4.8/5.0 147 Reviews

MAS Iron

MAS Iron was developed for a single purpose: to be the most well-absorbed, cutting-edge iron supplement for runners who want to ensure they have the iron they need to perform their best.



So Why Is MAS IRON Better?

MAS Iron combines the most efficiently absorbed form elemental iron with clinically proven ingredients to aid in absorption.

Each ingredient tested alone with iron demonstrated the ability to enhance absorption by 30% to 400%. This is why MAS Iron performs like no other iron product on the market.

4x Better Absorption

The addition of Alpha GPC when taking an iron supplement has been shown to increase absorption up to four times compared with taking iron alone. Alpha GPC has also been shown to increase the absorption of nonheme iron from food sources.

30% Increase in Bioavailability

Clinical research on BioPerine has made it clear that black pepper increases the uptake of iron supplements as much as 30%. Researchers believe this is because BioPerine enhances the bioavailability of iron supplements.

50% Fewer GI Side Effects

Not only is iron bisglycinate better absorbed than all other forms of iron, but research has shown using iron bisglycinate  resulted in 50-percent fewer GI side effects compared to the same dose of iron sulfate. 


Initial Labs
After 30 Days
I suffered from low iron for years because I just couldn't stay consistent with my iron supplement due to the frequent stomach issues. Mas Iron is the first iron supplement I've tried that causes no stomach issues, which has resulted in me finally staying consistent and seeing the needle move on my iron labs.
Isamar Riccitelli

Our "No Return Necessary"
Money-Back Guarantee

Try MAS Iron and if you don’t see your iron levels increase after 30 days or you’re unhappy for any reason, just let us know via email or phone and we’ll refund your money. No product return needed or complicated policies.


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Reviewed by 02 customer(s)

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  • Melissa

    Effective but wish it was a gummy

    I’ve been using a gummy iron for quite a while and I really prefer that than taking pills. The pills are small, but I still don’t like taking them. I may purchase the ferritin test to see how much different it is.

    March 4, 2024
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  • Linda

    Great customer service

    Liking the product so far and very happy with the customer service. I had a few questions about using iron given a few of my issues and their support team got back to me right away.

    February 26, 2024
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  • Tom


    I have tried other iron supplements in the past, but they always left me feeling bloated and uncomfortable. I didn’t experience any of those unpleasant side effects. Plus, knowing that it is well-absorbed means I can trust that my body is getting the iron it needs.

    February 21, 2024
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  • Carrie


    I bought this product as soon as it launched. Honestly, it almost seemed like they developed the product for my exact issues. I’ve had issues with low iron since I was in college and I tried everything to keep my levels consistently up, even cooking in cast iron pans. I wanted to try this product to see if it was really gentler on my stomach. So far no issues and after only a few weeks I already feel like I do when I know my iron levels are up. I’ll get some blood work soon, but really impressed with the product so far!

    February 19, 2024
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  • Martin

    Five stars

    It works as advertised and has supercharged my workout progress. Five stars from me.  

    February 14, 2024
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  • Dan

    Skeptical but glad I did

    I was skeptical at first since I may have been one of the first to purchase during their initial launch, but I am happy I did.Order arrived quick with solid packaging. Nice touch. I haven’t been able to test with any labs yet (still too soon) but I have noticed a lot less lethargy throughout the day and I’ve felt a lot better during my workouts the last few weeks.

    February 1, 2024
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E.g.: https://www.youtube.com/watch?v=HhBUmxEOfpc


Outside of training deficiencies, low iron is one of the most common reasons for poor results during workouts and races.

Recent research indicates that almost 56% of male runners and 86% of female runners suffer from an iron deficiency that severely hampers performance.

Thus, there is a very good chance you have low iron levels and could see improvement from supplementing from iron.

Mas Iron has been proven to be better than any current iron supplement on the market, so if you need to raise your iron levels it’s your best choice.

It’s best to take iron as soon as you wake up or before bed, once per day.

This is because iron is not easily absorbed by the body, especially when it’s taken with other nutrients, such as grains, proteins, calcium and caffeine.

While the product itself has many ingredients to aid in absorption, it’s still best to take it outside of meal times.

2 capsules, once per day.

If you have your bloodwork done and you’re in your “optimized zone” then you can pull back to one pill per day as maintenance.

Because it’s difficult to absorb iron from the foods we eat, light supplementation is still recommended when you’re at your optimized levels.

Yes, absolutely. While we do recommend getting your blood work done periodically (every 3-6 months) it’s perfectly fine to take iron without this.

We recommend blood work because with the technology available these days, it’s relatively cheap and easy to do at home and getting an accurate picture of your health is always a smart idea.


Please email us at support@masedge.com with the word “Cancel Order” in the subject line. Please note that we cannot guarantee order cancellation as we ship very quickly – but we’ll do our best.

At this time, we are unable to make any changes or edits to orders once they have been shipped – this includes the shipping address. Please review your information before completing your order.

Many companies offer a money-back guarantee because they know the majority of dissatisfied customers aren’t going to go through the hassle of actually returning the product to get their money back.

We don’t play these games because we don’t have to, the quality of our products makes it unnecessary.

If you order any of our supplements for the first time and don’t like it, you can keep it. Just notify us and we’ll give you a full refund. No complicated forms and no return necessary.

To protect ourselves from fraud, the It’s-On-Us guarantee is only valid for first-time purchases of a product, and redeemable up to 365 days after purchase. If you bought more than one supplement and weren’t happy with your purchase, in some instances, we may ask that you send the products back to us for a refund. Don’t worry though, you’ll never have to pay for return shipping.

Yes, just login to your account here and you’ll be taken to the subscriptions page where you can modify your preferences.

Shipping & Delivery

Most US orders arrive within 3 to 5 business days, but can take up to 7 business days.

Orders to Canada and the UK usually arrive in 10 to 14 days. Orders to other countries generally arrive within 14 to 21 days. Customs clearance may add a few extra days to this as well.

Yes, you will receive a tracking number via email.

Some orders get marked as delivered by our fulfillment house when they’re actually a day or two away.

If your order hasn’t arrived within two business days of being marked as delivered, contact us and we’ll help you out.

Unfortunately, we can’t ship to some countries because they’re very strict on what supplements they will and won’t allow to cross their borders, and too many customers were losing their orders.


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MAS Iron

#1 Iron Supplement for Runners

$34.95 or Original price was: $34.95.Current price is: $27.96. / month