NutriCology Magnesium Citrate 170 mg, 90 Vegetarian Capsules

What NutriCology Magnesium Citrate is

NutriCology Magnesium Citrate is magnesium in the citrate form in vegetarian capsules: each capsule has 170 mg of magnesium, 40% of the Daily Value, and the bottle holds 90 capsules (90 servings). The label says 1 capsule one to three times daily between meals: the bottle lasts 90 days at 1 capsule a day and 30 days at 3 (our math). It costs $17.50, about $0.19 per capsule (our math). Free shipping in Puerto Rico on orders from $35, or pick it up at our store in Galería Paseos.

The front says «Pure, Well-Absorbed Magnesium*» and «Hypoallergenic». The side says: «Magnesium in the citrate form.»

*This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Its ingredients and what they do in the body

Magnesium, 170 mg per capsule (40% of the Daily Value), as magnesium citrate. According to MedlinePlus, the medical encyclopedia of the U.S. National Library of Medicine, in its “Magnesium in diet” page (reviewed January 2025), magnesium is needed for more than 300 biochemical reactions in the body: it helps maintain normal nerve and muscle function, supports a healthy immune system, helps bones remain strong and aids in the production of energy and protein. The same source explains that most dietary magnesium comes from dark green, leafy vegetables, and that fruits such as bananas and avocados, nuts such as almonds, peas and beans (legumes), seeds and whole grains also provide it. In this bottle each capsule has 170 mg; at 3 capsules a day, the most the label gives, that is 510 mg (our math).

Citrate: the form the magnesium comes in. The magnesium in a supplement is always bound to another substance; here it is bound to citric acid, as the panel («as Magnesium Citrate») and the side of the bottle («Magnesium in the citrate form.») show.

What sets it apart:

In a study by Lindberg and colleagues in the Journal of the American College of Nutrition (1990), magnesium citrate dissolved much better than magnesium oxide, even in water, and in healthy volunteers it raised urinary magnesium more after it was taken, a sign that more was absorbed. The study used a single 25 mmol magnesium load, not the 170 mg capsule in this bottle, and it does not measure any health outcome.

The other ingredients. The capsule is made of hydroxypropyl methylcellulose, a plant-based material, which is why the bottle says «90 vegetarian capsules». It also has magnesium stearate, silicon dioxide and microcrystalline cellulose.

These explanations describe normal body functions; they are not results measured with this product.

Label facts

* Percent Daily Values are based on a 2,000 calorie diet.

• Contents: 90 vegetarian capsules; serving size 1 capsule, 90 servings per container.
• Other ingredients: hydroxypropyl methylcellulose, magnesium stearate, silicon dioxide and microcrystalline cellulose.
• Made for: NutriCology, Salt Lake City, UT 84115, USA. Barcode 713947502406.

How to take it

As a dietary supplement, 1 capsule one to three times daily between meals, or as directed by a healthcare practitioner. The 90-capsule bottle lasts 90 days at 1 capsule a day and 30 days at 3 (our math).

Warnings

• High doses of magnesium can have a laxative effect.
• Contraindicated with use of aluminum containing drugs.
• Store in a cool, dry place, tightly capped.

Frequently asked questions

How much magnesium is in each capsule?

170 mg of magnesium as magnesium citrate, 40% of the Daily Value. The serving size is 1 capsule and the bottle holds 90.

How do you take it and how long does the bottle last?

1 capsule one to three times daily between meals, per the label. The 90-capsule bottle lasts 90 days at 1 a day and 30 days at 3 (our math).

Can it have a laxative effect?

Yes: the label says high doses of magnesium can have a laxative effect.

What should it not be used with?

With aluminum-containing drugs: the label says it is contraindicated with their use.

Are the capsules vegetarian?

Yes. The bottle says «90 vegetarian capsules» and the capsule is made of hydroxypropyl methylcellulose, a plant-based material.

Where can I buy NutriCology magnesium citrate in Puerto Rico and how much is it?

At Borinquen Natural, for $17.50 per 90-capsule bottle, about $0.19 per capsule (our math). Free shipping in Puerto Rico on orders from $35, or pick it up at our store in Galería Paseos.

More minerals

See more options in Mineral Based Products.