No Thanks

Your 10% Off Promo Code is on the Way! Thanks for signing up for emails.

You're now signed up to receive exclusive deals and savings opportunities!

Thanks again for connecting with us. Keep an eye on your inbox — your first coupon is on its way!

Thank You! This email address is already signed up

You are signed up for the following:

  • Offers
  • Recipes
  • E-Newsletter
  • Updates & Reminders

Thank you for your interest and be assured that you will continue to receive our emails at this address.

Look for your next communication from us within the next week.


We are having trouble processing your request.

Our apologies!

Please try again later.

Search Please enter an item number or keyword
Shop by
Do You
Need Help?

Swanson Ultra

Super-Strength Magnesium Citrate

Super-Strength Magnesium Citrate

Item: SWU339

  • Magnesium formula vital for healthy heart and nerves

  • High potency, body-preferred form

  • Bone-building mineral

225 mg 120 Tabs
Tabs Size: S

Retail $10.99
Save 27%
Coming Soon —  Get In Stock Alert

Supplement Facts

Serving Size 1 Tablet

  Amount Per Serving % Daily Value
Magnesium(from magnesium citrate) 225 mg 56%

Other ingredients: Stearic acid, croscarmellose sodium, hydroxypropyl methylcellulose, titanium dioxide, silica, magnesium silicate, triacetin, magnesium stearate, hydroxypropyl cellulose, carnauba wax.

Suggested Use: As a dietary supplement, take one tablet one to two times per day with water.

Relative Size

Printable Size Guide

Shipping Weight

.57 lbs

  • Magnesium formula vital for healthy heart and nerves

  • High potency, body-preferred form

  • Bone-building mineral

Do you get enough magnesium in your daily diet? Foods rich in this essential mineral include seeds, nuts, whole grains, dark green leafy vegetables and some fish. Magnesium is a key player in basic cellular function in the heart and nervous system, as well as the catalyst for enzyme reactions that create energy. It supports a smooth, efficient pump in the heart muscle just as it also works synergistically with calcium to build bone. Our citrate formulation delivers over half the body's RDA of magnesium in one, highly bioavailable tablet!

Terms and Ingredient Definitions

Swanson Ultra Super-Strength Magnesium Citrate Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

