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⏳ Elevate your iron game—steady, gentle, and gluten-free for the modern achiever!
21st Century Slow Release Iron Tablets deliver a high potency, gluten-free iron supplement designed for adults seeking steady iron absorption without digestive discomfort. With 60 unflavored tablets per bottle, this slow release formula supports healthy iron levels all day long, backed by over 14,500 positive reviews and a trusted brand reputation.







| ASIN | B00582WT6I |
| ASIN | B00582WT6I |
| Age Range Description | Adult |
| Allergen Information | Gluten Free |
| Best Sellers Rank | #1,879 in Health & Household ( See Top 100 in Health & Household ) #10 in Iron Mineral Supplements #253 in Sales & Deals |
| Brand Name | 21st Century |
| Customer Reviews | 4.6 4.6 out of 5 stars (14,680) |
| Date First Available | May 28, 2012 |
| Diet Type | Gluten Free |
| Flavor | Unflavored |
| Global Trade Identification Number | 00740985273432 |
| Is Discontinued By Manufacturer | No |
| Item Form | Tablet |
| Item Weight | 0.11 Pounds |
| Item model number | 27343 |
| Manufacturer | 21st Century |
| Manufacturer | 21st Century |
| Manufacturer Part Number | B005LEMT1I |
| Material Type Free | preservatives free,yeast free |
| Model Number | 27343 |
| Number of Items | 1 |
| Primary Supplement Type | Magnesium |
| Product Benefits | Iron Support |
| Product Dimensions | 5 x 5 x 5 inches; 1.76 ounces |
| UPC | 740985273432 |
| Unit Count | 60 Count |
R**S
Comparable to Slow Fe — Much More Affordable and Works Just as Well
Comparable to Slow Fe — Much More Affordable & Just as Effective These have been a great alternative to Slow Fe. My hematologist originally recommended Slow Fe because regular iron tablets were not absorbing properly, and I was having to get iron infusions. After switching to slow-release iron, my iron levels improved. I decided to try 21st Century Slow Release Iron because it’s significantly more affordable, and I’m very happy I did. They work just as well for me and have helped maintain my iron levels without needing infusions. One of the biggest advantages is the packaging. Slow Fe comes in individual blister packs that can be hard to open. These come in a simple bottle, which is much more convenient — no struggling to open each pill. They are also gentle on my stomach, which is very important with iron supplements. If you’re looking for a budget-friendly alternative to Slow Fe that actually works, this is a great option. Highly recommend!
M**A
Great product and value!
Works as it should. No stomach upset!
M**4
Work perfectly
I must say these are the only iron pills that don’t cause constipation. I love them they really work. I hope they never stop making them. I have went to donate blood and my iron has been perfect and this is all I’ve been taking to keep my iron count good. They sell them at a perfect price point.
A**R
Great Product
I bought this as an alternative to what I normally purchase and it definitely provided the same results at a cheaper price. The pill was shaped differently but still easy to swallow. I would recommend.
S**L
Never feel sick!
This is a really good iron supplement! Most others make my stomach hurt, even the ones that say “gentle,” but this one is fantastic. I never feel sick. TMI: However, I do get pretty constipated 😞 so I have to start increasing my fiber intake or take a stool softener with it. I’ve been using it for a month now and I’ve seen and felt the benefits already. I no longer feel like I’m freezing all the time, my nails are actually getting stronger instead of breaking and being brittle, I’ve stopped getting dizzy spells when I stand up, and it has helped with my menstrual cycle issues. Highly recommend these! But if you’re prone to constipation when taking iron, you’ll need fiber or a stool softener for sure.
N**H
Good
Good supplements and did not upset my stomach
“**”
Works Well For Me! I like the price.
Works well for me. I use to take Slow-Fe.
M**D
Slow Fe
Slow Fe is a high quality iron supplement. It's reasonably priced. Easy absorption. And physician recommended
P**S
I love these pills. Gentle on the tummy and such great value for money. I get them for my parents as well. Used to get them on an Amazon subscription in the US. And was pretty miffed that I couldn't get them in Australia. But nowwww. I can. Yaaaaayyyy.
A**N
Great Price Month's in the Bottle
D**G
Works well
Trustpilot
1 month ago
2 months ago