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Swanson Ultra

Magnesium L-Threonate

Magnesium L-Threonate

Item: SWU700

  • Breakthrough magnesium supplement—30 day supply!

  • Features Magtein, developed by MIT researchers

  • Only form of magnesium shown to cross the blood-brain barrier to promote optimum levels within the brain

90 Veg Caps
Veg Caps Size: 00

MSRP $45.49
Save 30%
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In Stock

Supplement Facts

Serving Size in the Afternoon 1 Veggie Capsule

Serving Size in the Evening 2 Veggie Capsules

  Amount Per Serving (Afternoon) % DV (Afternoon) Amount Per Serving (Evening) % DV (Evening)
Magnesium (from Magtein™ magnesium L-threonate) 48 mg 12% 96 mg 24%
Magtein™magnesium L-threonate 670 mg * 1.34 grams *

*Daily Value not established.

Other ingredients: Brown rice flour, hypromellose (vegetable capsule).

Suggested Use: As a dietary supplement, take one veggie capsule in the afternoon and two veggie capsules in the evening with water.

Magtein™ (Magnesium L-threonate) is a trademark of Magceutics, Inc. and is distributed exclusively by AIDP, Inc. Magtein™ is covered by U.S. patents #8,178,118 and #8,142,803 and patents pending.

Relative Size

Printable Size Guide

Shipping Weight

.27 lbs

  • Breakthrough magnesium supplement—30 day supply!

  • Features Magtein, developed by MIT researchers

  • Only form of magnesium shown to cross the blood-brain barrier to promote optimum levels within the brain

Magnesium L-Threonate featuring Magtein™ promotes healthy neuronal activity for the support of healthy cognitive function.* Traditional solutions for cognitive support involve stimulating the neurons to promote peak brain function. But over time, this can lead to burnout and have the opposite effect. New Magnesium L-Threonate works differently. Its patented form of magnesium nourishes the brain.* Preliminary research suggests great potential for this new magnesium—the only form known to readily cross the blood-brain barrier and function within the brain.* Protect the power of your mind today with Magnesium L-Threonate from Swanson Ultra.

Learn more about Magnesium L-Threonate in our Health Library.

Swanson Ultra Magnesium L-Threonate Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

