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

MSRP $10.99
Save 27%
Yes! I want 10% off and free shipping over $50 on my next automatic shipment of this item.  days. Learn more
In Stock

Supplement Facts

Serving Size 1 Tablet

  Amount Per Serving % Daily Value
Magnesium(from magnesium citrate) 225 mg 54%

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*

Are you getting enough magnesium in your diet? If not, don’t worry, because we’ve got Swanson Ultra Super-Strength Magnesium Citrate. What is magnesium? Magnesium is an essential mineral and can be found in abundance in seeds, whole grains, dark green leafy vegetables and some types of fish. Magnesium is important because it plays a key role in the basic cellular function of the heart and nervous system. Magnesium is also the catalyst for enzyme reactions that create energy.* Our magnesium citrate supplement delivers half of the body’s RDA of magnesium in one, highly bioavailable tablet!

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 112.
Rated 5 out of 5 by from Works great but... The only drawback is the size of the pill. It's pretty big. Other than that, it's great.
Date published: 2017-10-11
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 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 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 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 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 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
Rated 5 out of 5 by from highly ingestible magnesium this is the best form of magnesium you can take and at swanson prices it's wonderful. some have complained of pill size but they are very chewable just like my wonderful l-carnitine tablets. with a little water after chewing they go down very nicely.
Date published: 2014-05-26
Rated 4 out of 5 by from Good Product But Large Pills I take quite a bit of magnesium on a daily basis. This product is a good value for the price. However, even though I am a good pill swallower I find these to be too large and a bit hard for me to swallow. I would much rather they were in capsules.
Date published: 2014-05-08
Rated 5 out of 5 by from Rebalance your minerals Dietary supplement for dietary balance. If the water you drink is low in Magnesium and you can't get enough from your food, Magnesium Citrate can easily be absorbed and balance your minerals. Excess Magnesium is no problem, while excess Calcium without Magnesium could be.
Date published: 2014-04-09
Rated 5 out of 5 by from TAKING A GOOD LOOK AT MAGNESIUM CITRATE Okay, let's take a good look at Swanson's Ultra Super-Strength Magnesium Citrate 225 mg. tablets. . . . . . . As one can read in Swanson's product descriptions, this Citrate form of the mineral is generally considered to offer the advantage of 'optimum absorption and maximum utilization.' Check. I find that to be true. I get my desired results with no downside. This tablet, while large, is not a 'horse-pill,' and is swallowable without any objections from me or my family. Furthermore, I have found that this Citrate form of Magnesium does not have a laxative effect on me as do the Magnesium Oxide capsules I have used. This Magnesium Citrate is reasonably priced, as are the other mineral Citrates: Iron, Potassium, and Zinc, which I also take and buy from Swanson Health Products, of course. For me that all adds up to an effective and desirable product for all the purposes for which I take Magnesium. I want the finest in natural nutrients for my heart, brain, skeletal muscles, and all areas of my body. I like this versatile Magnesium Citrate product very much. I recommended it to one of my daughters recently. She replaced the 'drug store / big box store brand' of Magnesium she had been using with this high quality, all natural Magnesium Citrate, and she also likes this one very much for all the reasons mentioned above. Very nice product. Works for me.
Date published: 2014-03-11
Rated 5 out of 5 by from Excellent Its big but just bite it a few times and then swallow. The taste is powdery and unoffensive. Remember - Anything that can be swallowed can be chewed. That is true and a nurse friend told me that.
Date published: 2013-12-29
Rated 5 out of 5 by from Super-Strength Magnesium Citrate Good product and very affordable!!!!
Date published: 2013-12-12
Rated 1 out of 5 by from Only order 1 bottle I purchased 5 bottles prior to trying and that was a mistake. They gave me major diarrhea. Be close to rest room if you try them. They may be a superior product but they sure weren't good for me.
Date published: 2013-11-18
  • y_2018, m_1, d_11, h_10
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_22, tr_90
  • 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
Swanson Quality Assurance

Why Shop Swanson®?

We know how important your health is to you and your loved ones. That’s why we’re focused on delivering only high quality products you can trust at the best value.

Our lab evaluates every product to make sure it’s compliant with strict standards and government regulations, and we fully believe in and stand behind our products. If you’re 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

Easy Refill

  • Get your favorite products delivered automatically
  • 10% off future orders of Swanson brand products in your subscription
  • FREE standard shipping on all future orders over $50
  • Control the frequency, delivery date, item quantity... or cancel at any time
  • Email reminders before each delivery
See all FAQs here