Magnesium is present in foods, like nuts, greens and whole grains--yet at least 80 percent of North Americans are deficient. Considering hectic lifestyles, dependence upon fast foods, nut allergies and chronic health conditions, it’s no wonder that society is falling short on the Recommended Daily Intake of about 450 milligrams per day of this mineral.
Magnesium is crucial for everything from muscle relaxation and nerve function to blood pressure regulation and stress resilience. However, not all magnesium supplements are created equal. Some forms, like pure magnesium oxide or magnesium citrate can cause digestive upset because a large portion of them remain unabsorbed.
That’s why we developed Pure Lab’s Magnesium Glycinate Fully Reacted 100 mg—a pure, highly bioavailable formula. This excipient-free product contains nothing but fully reacted magnesium glycinate, ensuring optimal absorption without the laxative effect.
Ideal for those with sensitive digestion or precise dosing needs, this formula supports relaxation, chronic pain management, and overall well-being—for adults and children 4 years and up.
Abbasi B, Kimiagar M, Sadeghniiat K, Shirazi MM, Hedayati M, Rashidkhani B. The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. J Res Med Sci. 2012;17(12):1161-1169.
Boyle NB, Lawton C, Dye L. The Effects of Magnesium Supplementation on Subjective Anxiety and Stress-A Systematic Review. Nutrients. 2017;9(5):429. Published 2017 Apr 26.
DiNicolantonio JJ, Liu J, O'Keefe JH. Magnesium for the prevention and treatment of cardiovascular disease. Open Heart. 2018;5(2):e000775. Published 2018 Jul 1.
Fathizadeh N, Ebrahimi E, Valiani M, Tavakoli N, Yar MH. Evaluating the effect of magnesium and magnesium plus vitamin B6 supplement on the severity of premenstrual syndrome. Iran J Nurs Midwifery Res. 2010;15(Suppl 1):401-405.
Firoz M, Graber M. Bioavailability of US commercial magnesium preparations. Magnes Res. 2001 Dec;14(4):257-62.
Hornyak M, Voderholzer U, Hohagen F, Berger M, Riemann D. Magnesium therapy for periodic leg movements-related insomnia and restless legs syndrome: an open pilot study. Sleep. 1998;21(5):501-505.
Houston M. The role of magnesium in hypertension and cardiovascular disease. J Clin Hypertens (Greenwich). 2011;13(11):843-847.
Murakami K, Sasaki S, Okubo H, et al. Association between dietary fiber, water and magnesium intake and functional constipation among young Japanese women. Eur J Clin Nutr. 2007;61(5):616-622.
Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals. National Institutes of Health. Accessed October 25th, 2021.
Park R, Ho AM, Pickering G, Arendt-Nielsen L, Mohiuddin M, Gilron I. Efficacy and Safety of Magnesium for the Management of Chronic Pain in Adults: A Systematic Review. Anesth Analg. 2020;131(3):764-775.
Rosique-Esteban N, Guasch-Ferré M, Hernández-Alonso P, Salas-Salvadó J. Dietary Magnesium and Cardiovascular Disease: A Review with Emphasis in Epidemiological Studies. Nutrients. 2018;10(2):168. Published 2018 Feb 1.
Rude RK, Singer FR, Gruber HE. Skeletal and hormonal effects of magnesium deficiency. J Am Coll Nutr. 2009;28(2):131-141.
Schuette SA, Lashner BA, Janghorbani M. Bioavailability of magnesium diglycinate vs magnesium oxide in patients with ileal resection. JPEN J Parenter Enteral Nutr. 1994 Sep-Oct;18(5):430-5.
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Simmons D, Joshi S, Shaw J. Hypomagnesaemia is associated with diabetes: Not pre-diabetes, obesity or the metabolic syndrome. Diabetes Res Clin Pract. 2010;87(2):261-266.
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What is the difference between Pure Lab's Fully Reacted Magnesium Glycinate 100 mg Capsules and Pure Lab's Magnesium Glycinate 100 mg Capsules?
Answer: Our Fully Reacted Magnesium Glycinate 100 mg formulation contains only 100% reacted Magnesium Glycinate. This means one magnesium atom binds to two l-glycine molecules. The product contains no magnesium oxide, or any other ingredients inside the capsule. To compare, Pure Lab's Magnesium Glycinate 100 mg formula contains our original time-tested formulation of 70% magnesium glycinate and 30% magnesium oxide and l-glycine dry chelate blend.
When comparing Pure Lab’s Magnesium Glycinate 100 mg Capsules with Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules: which has higher bioavailability, and does this impact the risk of side effects?
Answer: Of our two 100 mg - potency products, our Fully Reacted Magnesium Glycinate 100 mg Capsules has a slightly higher bioavailability, and therefore, carries the lowest risk of experiencing loose stools.
Are Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules excipient-free?
Answer: Yes, Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules are excipient-free.
What are ‘excipients’?
Answer: “Excipients” refer to the inert, non-medicinal ingredients used in most natural health product and pharmaceuticals. Some of the more commonly used excipients act as binders, fillers, emulsifiers, sweeteners, flavours and stabilizers.
What does ‘excipient-free’ mean?
A product that is labeled “excipient-free” contains nothing but the therapeutic or medicinal ingredient(s) inside the container/capsule.
