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Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorized distributors.Show more
4.8
Based on 1,585 ratings
1,384
153
35
5
8
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What customers say
Customers consistently praise the product for its high quality, effective ingredients, and noticeable health benefits. Many users report improvements in sleep, muscle cramps, energy levels, and overall wellness after using the magnesium and potassium supplement. The capsules are noted for being easy to swallow without any unpleasant aftertaste or stomach issues. Customers appreciate the convenient packaging and find the dosage appropriate for their needs. The brand is recognized as reliable and affordable, with several customers expressing intent to repurchase. Some users specifically mention positive effects on conditions like leg cramps during sleep and muscle recovery post-exercise. While most feedback is positive, a few users note a slightly bitter taste but still recommend the product for its health benefits.
Review highlights
Customer reviews (1,531)
Product reviews solely reflect the views and opinions expressed by the contributors and not those of iHerb. iHerb does not verify or endorse any claims made in these reviews. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
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Reviews from Ireland
Reviewer Country
English
Translated reviews
iHerbCustomer
Posted on Nov 7, 2025
Ireland
62
0
1
3
Reliable Electrolyte Support
Verified purchase
Easy to swallow and effective for muscle recovery and hydration. Helps reduce cramps and maintain balanced energy throughout the day.
iHerb customer
Posted on Aug 30, 2025
Ireland
2
0
0
1
A Simple and Effective Way to Support My Electrolyte Balance
Verified purchase
I have tried Nutricost's Potassium + Magnesium supplement as part of my daily routine for the last six months, and it has become a reliable staple for my overall wellness. My main goals were to support healthy muscle function, reduce occasional nighttime leg cramps, and ensure I was getting enough of these crucial electrolytes, especially on days when my diet wasn't perfect or after a sweaty workout. I have tried other electrolyte products in the past, but many are packed with sugar or come as powders that are inconvenient for travel. I have tried taking two capsules with a large glass of water both in the morning and with my evening meal. I found that this consistent routine worked best for me. The capsules are a standard size—not too large—and I haven't experienced any stomach discomfort. The most noticeable benefit for me has been a significant reduction in those frustrating leg cramps that would sometimes wake me up at night. I also feel like my muscles recover more quickly after exercise. The value is a major plus. I have tried to be consistent with supplements in the past, but the cost of some brands made it difficult. Getting a 240-capsule bottle (a 120-day supply for me) at this price point is fantastic and makes it easy to stay consistent. It's important to note that I have tried this supplement alongside a balanced diet and proper hydration—it's not a magic pill, but it effectively fills in the nutritional gaps. As always, it's wise to consult with a doctor before starting any new supplement, especially with minerals like potassium. For me, this has been a simple, effective, and affordable way to support my health.
iHerbCustomer
Silver
Posted on Nov 27, 2024
Italy
299
3
0
103
The best!
Verified purchase
First of all I love magnesium and potassium because it will fix all my body issues and I feel amazing taking it I will buy it forever because the price isn’t too high and the quality is top notch There are so many benefits and reasons to take magnesium and the fact that has potassium will help balance everything
Robert
Posted on Jun 1, 2024
United States
356
85
54
924
Nutricost Potassium + Magnesium 240 Caps
Verified purchase
Magnesium is essential for roughly 300 body functions, and yet somewhere around 60% of Americans are deficient in magnesium. Not good. Potassium is an important mineral that many people aren’t getting enough of either. It plays a crucial role in blood pressure control and kidney function. It stops my muscle cramps dead in their track. Nutricost Potassium + Magnesium is good value and the right dosage. Wish the product had a higher dosage of Magnesium.
iHerb customer
Posted on Nov 28, 2025
Philippines
28
0
0
1
Verified purchase
I’ve been taking this Vitamin C supplement from iHerb for a few weeks now, and I’m really impressed with the quality. The potency feels just right — not too strong but effective enough to support daily needs. The size of the capsules is easy to swallow, and the dosage per serving makes it simple to follow without confusion. I’ve noticed real benefits for my immune system, and I appreciate the added antioxidants, which give an extra boost for overall wellness. The taste is mild with no unpleasant aftertaste, which is a big plus compared to other brands. The effect has been noticeable — I feel less fatigued and more energetic throughout the day. The package is sturdy and well-sealed, keeping the product fresh. I like that the formula is suitable for a wide range of ages, making it a versatile option for the family. The ingredients are clean and clearly listed, which gives me confidence in what I’m taking. Overall, a great Vitamin C supplement that balances effectiveness with convenience!
iHerb customer
Posted on Nov 28, 2025
Philippines
30
0
0
1
Verified purchase
This is one of the best vitamin C supplements I've tried! The absorption is noticeably better thanks to the liposomal form, and it's very gentle on the stomach-no discomfort or acidity at all. I felt a clear boost in my immunity after just a few days of use. The antioxidant benefits are real, and | love that it's high quality with clean ingredients. The taste is surprisingly pleasant, and the individual packets are super convenient for travel. Great mg dosage and well thought-out package size. Highly recommend!
nazemtukan
Silver
Posted on Nov 27, 2025
Israel
175
0
2
78
Great!
Verified purchase
This is one of the best vitamin C supplements I've tried! The absorption is noticeably better thanks to the liposomal form, and it's very gentle on the stomach—no discomfort or acidity at all. I felt a clear boost in my immunity after just a few days of use. The antioxidant benefits are real, and I love that it's high quality with clean ingredients. The taste is surprisingly pleasant, and the individual packets are super convenient for travel. Great mg dosage and well thought-out package size. Highly recommend!|
iHerb customer
Posted on Nov 22, 2025
Philippines
55
0
0
3
Verified purchase
This is one of the best vitamin C supplements I've tried! The absorption is noticeably better thanks to the liposomal form, and it's very gentle on the stomach—no discomfort or acidity at all. I felt a clear boost in my immunity after just a few days of use. The antioxidant benefits are real, and I love that it's high quality with clean ingredients. The taste is surprisingly pleasant, and the individual packets are super convenient for travel. Great mg dosage and well thought-out package size. Highly recommend!|
iHerbCustomer
Silver
Posted on Dec 16, 2025
United Kingdom (UK)
127
0
2
5
Acceptable Convenient Supplement
Verified purchase
Not the highest dose but acceptable convenient supplement. Nice to have around and take daily. Importantly not an nasty Oxide form of Magnesium.
iHerb customer
Posted on Nov 28, 2025
China
10
0
0
0
很好！
Verified purchase
I have to buy a lot of things every month, so I specially made a template. When I read this paragraph, it shows that I am very satisfied with this product. If the product is not good, I will also spend some effort to comment on it.