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Customer reviews

4.6 out of 5 stars
4.6 out of 5
3,106 global ratings
5 star
79%
4 star
12%
3 star
6%
2 star
1%
1 star
2%
NOW Supplements, Magtein™ with patented form of Magnesium (Mg), Cognitive Support*, 90 Veg Capsules

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

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Top positive review

All positive reviews›
Brian Parks
5.0 out of 5 starsSo this is what no fatigue is like, I like it
Reviewed in the United States on September 14, 2018
Ever since I was diagnosed with inattentive ADHD in 2007 the standard medication for the condition has helped a lot with improved focus but left me with a lot of fatigue also. Lack of meaningful REM.

About 20 days ago I stated taking magnesium L-threonate. NOW Magtein, 90 Veg Capsules was the lowest priced I could find. I doubt that the higher priced ones are any different. The company that licenses Magtein can't allow the formula to vary brand to brand.

I did some research and found many articles that suggested 500mg 3 times a day. 1 at mid-day and 2 an hour before sleep. Help with sleep is one of it's claims to fame. Who am I to argue? REM is my issue but becoming unconscious has not been a problem for a while. I was wide awake till 3 AM! After about 3 hours I was wide awake again. But I didn't feel any tiredness or fatigue all day. Or the next day. After a few days I saw other lack of sleep issues creep in. Remembering names and certain words became difficult. Diving in; to figure out something even a little complex just wasn't happening. A different thing from focus, that has been great.

Probably just my metabolism but it seems that a little trial and error to find what works best for me was called for. I backed off and had one capsule with morning meds. One at around 2 PM. The third at around 6 or 8. But I had the same problem. Up till 3 am and then 3 hours of sleep. Currently one cap first thing. If I have things to do, another in the afternoon.
Going with the adage "the smallest effective dose is the most effective dose" for now.

I have noticed another effect or side effect that I haven't found many articles about. With increased neural activity I am more aggressive. Less Libido at the same time. Not a good combination for a single guy at any age. It hasn't been a problem so far but I am doing things that are unusual for me. e.g. Talking too much in social situations when I am usually quiet. Catty and gossipy when I don't really approve of that in others. Something to take up with the counselor I guess. The results may prove to be good so I'll hold off judgement.
A couple of days I had headaches so tested my blood pressure. It was a little high. I'll keep monitoring it.

Mostly I am very pleased to be up and doing things again. Focus and getting things done is good.
Read more
205 people found this helpful

Top critical review

All critical reviews›
Veronique
1.0 out of 5 starsDid not like how it made me feel
Reviewed in the United States on January 8, 2019
I have often found Magnesium Glycinate to be helpful at bringing on relaxation and sleep at night, and so after reading about it and many of the positive reviews I assumed that Mag Threonate would work even better. I started with just one capsule 1 hour before bedtime, to be safe. These supplements feel very strong. I had more trouble than usual falling asleep and felt odd and jumpy rather than relaxed. The next morning I felt almost like I had double vision and also a bit edgy for the first few hours of the day- maybe this is what feels like mental sharpness to some of the other reviewers. Unfortunately, not for me, will not use again.
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97 people found this helpful

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From the United States

Brian Parks
5.0 out of 5 stars So this is what no fatigue is like, I like it
Reviewed in the United States on September 14, 2018
Verified Purchase
Ever since I was diagnosed with inattentive ADHD in 2007 the standard medication for the condition has helped a lot with improved focus but left me with a lot of fatigue also. Lack of meaningful REM.

About 20 days ago I stated taking magnesium L-threonate. NOW Magtein, 90 Veg Capsules was the lowest priced I could find. I doubt that the higher priced ones are any different. The company that licenses Magtein can't allow the formula to vary brand to brand.

