Product Description
Proferrin ES is the original heme iron formula that's been rebuilding ferritin levels for athletes since 1998. This tablet has quietly delivered results for over two decades—the same 10.5mg of highly absorbable heme iron that established the brand's reputation for actually working when standard iron supplements fail.
Proferrin ES delivers heme iron through your body's natural absorption pathway, the same system that processes iron from a steak. Clinical studies show heme iron absorption rates of 15-35%, compared to just 2-10% from standard iron supplements. This isn't incremental improvement—it's a completely different approach that sidesteps the gut issues forcing most athletes to quit their iron supplementation.
What Makes ES Different
Original Tablet Formula – The tablet format offers an alternative to capsules for athletes who prefer swallowing coated tablets over gelatin capsules. Same superior heme iron absorption, just a different delivery system. The easy-swallow coating makes it manageable even for those sensitive to larger pills.
10x Better Absorption Than Standard Iron – Proferrin ES uses your body's natural heme iron pathway—the same one that processes iron from red meat. One tablet provides as much absorbable iron as 172 eggs, 23 chicken breasts, or a 12-ounce steak. No planning meals around coffee, calcium, or acid blockers.
Zero Gut Drama – Traditional iron supplements cause nausea, constipation, and stomach pain. Proferrin's small dose (10.5mg per tablet) means your gut processes what it needs without the usual side effects. Customer reviews consistently report it works much better than standard iron supplements.
The science is straightforward: heme iron polypeptide is derived from bovine hemoglobin and absorbed through specialized receptors in your intestinal wall. Endurance athletes face increased iron loss through foot-strike hemolysis, bleeding, and sweat. Your body can't make iron, so when stores run low, performance tanks. Proferrin ES delivers iron your body can actually use.
How to Use Proferrin ES
Take 1-3 tablets daily with or without food. If you're deep in training or have confirmed low ferritin (below 30-50 μg/L for athletes), start with 2-3 tablets. Once levels normalize, 1 tablet maintains stores without overdoing it. Get your ferritin checked every 8-12 weeks to dial in your dose.
Athletes who've taken Proferrin ES for years report it works consistently well, even for those who struggled to absorb standard oral iron supplements. Distance runners, cyclists, and rowers use it to maintain iron levels during heavy training blocks without the nausea that sidelines traditional supplementation.
Supplement Facts
30 Servings
Serving Size: 1 Tablet
Serving Per Container: 30
| Amount Per Serving | ||
|---|---|---|
| % Daily Value* | ||
| Iron (as Proferrin® Heme Iron Polypeptide) 10.5mg | ** | |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Daily Value (DV) not established
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We do not accept returns on food items that have been opened, but we will issue a store credit if you are unsatisfied. In the event of a return, you must first contact us before sending back a return shipment.
Consumable products over $40 receive a 50% store credit. This includes specialty nutrition products such as ketones or supplements/vitamins.
Proferrin ES FAQ's
Everything you need to know before getting started.
Both contain 10.5mg of the same highly absorbable heme iron. Proferrin ES comes in easy-swallow tablets, while Proferrin Clear uses dye-free capsules and is NSF Certified for Sport. Choose ES if you prefer tablets over capsules. Choose Clear if you need NSF Certification for competitive sport testing.
Heme iron uses your body's natural absorption pathway—the same one that processes iron from meat. It bypasses the pathway that causes nausea and constipation with standard iron pills, delivering 10-23x better absorption with minimal side effects.
Most athletes notice energy improvements within 2-4 weeks. Ferritin levels typically increase after 8-12 weeks of consistent supplementation. Get bloodwork after 8-12 weeks to assess progress and adjust dosing.