I dont understand dosage on label. How much Magnesium is in each capsule or a 3 capsule dose? 144mg? 2,000mg?

3 capsules contain 144 mg of magnesium, so you would need to take 9 capsules/day to get 100% of the RDA for Mg++. But, one typically gets a lot of Mg++ in a normal diet (google it).

Magtein is the only Magnesium supplement that will cross the blood brain barrier. therefore it has been purported to reduce brain age

Why is there a prop 65 cancer warning????

Please visit our website for more information on California's labeling law known as Proposition 65. https://www.nowfoods.com/now/nowledge/california-residents-proposition-65-warning-faqs

Does magnesium threate help with constipation

If you are looking for magnesium that will help you with constipation, you should order magnesium citrate. People have to make sure they drink enough the because the magnesium pulls a lot of fluid to the intestines. Therefore helping with constipation.

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NOW Foods Supplements, Magtein™ with patented form of Magnesium (Mg), Cognitive Support*, 90 Veg Capsules

Product ID: 7194709

Details

Brand
NOW Foods
Flavor
Unflavored
Item Form
Capsule
Primary Supplement Type
Magnesium
Unit Count
90 Count

🌙Supports natural, restorative sleep

🔬Patented Mg crosses blood-brain barrier

🧠2g Magnesium L-Threonate for brain boost

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Details

Brand
NOW Foods
Flavor
Unflavored
Item Form
Capsule

Description

🧩 Unlock your brain’s full potential—because your mind deserves the best!

TRUSTED LEGACY - From NOW Foods, a family-owned pioneer since 1968, with 7,000+ 5-star reviews
SLEEP LIKE A PRO - Promotes relaxed mood and deeper, uninterrupted sleep cycles for next-day alertness
CLEAN CONSCIOUS - Vegan, non-GMO, allergen-free, and crafted with globally sourced ingredients in the USA
BRAIN READY MAGNESIUM - Patented formula designed to penetrate the blood-brain barrier for maximum neural impact
COGNITIVE CLARITY DELIVERED - 2 grams of clinically studied Magtein® magnesium to enhance memory and focus*

NOW Foods Magtein® delivers 2 grams of patented Magnesium L-Threonate per serving, uniquely formulated to cross the blood-brain barrier and support cognitive function, memory, and natural sleep. This vegan, allergen-free supplement is made in the USA by a trusted family-owned brand with decades of expertise, helping busy professionals optimize brain health and mental clarity daily.

Specifications

ASIN	B00JEZQAFG
Age Range Description	Adult
Allergen Information	Dairy Free, Egg Free, Non-GMO, Nut Free, Soy Free
Best Sellers Rank	#2,150 in Health & Household ( See Top 100 in Health & Household ) #39 in Blended Vitamin & Mineral Supplements #418 in Sales & Deals
Brand	NOW Foods
Brand Name	NOW Foods
Concentration	Magnesium 144mg/Magtein 2000mg
Customer Reviews	4.6 out of 5 stars 7,175 Reviews
Diet Type	Halal, Kosher, Vegan, Vegetarian
Flavor	Unflavored
Item Form	Capsule
Item Volume	0.2 Kilograms
Item Weight	667 Milligrams
Manufacturer	NOW Sports - Nutrition and Wellness
Manufacturer Part Number	P29995
Material Type Free	Egg Free, Gluten Free, Milk Free, Soy Free, Tree Nuts Free, Wheat Free
Model Number	2390
Number of Items	1
Primary Supplement Type	Magnesium
Product Benefits	Brain Health
Supplement Formulation	Multi-Supplement
UPC	733739023902
Unit Count	90 Count

Reviews

J**A

10.11.2025

J**W

27.09.2025

Y**R

4.10.2025

M**.

20.02.2026

T**R

14.01.2026

F**E

19.03.2026

J**E

29.03.2026

I**L

18.06.2025

W**A

27.12.2025

I**V

12.04.2024

R**R

28.05.2020

A**A

20.02.2025

P**I

25.01.2026

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