What are the advantages of being ‘excipient-free’?
Answer: There are several main advantages to making our Magnesium Glycinate Capsules excipient-free. For one, it means our capsules will be easier to swallow because they’re now smaller. An excipient-free product requires less space, since there are fewer ingredients in the capsule. Second, since some excipients are known to trigger reactions in sensitive individuals, an excipient-free product can be used by a larger number of people with greater peace of mind. Finally, since some excipients may hinder absorption, avoiding their use may enhance effectiveness.
Does the lack of excipients decrease the shelf life or quality of Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules?
Answer: No, the lack of excipients in our Fully Reacted Magnesium Glycinate 100 mg Capsules does not affect shelf life or quality.
Why aren’t all of your products excipient-free?
Answer: Our goal has always been to make products with as few non-medicinal ingredients as possible. New manufacturing processes have made it possible to produce an excipient-free magnesium glycinate. However, some natural health products cannot be made excipient-free without compromising quality as some excipients fulfil important roles in ensuring the therapeutic ingredient(s) can be dosed consistently in each capsule, thus staying therapeutic.
What’s the difference between Magnesium Glycinate and Magnesium Bisglycinate?
Answer: There is no difference. Magnesium naturally forms a bond with two glycine molecules, so the term “bisglycinate” is technically redundant. At Pure Lab Vitamins, we use the term Magnesium Glycinate to reflect clarity and scientific accuracy.
What is the difference between Magnesium Glycinate and Magnesium Oxide?
Answer: The key difference lies in structure, absorption, and how much elemental magnesium they provide. Magnesium Glycinate is a salt, where magnesium is bound to two molecules of the amino acid L-glycine. This form is highly absorbable, gentle on the stomach, and ideal for calming, sleep, pain and nervous system support. However, it’s a larger molecule—so it takes up more space in a capsule, meaning less elemental magnesium per capsule.
L-Glycine has several beneficial effects itself. It is calming to the nervous system and beneficial to the digestive tract and joints. L-glycine is one of the three building blocks of glutathione - our body’s most important antioxidant and cellular detox agent.
Magnesium Oxide is more compact and contains a higher percentage of elemental magnesium by weight. However, it has lower bioavailability and can cause digestive upset in some people. Oxide has no beneficial effects itself.
Should I use Magnesium Oxide or Magnesium Glycinate for constipation?
Answer: While Magnesium Oxide can provide quick relief from constipation due to its laxative effect, it's only about 30% absorbable, meaning most of it stays in the gut and passes through—giving short-term results without addressing the root cause.
Constipation is often a sign of magnesium deficiency. Using Magnesium Glycinate helps to replenish the body's magnesium stores, with up to 80% absorption into the bloodstream.
Magnesium oxide can provide symptom relief, but magnesium glycinate provides the long-term solution to the root cause of constipation. This supports not only gut motility but also the entire body—from muscles and nerves to bones and tissues. It takes a little longer to help with constipation, because all kinds of tissues in the body are eager to get nutrients--- but after a short while bowels get looser and regular. At this point you have not just fixed the symptom of magnesium deficiency, but you have fixed the whole problem.
Are Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules vegan?
Answer: Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules contain no animal-derived ingredients. The product is vegan.
Is Pure Lab Vitamins a Canadian company?
Answer: Yes, Pure Lab Vitamins is proudly Canadian owned and operated. Our products are made in Canada.
Are Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules made in a GMP-certified facility?
Answer: Yes, Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules are made in a GMP-certified facility.
Are Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules third-party tested?
Answer: Yes, Pure Lab’s Fully Reacted Magnesium Glycinate 100 mg Capsules are third-party tested. Our raw materials and finished goods are always tested by ISO-certified labs.
Magnesium Glycinate 100 mg
Magnesium Glycinate Fully Reacted 100 mg
Magnesium Glycinate 165 mg
Magnesium Glycinate Raspberry-Lemon Powder Mix
Magnesium Glycinate + L-Theanine
Magnesium Glycinate +Taurine +CoQ10
Carbonyl Iron 22.5 MG
Zinc Glycinate 23 MG
Copper Glycinate 1 MG
Selenomethionine 200 MCG
Calcium Hydroxyapatite
Bioactive B Complex
Bioactive Folic Acid 1 MG
Bioactive B6 (PYRIDOXAL-5-PHOSPHATE) 50 MG
Bioactive B12 1000 MCG
Bioactive B12 5000 MCG
NADH SR 20 MG
NADH + Ubiquinol
Vitamin K2-MK7 120 MCG
NAC 600 MG
L-THEANINE 250 MG
L-THEANINE SLOW RELEASE 200 MG
L-THEANINE CHEWABLES 125 MG
L-Glutamine Capsules
L-Glutamine Powder
Magnesium Butyrate
DIM
Vitamin C 1000 MG
Vitamin C Slow Release 1000MG
Vitamin C Powder
Vitamin D3 1000IU
Vitamin D3 2500IU
Vegan Vitamin D3 1000IU
Vegan Vitamin D3 2500IU
Slow Release Melatonin 10 MG.png)
Magnesium Glycinate +Melatonin
AlkaPure pH
ThyroPure
AdaptaPure
Rhodiola
UTI Pure 120s
UTI Pure Powder
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