I did some research and found many articles that suggested 500mg 3 times a day. 1 at mid-day and 2 an hour before sleep. Help with sleep is one of it's claims to fame. Who am I to argue? REM is my issue but becoming unconscious has not been a problem for a while. I was wide awake till 3 AM! After about 3 hours I was wide awake again. But I didn't feel any tiredness or fatigue all day. Or the next day. After a few days I saw other lack of sleep issues creep in. Remembering names and certain words became difficult. Diving in; to figure out something even a little complex just wasn't happening. A different thing from focus, that has been great.

Probably just my metabolism but it seems that a little trial and error to find what works best for me was called for. I backed off and had one capsule with morning meds. One at around 2 PM. The third at around 6 or 8. But I had the same problem. Up till 3 am and then 3 hours of sleep. Currently one cap first thing. If I have things to do, another in the afternoon.
Going with the adage "the smallest effective dose is the most effective dose" for now.

I have noticed another effect or side effect that I haven't found many articles about. With increased neural activity I am more aggressive. Less Libido at the same time. Not a good combination for a single guy at any age. It hasn't been a problem so far but I am doing things that are unusual for me. e.g. Talking too much in social situations when I am usually quiet. Catty and gossipy when I don't really approve of that in others. Something to take up with the counselor I guess. The results may prove to be good so I'll hold off judgement.
A couple of days I had headaches so tested my blood pressure. It was a little high. I'll keep monitoring it.

Mostly I am very pleased to be up and doing things again. Focus and getting things done is good.
205 people found this helpful
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Bev Birdsong
5.0 out of 5 stars This supplement changed my life.
Reviewed in the United States on February 15, 2019
Verified Purchase
I never write reviews, but for this product, I must. Magtein has changed my life. Before I started using it, I had unbearable brain fog, I could not concentrate on my work, and I was so tired by the middle of the afternoon that it was very difficult to finish my work day. The very next day after the night of my first dose, I noticed an immediate difference. I can work all day long at a quick pace like I used to be able to before the brain fog set in so bad. I can concentrate and remember what I am doing, and recall information like normal again. I also have energy all day long that lasts into the evening. I am sleeping better, I certainly fall asleep faster, and I wake up refreshed. There are no unpleasant side effects to Magtein. Magtein is magnesium threonate. Unlike magnesium citrate, Magtein does not have a laxative effect at all. I have been taking it about 2 1/2 weeks.
154 people found this helpful
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Karen D. Kushin
5.0 out of 5 stars Sleep! Finally!!!!!
Reviewed in the United States on September 5, 2018
Verified Purchase
I only started taking this a week ago and it’s already changed my life!! Years into decades of insomnia.....cured! I tried everything including benzodiazepines and they didn’t come close to this lifesaver. I take it as directed....one in the afternoon and 2 an hour before bed and boom....when I get up to use the bathroom I can get right back to sleep. It seems to have quieted my racing mind as I gently fall back asleep instead of the decades before where I would feel the racing thoughts. It works!!! My energy level all day now is amazing and I feel 40 again instead of 75. (I’m 64...lol) Thank you Magtein!!
178 people found this helpful
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Veronique
1.0 out of 5 stars Did not like how it made me feel
Reviewed in the United States on January 8, 2019
Verified Purchase
I have often found Magnesium Glycinate to be helpful at bringing on relaxation and sleep at night, and so after reading about it and many of the positive reviews I assumed that Mag Threonate would work even better. I started with just one capsule 1 hour before bedtime, to be safe. These supplements feel very strong. I had more trouble than usual falling asleep and felt odd and jumpy rather than relaxed. The next morning I felt almost like I had double vision and also a bit edgy for the first few hours of the day- maybe this is what feels like mental sharpness to some of the other reviewers. Unfortunately, not for me, will not use again.
97 people found this helpful
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Eugene
1.0 out of 5 stars IT CAN POTENTIALLY CAUSE REALLY BAD ANXIETY, DELUSIONAL THOUGHTS, IRRATIONAL FEARS, ETC
Reviewed in the United States on June 6, 2021
Verified Purchase
I've tried other forms of magnesium such as Mg Citrate and Mg Glycinate for over a year and had no noticeable problems with them. However, Mg Theronate is a very different story for me. The reason why I even take Mg is to be able to fall asleep easier and I just wanted to test out a different type of Mg, because why not?

