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NOW Foods

NOW Foods Supplements, Magnesium 400 mg, Enzyme Function*, Nervous System Support*, 180 Veg Capsules

Based on 13,745 reviews
Condition: New
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$13.90
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Availability: In Stock.
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Arrives Friday, Nov 13
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At a glance

Condition
New
Size
180 Count (Pack of 1)
Dimensions
2.81 x 2.81 x 5.13 in; 6.35 oz
Weight
0.18 kg
Item Form
Capsule
Flavor
Unflavored
Product Benefits
Nervous System Health

Features 5

  • SUPPORTS ENERGY PRODUCTION: Magnesium is a mineral that is critical for energy production and metabolism, muscle contraction, nerve impulse transmission, and bone mineralization.
  • CRITICAL FOR ENZYME FUNCTION: It is a required cofactor for an estimated 300 enzymes. Among the reactions catalyzed by these enzymes are fatty acid synthesis, protein synthesis, and glucose metabolism.
  • CLASSIFICATIONS/CERTIFICATIONS: Kosher, Vegan, Soy Free, Keto Friendly, Non-GMO, Halal
  • GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).

Description

Magnesium is a mineral that is critical for energy production and metabolism, muscle contraction, nerve impulse transmission, and bone mineralization. It is a required cofactor for an estimated 300 enzymes. Among the reactions catalyzed by these enzymes are fatty acid synthesis, protein synthesis, and glucose metabolism. Magnesium status is also important for regulation of calcium balance through its effects on the parathyroid gland. Natural color variation may occur in this product.

Specs 19

Product Dimensions 2.81 x 2.81 x 5.13 inches; 6.35 ounces
Item model number 1283
Manufacturer NOW Sports - Nutrition and Wellness
Item Form Capsule
Primary Supplement Type Magnesium
Flavor Unflavored
Product Benefits Nervous System Health
Diet Type Halal, Keto, Kosher, Vegan, Vegetarian

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Nov 13

This item is non-returnable:

Non-returnable due to Food safety reasons

View our full returns policy here.