Magnesium L-Threonate is rated 4.5 out of 5 by 41.
Rated 5 out of 5 by from Magnesium L-threonate Excellent source of magnesium--better than any other that I have tried.
Date published: 2017-09-03
Rated 5 out of 5 by from Product sneaks up on you I did not notice an improvement in my memory upon taking this but I did notice it when I stopped! I found it harder to recall information. I would definitely recommend this product by Swanson!
Date published: 2016-08-15
Rated 3 out of 5 by from not sure The verdict is still out on this product.
Date published: 2016-06-29
Rated 5 out of 5 by from Best quality and price I have purchased magesium l-threonate at other companies and have found this to be the most competitive price with good quality. This is a daily standard for me.
Date published: 2016-02-20
Rated 5 out of 5 by from Great Mag! This excellent product does just what my doctor said it would and is very effective. It does what it says it will do.
Date published: 2015-12-28
Rated 3 out of 5 by from A Little Early to Tell I bought this on the recommendation that it is less likely to cause diarrhea than other forms of Magnesium. The recommended dose is one in the afternoon and two at night. I can't take more than one per day without diarrhea. I'm not in favor of taking megadoses of anything anyway, and my diet is excellent, so it isn't a big deal. I do seem to have fewer leg cramps at night and I'm waiting for the mental clarity to kick in!
Date published: 2015-11-10
Rated 5 out of 5 by from Good combination Read an article about the combination Magnesium and L-Threonate. Since Swanson carried it I bought it and I am very satisfied with this product in comparison with the Magnesium Citrate, which gave me a loose stool!
Date published: 2015-11-01
Rated 5 out of 5 by from Great Brain Food Good way to get extra Magnesium, and improve your brain life!
Date published: 2015-07-27
Rated 5 out of 5 by from It really works!!! I love this product. It has really helped me
Date published: 2015-04-26
Rated 5 out of 5 by from Really Works This really works! I'm 67 and been taking it for about 2 years now. I recall names places and events from many years ago that I thought had forgotten. Also, helps with current events and processing information a lot faster. This is not snake oil and highly recommend it. I also noticed that I have very vivid, in color dreams and no problems sleeping. I usually take one in the morning and one at night. Best price is with Swansons!
Date published: 2014-07-26
Rated 5 out of 5 by from Remember...what? I still forget things, but I remember that I forgot them way sooner now. So I do still forget the grocery list, but I remember that I forgot it at the bottom of the stairs, instead of in the middle of the grocery store. Improvement, yes? I do like the dreams that are coming back. I can even remember some of them!
Date published: 2014-02-22
Rated 5 out of 5 by from Calms my nerves I take one of these at bedtime. Seems to calm me down the next day. I also take one 5-HTP and one Lemon Balm, Passion Flower, Skullcap Complex. Also, I made a powder of Melatonin, GABA, Tryptophan, DHEA, D3 and Suntheanine. I take about one capsule of that powder too. I tend to be hyper and this regimen mellows me out.
Date published: 2014-01-09
Rated 4 out of 5 by from Helpful This version of Magtein seems to have improved my memory, taken with Alpha-GPC daily. It's pricey, but I will continue, as long as I see benefit.
Date published: 2013-12-17
Rated 5 out of 5 by from Great product I have read about the importance of this mineral to my diet. I am happy with the quality.
Date published: 2013-11-22
Rated 4 out of 5 by from undecided I have been using this product for about three weeks. I am not sure if it is helping or not. I will use for a little while longer before making a final decision.
Date published: 2013-10-03
Rated 5 out of 5 by from Memory aid I have found a rapid improvement in my memory function since I started taking this, for about 5 weeks now. I certainly plan to continue.
Date published: 2013-09-09
Rated 4 out of 5 by from Even Mercola likes this After reading about Mg-L threonate on Mercola's site I decided to give it a try. Kinda expensive; but I imagine Swanson has the best prices. I take just two in the morning and I take melatonin at night. I do have pretty vivid dreams. I took a long hike after my morning dose. I felt more energized than normal. I like the pep I get after taking this.
Date published: 2013-08-06
Rated 5 out of 5 by from Unique Magnesium Magnesium L Threonate is the most unique form of magnesium. You must read the studies performed on this type of magnesium to appreciate its capabilities.
Date published: 2013-08-06
Rated 4 out of 5 by from Magnesium L-Theonate I've taken these for a few months now. Not working as fast as I'd like them to, but I do believe they are making some difference.
Date published: 2013-07-08
Rated 5 out of 5 by from FOCUSED! It crosses the blood brain barrier and keeps me focused!
Date published: 2013-05-16
Rated 5 out of 5 by from Magnesium Threonate in combination with Alpha GPC I was willing to give the Magnesium Threonate and Alpha GPC a serious try for a few weeks, and now I have been using them daily for several months. It took a couple weeks, but when they kicked in, the increased level of focus, energy, memory retention, and cognitive ability makes them worth the price, which by the way, is considerably cheaper with Swansons fine brand. Before, my stressful hospital job had frazzled my nerves and exausted my mind to the point where I was forgetting numbers I had seen moments before. (I would like to point out I am in my mid 50s'). Now, I'm doing serious studies and retaining (AND understanding!) things that I never understood before using these great supplements. I recommend them to the stressed- out worker, the student, and anyone else who wants a large improvement in their cognitive abilty. Whereas it is true, not all supplements will work for everyone, these have a growing reputation, and are well worth a try. Just allow them a few weeks to begin their good work, like any good supplement usually needs.. These supplements ROCK!
Date published: 2013-05-03
Rated 5 out of 5 by from Very effective Although the L-threonate form of magnesium is new on the market, it has impressive clinical evidence of it's ability to dramatically improve synaptic density and neuronal plasticity.
Date published: 2013-04-12
Rated 5 out of 5 by from Good value Good value on mag threonate. Taken at bedtime to help relax.
Date published: 2013-04-03
Rated 5 out of 5 by from thought I was losing my memory but also had shaky hands...turns out it was a deficiency...within days of starting on the caps I noticed a difference...after 2 months I can say that it's definitely working...thank goodness !
Date published: 2013-03-21
Rated 3 out of 5 by from Satisfaction This product, for me it would require several bottles to really test its efficacy toward its proposed goal & usefulness, I can't tell a difference. maybe the formula is Weak!
Date published: 2013-03-20
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