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21st Century

21st Century Slow Release Iron Tablets

  • Supplement Type: Magnesium
  • Form: Tablet
  • Diet: Gluten Free
  • Allergens: Gluten Free

Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A gluten free, slow release iron tablet in a 60-count bottle, best suited to buyers who already know they want gradual release over a fast-acting dose.

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ASIN: B00582WT6ICategory: Iron Supplements

Overview

21st Century's slow release iron tablet comes in a 60-count bottle, formulated gluten free for buyers tracking iron intake without a fast-release spike.

Slow release tablets are built to release their dose gradually rather than all at once, the main functional difference from a standard iron tablet. The data doesn't list a milligram strength, so buyers who need a specific iron dose should confirm the label before ordering. No vitamin C pairing, often used to aid iron absorption, is indicated here.

  • Slow release delivery
  • 60 tablets per bottle
  • Gluten free formulation
  • Tablet form

Who it's for

Fits buyers who specifically want a slow release iron tablet rather than a standard fast-release version. Not the right pick if you need a documented milligram strength before purchase, since that isn't listed here.

Pros and cons

Pros
  • Slow release format
  • Gluten free formulation
Cons
  • No milligram strength listed
  • No vitamin C pairing indicated for absorption

Performance notes

Slow release tablets are designed to break down over a longer window than standard tablets, which can reduce the single-dose spike some people experience with fast-release iron. Gluten free is the only dietary claim listed. No iron strength in milligrams or vitamin C pairing is specified in this data.

Specifications

Brand21st Century
Supplement TypeMagnesium
FormTablet
DietGluten Free
AllergensGluten Free
Count60
FlavorUnflavored
BenefitsIron Support

Frequently asked questions

How many tablets are in this iron supplement?

60 tablets.

Is it gluten free?

Yes, per the allergens and diet claims listed.

Is this a fast or slow release iron tablet?

It's formulated as a slow release tablet.