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Top Amazon Reviews

Very effective and well tolerated
Size: 180 Count (Pack of 1)
Very good magnesium supplement. It has helped me relax and improve my sleep. It did not cause stomach discomfort and is easy to take. Great value for the price.
Reviewed in the United States on January 16, 2026 by Paloma Michel Castillo Mateo
Great Quality Magnesium — Gentle, Effective, and Clean Formula
Size: 180 Count (Pack of 1)
I’ve been using this NOW Foods Magnesium 400mg supplement regularly, and it’s one I keep on hand. It’s helped noticeably with muscle tension, sleep quality, and stress levels, especially during busy or high-stress weeks. I also take it to support nervous system function and occasional leg cramps, and it’s made a clear difference. What I really like is that it’s a blend of magnesium forms, not just one type. This helps with better absorption and effectiveness, and it feels much gentler on my stomach than other magnesium supplements I’ve tried in the past. The capsules are veggie-based, which is a big plus if you’re avoiding gelatin, and the ingredient list is clean, no unnecessary fillers, artificial colors, or preservatives. The 180-count bottle is a great value and lasts a long time, even if you're taking two capsules a day. If you're looking for a high-quality, plant-based magnesium that’s easy on digestion and actually works, I’d definitely recommend this one. ... show more
Reviewed in the United States on July 29, 2025 by Denisse Villar
alta concentracion
Size: 180 Count (Pack of 1)
The product is good quality with good magnesium concentration I now stay more relaxed and focused and sleep very well.
Reviewed in the United States on February 21, 2026 by Yennifer
easy to swallow capsules, works well enough to help me drift off to sleep
Size: 180 Count (Pack of 1)
Pretty good. I use this to help me sleep. I have a preferred brand, but the price doubled recently and I dont want to reward that. But that one is still the best for me, so I may have to shell out the money anyway. But in mean time I will use this up. As with any magnesium, unless it expressly states what the elemental magnesium (non chelated) amount is, you can figure that it has about 1/10 of what is listed. While some magnesium chelates absorb better than others, and some have different functions than others, it really comes down to what works for you. Try different styles, brands. If you are new to mag supplementation, start low and slow. I use it at night as it makes me a sleepy. Some more than others. I'd consider this brand again if I cant find (or afford) my preferred brand. ... show more
Reviewed in the United States on May 28, 2021 by Precise Disarray
Can't live without
Size: 180 Count (Pack of 1)
I recently started taking NOW Supplements Magnesium 400 mg, and I have been thoroughly impressed with the positive impact it has had on my overall health and well-being. This magnesium supplement offers several noteworthy benefits. First and foremost, the dosage of 400 mg per capsule is ideal for ensuring that I meet my daily magnesium needs. Magnesium is essential for various bodily functions, including enzyme function and nervous system support. This supplement provides a convenient and reliable way to ensure I get an adequate intake of this crucial mineral. The fact that these capsules are vegetarian/vegan is a plus for those who prefer plant-based supplements. NOW Supplements' commitment to quality is evident, and I appreciate the absence of common allergens like wheat, gluten, soy, and dairy in their products. Since incorporating NOW Supplements Magnesium 400 mg into my daily regimen, I've noticed several positive changes. My sleep quality has improved, and I wake up feeling more rested and refreshed. I've also experienced reduced muscle cramps, and my overall stress levels seem better managed. The 180-veg capsule container offers a generous supply that lasts for months, making it a cost-effective option. One thing to note is that magnesium supplements can have a mild laxative effect on some individuals. It's important to follow the recommended dosage and adjust as needed based on personal tolerance. In summary, NOW Supplements Magnesium 400 mg is a high-quality and effective supplement for anyone looking to support enzyme function, nervous system health, and overall well-being. It has become a staple in my daily routine, and I highly recommend it to others seeking the benefits of magnesium supplementation. Whether you're an athlete looking to support muscle function or simply seeking better sleep and stress management, this supplement is a great choice. ... show more
Reviewed in the United States on September 6, 2023 by Hunter bottoms
Happy customer
Size: 180 Count (Pack of 1)
An absolutely essential nutrient. I have been buying this product for many years I have been happy with its quality.
Reviewed in the United States on March 9, 2026 by Phil L.
Love These Magnesium Supplements! - 400mg
Size: 180 Count (Pack of 1)
I rarely leave reviews, but I felt compelled to write one for this product because it has truly impressed me. From the moment it arrived, I could tell it was well-made and of high quality. The packaging was secure, and everything was neatly arranged, which was a great start. What really stood out to me was how easy it was to use. Whether you're familiar with products like this or it's your first time, you'll have no problem figuring it out. The setup was quick, and it worked exactly as described. I’ve been using it consistently since it arrived, and it hasn’t let me down once. The performance is outstanding. It delivers exactly what you need and more. One thing I particularly appreciate is how reliable and efficient it is. It has quickly become something I reach for regularly, and I can already tell it’s built to last. Durability is another major plus. It feels sturdy and well-constructed, so I have no concerns about it holding up over time. I’ve accidentally put it to the test a couple of times, and it has proven to be tough and long-lasting. For the price, I couldn’t ask for more. I’ve seen similar products that cost much more but don’t offer the same level of performance or reliability. This one strikes the perfect balance between affordability and quality. Customer service has also been top-notch. The company clearly stands behind their product and is available to answer any questions you might have. It’s always great to know there’s support available if you need it. In conclusion, I’m extremely happy with this purchase. It has exceeded my expectations in every way, and I can confidently recommend it to anyone. Whether you’re looking for something practical, reliable, or just a great value, this product is the perfect choice. I’m sure it will serve you well for a long time. ... show more
Reviewed in the United States on October 29, 2024 by Jeremy Foint
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