children, and having a licensed health care practitioner informed when using it. The label also says to store it in a cool, dry place. The page notes that manufacturing or ingredient changes may be pending update and that items may occasionally ship with alternate packaging, while freshness is guaranteed. Customer questions on the page focus on dosage, since the serving is four capsules and each capsule contains 350 mg of magnesium. Answers on the page explain that all four capsules are needed to reach the 350 mg serving amount. Other questions ask about long-term use, and a reviewer answer describes taking one capsule nightly for years.

Product Focus: SleepAlso covers:BrainMuscles and joints
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$16

Study, Trial or Testing Result Summary

MembersHuman studies

6 of these 57 human studies gave the ingredient by drip, not by mouth.

Magnesium is the main ingredient, at a dose the 226 milligrams that in one trial, but its sleep evidence is and . A pooled analysis of three trials in 151 older adults with insomnia found people fell asleep about 17 minutes , with in total sleep, and the evidence was quality. …

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Review Totals and Summary

Members29,266 reviews
29,266 reviews · IHerb 29,229 · Swanson Vitamins 37

KAL Magnesium Glycinate capsules have garnered feedback across stores, with approximately 29266 ratings. Of the detailed reviews, a () are favorable, indicating a generally customer experience with this supplement. …

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Biohacker Summary

MembersWhat our biohacker panel says

Sleep is the main reason, with suggesting it before bed (one says 90 minutes to 2 hours ahead), and others cite blood pressure, stress, muscle recovery, bone and brain function. Forms vary: three name glycinate, while others prefer threonate, often 400 mg at night, and doses mentioned range from 300 mg before bed to 400 to 600 mg a day, with one aiming for about a gram. …

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RAL Summary

MembersThe tier and why

The tier rests on black pepper extract, a 5 mg absorption helper that was only tested for sleep with ashwagandha or curcumin, while the main ingredient, magnesium, has , certainty sleep evidence. …

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Nervous system, Musculoskeletal system. Combine with and possible side are for members.

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Supplement Facts

Magnesium 350 mg · BioPerine® Black Pepper Extract 5 mg
Supplement Facts
Serving Size 4 VegCaps
Servings Per Container 40
Amount Per Serving% Daily Value
Calories10
Magnesium (from Magnesium Bisglycinate)350 mg83%
BioPerine® Black Pepper Extract (Piper nigrum) (fruit)5 mg†
† Daily Value not established.

Other ingredients: Vegetable Cellulose Capsule, Magnesium Stearate, Cellulose and Silica.

Directions: Take 4 VegCaps daily with a meal or glass of water. Use only as directed.

Label source: The Vitamin Shoppe · Report a label change

Where to Buy

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Graded October 26, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.