Super-Strength Magnesium Citrate is rated 4.6 out of 5 by 111.
Rated 5 out of 5 by from
Date published: 2017-05-16
Rated 5 out of 5 by from
Date published: 2017-01-23
Rated 5 out of 5 by from For good health I understand this mineral is needed by the body in at least 300 functions. Swanson's minerals have worked for me these many years.
Date published: 2016-10-20
Rated 5 out of 5 by from Best Bang for your Buck There are many forms of magnesium on the market, (from magnesium oxide-least absorbed to magnesium threonate-best absorbed). This magnesium gives you the best bank for your buck. It is well absorbed but not obscenely expensive. For me the difference in price for anything else is just not worth it. The savings allow for me to add expensive to produce vitamins like K2 to my regimen. Love magnesium!
Date published: 2016-10-03
Rated 3 out of 5 by from Pill is HUGE! I have been taking these for a long time... hating it all the while. It's not that they are bad in and of themselves. But the tablets are SO huge I can barely get them down. They often get "stuck", and won't go down, then causes discomfort until I can get them "washed" or pushed down with food or beverage. I've tried breaking them in half, but they end up just scratching my throat, as the pills are very dry. I read a review where the lady tried chewing it! It worked for her, so I am going to try that. Otherwise, I will have to find another brand.
Date published: 2016-04-30
Rated 5 out of 5 by from Excellent Product Very good Price
Date published: 2016-02-25
Rated 4 out of 5 by from Huge pill, but effective I seem to fall asleep faster when taking this supplement, however, as many others have said, it is a huge pill to swallow. I keep buying it, but it is a bear to get down. Don't know why they don't encapsulate this one.
Date published: 2015-12-30
Rated 4 out of 5 by from Good value This is a good product which I believe is more effective than magnesium oxide. The pills are huge and difficult to swallow, so I dissolve them in water.
Date published: 2015-12-30
Rated 5 out of 5 by from This is our standby This is the one, We've never bought any other magnesium since finding this one. It works, it's definitely absorbed, if you take too much, you'll know -so it's not hard to figure out your dose. We would never switch-been 7 or 8 yrs now.. Capsule is quite large, we find swallowing with a banana or food is best way, little issue then.
Date published: 2015-12-29
Rated 5 out of 5 by from One I can't do without Since it is estimated 80% of the people are deficient in Magnesium this is a great way to get a bioavailable form at a good price.
Date published: 2015-12-28
Rated 5 out of 5 by from
Date published: 2015-12-27
Rated 5 out of 5 by from Great
Date published: 2015-12-10
Rated 5 out of 5 by from gest value I was reluctant to purchase my supplements online until my doctor recommended Swanson. I was surprised at how fast my order was processed, and how quickly my package came. I've been talking my supplements now for several weeks and have nothing but good things to say.
Date published: 2015-11-16
Rated 2 out of 5 by from These are HUGE! These vitamins are HUGE, bigger than any vitamin that I have ever seen in my lifetime. Literally could barely swallow it whole. I did try one though, but it didn't seem to do anything for me. I used to take the liquid magnesium citrate which worked well (just tasted terrible), so I thought these would do the same. I tried one vitamin and it did nothing for me. Maybe it would take more than one vitamin to get the same results as the liquid, but I wouldn't want to swallow more than one of these at a time.
Date published: 2015-10-27
Rated 2 out of 5 by from loose stools It gives me very loose stools, even if I take with food.
Date published: 2015-10-12
Rated 5 out of 5 by from
Date published: 2015-09-13
Rated 5 out of 5 by from Easy to chew I like the high bioavailablity of this item, but what I haven't liked is how hard these rather large tablets are to swallow. These tablets only have a very thin coating which is not sufficient to ensure ease of swallowing. Then, I had an idea - try chewing them! Bingo! They are quite soft and have very little flavor. Problem solved! This is now my favorite magnesium supplement, especially when it's on sale.
Date published: 2015-09-09
Rated 5 out of 5 by from great find
Date published: 2015-08-07
Rated 3 out of 5 by from Very Hard To Swallow I take 2 tablets daily (AM-PM) and I find it helps me sleep sound and avoid night leg cramps. However swallowing this large pill is difficult and some times get stuck in my throat where I have to flush with Orange juice to get it fully down the "pipe". I have switched to a another brand with a slippery coating that aids swallowing with no gaging. This works for me
Date published: 2015-07-21
Rated 5 out of 5 by from Noticeable difference Taking magnesium has helped me in several ways. I felt a difference within one week. I did a lot of reading about my issues, and it sounded like the perfect fit for me. I was not disappointed, and plan to take this for the rest of my -much improved- life. As usual, the quality and value keep me ordering from anywhere else! My only negative comment would be that I have to break the large pills in half before I take them.
Date published: 2015-05-12
Rated 3 out of 5 by from would not buy again i bought these for the first time recently. they are very big pills, also they are not coated, therefore i have a difficult time trying to swallow them. i will have to return this product. i need pills that are coated-
Date published: 2015-04-26
Rated 5 out of 5 by from Good quality and value l was told to take magesium citrate supplements and these are excellent value.My only problem with them and l think it applies to all other magnesium supplements is that the tablets are so huge l have to cut them in half and then smooth down the sharp edges!l wish Swanson could make a smaller version!
Date published: 2015-04-09
Rated 1 out of 5 by from Impossible to swallow Impossible to swallow!!!!
Date published: 2014-12-05
Rated 5 out of 5 by from An Essential My husband and I are Senior Citizens and take this twice a day. We can really tell a difference it makes in many of our health issues. Knowing that our food is depleted of it's vitamins and minerals makes us more aware of the importance of supplementing. We also take a great Whole Food Multi-vitamin but find we still need the extra Magnesium. We're glad Swansons offers it at a price we can afford.
Date published: 2014-11-17
Rated 1 out of 5 by from Horse pills Not only are these pills impossible to swallow, but their magnesium effect is nil. I was so confident of Swanson products, I bought three giant bottles! gack. I'm throwing them out. I don't know anyone who could possibly swallow them, nor do I think they are effective.
Date published: 2014-09-13
  • y_2017, m_5, d_25, h_17
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_22, tr_89
  • loc_en_US, sid_SWU339, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_swansonhealth

Why Shop Swanson® Brands?

"With my personal 100% money-back satisfaction guarantee, you have nothing to lose and great savings to gain."

Lee Swanson, Founder of Swanson Health Products

Risk-Free Purchase Guarantee on Swanson Ultra Super-Strength Magnesium Citrate

If you are dissatisfied for any reason, we'll give you a full refund and pay return shipping.

Swanson's Standards

We are dedicated to offering the highest quality products at the best price. Find out more about how we ensure such a high standard in everything we do.

Learn More
Customer Service
About Swanson
© 2017 Ratings based on results of the 2017 Survey of Supplement Users. More information at
© 2017 Swanson Health Products – Terms of Service