And when I tried this form of Mg, I didn't really think too much about it, and felt that it's only magnesium..what harm could it do? Well...it could do a lot..and the scary thing is that for me, the symptoms came on very gradually, so it took a while for me to pinpoint that this form of Mg was the cause. The thing is, it did work well for me in falling asleep, but it had some long-term side effects you need to look out for.

The first red flag that I noticed was that I woke up in the middle of the night with a PANIC ATTACK - The only way I could describe this was it was an insane onset of fear that would not go away for 20-30 minutes. After this episode, I started to experience increased anxiety during the day, and occasional panic attacks throughout the week.

After a while, I started to feel constant fear that would not go away, and I convinced myself that I started developing a psychiatric illness. Not only I was experiencing increased anxiety and irrational fears, but my perception of reality also started to feel like a dream (very hazy/cloudy)..it was F***ing scary. I really thought I was becoming schizophrenic and that I should go see a doctor. But after I started to think about what could be causing these symptoms, I realized Mg Threonate was the only supplement I was taking, and so when I stopped taking it, I instantly felt better the next day - And it took about 3 weeks to finally feel like myself again.

Please be careful with this stuff. It may work for some people, but for those that don't need it like me, it can potentially be a dangerous supplement to take since this Mg is going straight to your brain.
38 people found this helpful
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barbara willenberg
1.0 out of 5 stars Lab test show not what what they say it is.
Reviewed in the United States on April 15, 2019
Verified Purchase
Using Quest Labs we tested NOW mg-L- Th, one month at 2 gr daily, no change in blood levels, one month 4grs daily, no change, then one month at 6grs daily, no change. Switched brands and in two weeks her blood and urine showed positive numbers. What can I say as the science speaks for its self. We are using Doc. Dale Bredesen's prodacal from "The End of Alzheimers" to reverse my wife's dementia..having the real ingredients is critical!
65 people found this helpful
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Eric In Beaverton
5.0 out of 5 stars Sleep miracle if you are older or stressed.
Reviewed in the United States on September 13, 2017
Verified Purchase
I tried Melatonin and other natural sleep aids. By age 60 they just stopped working. I wake up in the middle of the night and have trouble getting back to sleep. No more! Not only does this knock me out, once again I have trouble getting up. If I go to bed late. I'm going to catch up eventually and get rested. I knew I had magnesium deficiency but this is a revelation.
115 people found this helpful
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Kindle Customer
5.0 out of 5 stars NOW Magtein
Reviewed in the United States on January 24, 2018
Verified Purchase
Excellent Product.....Fast Delivery .......Lowest Price on the Internet.......Will Buy From Again......... It took about a week and I found I was sleeping better ....... Eye blurriness had stopped......and best of all the Brain fog had gone away
82 people found this helpful
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tron
5.0 out of 5 stars Five Stars
Reviewed in the United States on December 23, 2017
Verified Purchase
This is the single most effective supplement I have taken for memory and for anything really. It really does work and recommend it everyone! My long term memory came rushing back at around one week of use. I have ADD and I am 55 years old and I have tried dozens and dozens of supplements for cognitive enhancement and overall general well being. After doubling the recommended dose I am able to focus enough to read without being distracted. I take 15 supplements and this is the only supplement I regard as having medicinal value and never miss a dose! FYI I took Adderall for 25 years and even though I don't have the drive and IQ points gain the ability to focus and not be distracted without side effects is worth it
68 people found this helpful
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KW
5.0 out of 5 stars Helps you function better when you don’t sleep enough
Reviewed in the United States on May 2, 2018
Verified Purchase
My sister in law recommended this product to me because of some research she was doing regarding ADD and while I can not personally recommend it for that, I noticed a huge difference in the way I function when I am not able to get more than four hours sleep.
If you follow the directions this bottle is a month supply.
52 people found this helpful
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