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Slow Release Iron
21st Century
4.6
★ ★ ★ ★ ★
(16938 ratings)
Iron 45 mg
Score 65.0
A slow-release ferrous sulfate iron supplement (45mg) aiming for gentleness, but its efficacy is compromised by co-formulated calcium.
Quantity: 60 Tablet(s)Servings size: 1 Tablet(s) (60 servings)
Selected goals:
Other goals:
Energy
General Health
Immunity
Cognitive Support
Productivity Boost
leaderboard Score 65.0
A slow-release ferrous sulfate iron supplement (45mg) aiming for gentleness, but its efficacy is compromised by co-formulated calcium.
21st Century Slow Release Iron offers 45mg of iron as dried ferrous sulfate, formulated for slow release to potentially minimize common gastrointestinal side effects. This dosage is adequate for addressing iron deficiency. However, a notable drawback is the inclusion of calcium carbonate, an ingredient known to inhibit iron absorption. For optimal effectiveness, this supplement would need to be taken separately from meals or other supplements containing calcium, which adds a layer of inconvenience and potential for reduced efficacy if not managed properly.
- Slow-release formulation may reduce gastrointestinal side effects
- Provides a substantial 45mg dose of iron
- Affordable price per serving
- Contains calcium, which can inhibit iron absorption if taken concurrently
- Requires careful timing of intake to avoid reduced efficacy
- Ferrous sulfate can still cause side effects for some individuals
- Take this supplement at least 2 hours apart from calcium-rich foods or supplements to maximize iron absorption.
- Consult a healthcare professional before use, especially if you have existing health conditions.
$2.69($0.04 per serving)
 Amazon | $ 3.36 | |
 Walmart | $ 6.65 | |
 Pure Formulas | $ 2.69 | |
 iHerb | $ 4.99 |
| Ingredient | Amount per serving |
|---|---|
| Calcium (Calcium Carbonate) | 31 mg |
| Iron (dried Ferrous Sulfate) | 45 mg |
Categories
Iron 65.0
It's a reasonably dosed iron supplement, and the slow-release mechanism is a positive feature for stomach comfort. However, the presence of calcium is a significant formulation flaw that reduces its effectiveness as a sole iron source compared to products without absorption inhibitors.
Goals
Energy 68.0
The 45mg iron dose is effective for improving energy levels, and the slow-release may enhance tolerability. However, the presence of calcium could reduce the amount of absorbed iron, potentially slowing energy improvement.
Productivity Boost 68.0
While a good iron dose can enhance cognitive function, the co-presence of calcium may hinder optimal absorption, meaning the full productivity boosting potential might not be realized without careful dosing practices.
Hair Health 68.0
Iron is important for hair health. The iron content is beneficial, but the calcium could interfere with consistent iron delivery to the body, potentially limiting its full impact on hair.
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