Carlyle Slow Release Iron 45 mg
- Iron
- Tablet
- Iron
- 180
- Better rated than 56%
A vegetarian, slow release 45 mg iron tablet with a six month supply per bottle, aimed at people who want a gentler format than standard ferrous sulfate.
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How it ranks among the 59 iron we track
4.7★ across 819 Amazon ratings, Bayesian-smoothed toward the category average.
819 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
1,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 59 iron we track - how the scorecard works · full iron data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Carlyle's CL16384 packs 45 mg of slow release ferrous sulfate iron into 180 tablets, formulated as vegetarian, non-GMO and gluten free, and pitched as a men's and women's mineral supplement.
Slow release iron tablets are designed to release the mineral gradually rather than all at once, which is the usual reasoning behind that format for people who find regular iron supplements hard on the stomach. At 180 tablets, one a day covers roughly six months.
- 45 mg slow release ferrous sulfate
- 180 tablets per bottle
- Vegetarian, non-GMO, gluten free
- Carlyle model CL16384
Who it's for
Fits adults who need an iron supplement and have found standard immediate release iron tablets upsetting to their stomach. Not a substitute for medical treatment of diagnosed iron deficiency, where a doctor should set the dose.
Strengths and trade-offs
Drawn from this product's published specifications.
- 180 tablets is close to a six month supply at one a day
- Vegetarian and gluten free formula
- Slow release format aimed at easier tolerance
- Iron supplements can still cause stomach discomfort in some people regardless of release speed
- 45 mg is a specific dose that should match what's actually needed
- Tablet form, not a capsule or liquid
Performance notes
Ferrous sulfate is one of the more common iron forms in supplements, and the slow release coating is meant to spread absorption out over time instead of delivering it all at once. Individual tolerance for iron still varies.
Specifications
| Brand | Carlyle |
|---|---|
| Model | CL16384 |
| Form | Tablet |
| Supplement Type | Iron |
| Count | 180 |
| Benefits | Nutritional Support |
| Flavor | Unflavored |
| Diet | Gluten Free, Vegetarian |
Other Carlyle iron
How it compares
This product against the closest alternatives we track in iron.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Carlyle Slow Release Iron 45 mgThis product | 4.7 / 5 | 819 | 4.4 / 5 |
| Nature Made Iron 65 mgNATURE | 4.7 / 5 | 54,615 | 4.6 / 5 |
| Nature's Bounty Iron 65mgNature’s | 4.7 / 5 | 35,600 | 4.6 / 5 |
| Slow Fe 45mg Iron Supplement for Iron DeficiencySlow | 4.7 / 5 | 9,942 | 4.6 / 5 |
| Feosol Original Iron Supplement TabletsFeosol | 4.7 / 5 | 9,100 | 4.6 / 5 |
Similar iron from other brands
Questions about the Carlyle CL16384
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How much iron is in each Carlyle CL16384 tablet?
45 mg of ferrous sulfate per tablet.
Is it vegetarian?
Yes, the formula is listed as vegetarian, non-GMO and gluten free.
How long does one bottle last?
At 180 tablets and one a day, a bottle covers around six months.