Page 1 - Reviews - Source Naturals, Ultra-Mag™, 240 Tablets - iHerb
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Customer Ratings & Reviews

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4.9
Based on 54,748 ratings
49,850
3,643
867
208
180
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What customers say
Customers highly appreciate this magnesium supplement for its bioavailability and effectiveness in promoting overall wellness. The product contains multiple forms of magnesium, including glycinate and taurate, which are praised for their ability to support muscle relaxation, improve sleep quality, and reduce stress. Many users report feeling more relaxed and experiencing better sleep after incorporating it into their routine. The inclusion of Vitamin B6 is noted to enhance the benefits for heart, muscle, bone, brain, liver, and kidney health. Customers commend the brand for its value and quality ingredients packaged neatly in practical sizes. However, some mention that the tablets are large but can be broken or crushed if needed. While most reviews are positive about its effects on digestion and metabolism due to its role in activating over 300 enzymes, a few users experienced digestive discomfort at high doses. Overall satisfaction is high with many planning to repurchase despite occasional issues with tablet size or initial purchase regrets.
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English
Translated reviews
iHerbCustomer
Posted on Dec 20, 2025
United States
7
6
0
8
A great magnesium supplement for relaxation 💙✨
Verified purchase
I really like this Ultra-Mag! The quality and formula are impressive, and the benefits are noticeable 💊. I usually take it in the evening, and it helps relax my muscles and calm my nerves after a long day 😌💆‍♀️. The tablets are a convenient size, easy to take, and there’s no strong smell 👍. The packaging is practical, and I definitely feel a difference — my sleep has become more restful, and muscle tension happens less often 🌙😴. Overall, it’s a great choice if you want an effective and reliable magnesium supplement 💪💙✨
8687bccc-3cbe-4cf6-a086-e87f7e53ffb2
iHerbCustomer
Posted on Dec 20, 2025
Georgia
23
20
0
17
Magic magnesium
Verified purchase
I just ordered the 120-tablet version of Ultra-MAC Magnesium and the size of the bottle is noticeably larger — perfect for keeping on hand. The quantity inside is great for long-term use, and the ingredients are the same high-quality S.I.N.-1 magnesium blend (malate, aspartate, citrate). The benefit I love most is how it helps my muscle tension ease up, supports deeper sleep, and just keeps my overall recovery on track. Well worth the upgrade.
46a92049-afd3-4bf4-9430-28aad7aed24b
AlexanderFegerl
Posted on Sep 29, 2025
Austria
9
0
0
5
Best Magnesium at the moment!
Verified purchase
I take Magnesium on a daily basis since years (I also use it a lot in my private practice). Therefore I'm always looking for the best and most efficient products on the market. That specific product unifies top-magnesium components with Vitamin B6, which supports the energy production in the cell. So you get highest bio-availability. At the same time the price is absolutely second to none. My full endorsement!
Lexi
Silver
Posted on Mar 7, 2026
United States
177
0
9
52
Love it
Verified purchase
I have been using Source Naturals Ultra-Mag and it is good for me. The quality feels dependable, and the ingredient magnesium is a vital mineral that supports many functions in the body. The size of the tablets is manageable, and the package is simple to store. I noticed a clear benefit in joint comfort and muscle relaxation, along with better sleep. Magnesium also helps with hormone balance, which adds to the overall improvement I feel. The taste is mild, so it’s easy to take regularly without any problem.
G
Posted on Jan 29, 2026
United States
72
0
0
30
Good ingredients
Verified purchase
This is a pretty decent magnesium supplement that really helped with some joint and muscle pain I was experiencing. But the tablet size is huge and really hard to swallow do me. I thankfully found that this same company makes a magnesium malate supplement in a smaller form that is easier for me to take and has a wonderful effect.
iHerb customer
Posted on Jul 3, 2026
Azerbaijan
6
5
0
0
ultra mag
Verified purchase
A very high-quality magnesium combination! It contains different forms of magnesium such as citrate, malate, succinate, and glycinate. Thanks to this, it is very effective in terms of both muscle relaxation and nervous system support. It reduced my post-workout muscle soreness and significantly improved my sleep quality. Additionally, the presence of vitamin B6 strengthens absorption. The tablet size is a bit large, but it's easy to swallow with water. For those who want to use it regularly, the price/performance ratio is really excellent.
ee16588f-b376-4c25-8adc-1b8dab0ce948
ADecean10
Posted on Jun 16, 2026
Moldova, Republic of
10
0
0
0
Hi!
Verified purchase
This ultra magnesium is a very good supplement. I’ve using it for 2 years already. I like it and recommend it. Good size, no bad smell.
iHerb customer
Posted on May 17, 2026
Azerbaijan
5
5
0
0
ultramag
Verified purchase
High quality magnesium combination! It contains different forms of magnesium such as citrate, malate, succinate, glycinate. In this way, the effect is very good both in terms of muscle relaxation and nervous system support. It reduced my muscle pain after sports and significantly improved my sleep quality. As an extra, the presence of vitamin B6 in it also strengthens absorption. The size of the tablet is a little big, but it is easily swallowed with water. The price/performance ratio is really good for those who want to use it regularly.
6afa1c6a-2ef5-4931-a1f4-b49f37898291
iHerb customer
Posted on May 4, 2026
Azerbaijan
12
11
0
0
ultra mag
Verified purchase
High quality magnesium combination! It contains different forms of magnesium such as citrate, malate, succinate, glycinate. In this way, the effect is very good both in terms of muscle relaxation and nervous system support. It reduced my muscle pain after sports and significantly improved my sleep quality. As an extra, the presence of vitamin B6 in it also strengthens absorption. The size of the tablet is a little big, but it is easily swallowed with water. The price/performance ratio is really good for those who want to use it regularly. Would definitely recommend.
628e3159-b755-442e-9f7e-f587dd2f394d
iHerbCustomer
Silver
Posted on Apr 9, 2026
Thailand
136
0
1
13
My "go to" magnesium complex.
Verified purchase
Mix of different forms of magnesium. I have been buying it for years because it always delivers. Tablets aren't small but they are easy to swallow.