Slow Release Iron

Name: Slow Release Iron
Brand: 21st Century
SKU: 1lAYANwk
Rating: 4.61 (17973 reviews)

21st Century

4.6

★ ★ ★ ★ ★

(17973 ratings)

Iron 45 mg

Score

A slow-release iron for better tolerance at a moderate-high dose.

How scoring works

Quantity:60 Tablet(s) • (60 servings)

Goals:

Energy

Productivity Boost

Hair Health

Score 94

A slow-release iron for better tolerance at a moderate-high dose.

How scoring works

$3.36($0.05 per serving)

iHerb	$ 4.99
Pure Formulas	$ 5.37
Walmart	$ 7.79
Amazon	$ 4.99

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Analysis

This tablet provides 45mg of iron as ferrous sulfate in a slow-release format. By releasing the iron gradually over time, it helps to reduce the sudden irritation that high-dose iron often causes in the stomach. It also includes a small amount of calcium.

This is a smart choice for those who need a moderate-to-high dose of iron but have had trouble with standard tablets in the past. It provides a good balance between potency and comfort for supporting daily energy and productivity.

Pros

Slow-release for better digestion
Good 45mg potency
Very affordable
Effective for raising levels

Cons

Uses basic sulfate form
Calcium may interfere slightly
Tablet is meant to be swallowed whole

Warnings

Do not crush or chew the tablet
Keep out of reach of children

Nutrient quality

Highest impact

A 45mg dose provides meaningful support for repletion using a specialized slow-release technology to mitigate side effects. The presence of Calcium Carbonate (31mg) is a minor drawback for optimal iron uptake.

Ingredient transparency

Highest impact

Labeling clearly identifies the elemental amounts of both iron and calcium utilized in the tablet. Directions for use and the slow-release claim are disclosed according to standard practices.

Customer satisfaction

Highest impact

Exceptional average ratings from a massive user base indicate that the slow-release format effectively reduces side effects for many. Feedback confirms significant improvements in iron levels and energy with good tolerability.

Value for money

100

Highest impact

The cost per serving is exceptionally low, especially for a specialized slow-release formulation. It offers outstanding value for users seeking an affordable yet more tolerable iron option.

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Goals

Selected only

Energy

Impact

Highest effect

A+

Goal Fit

Strength of Support

C-

Coverage

A+

Formula Quality

Dried ferrous sulfate in a slow-release format provides high-potency iron to support red blood cell function and oxygen delivery. The time-release delivery ensures a more gradual absorption, which may contribute to better digestive comfort compared to standard tablets.

A 45mg dose is meaningfully dosed for addressed deficiencies that may contribute to persistent fatigue. Maintaining healthy iron levels appears well aligned with the goal of improving physical stamina and cognitive energy.

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Productivity Boost

Impact

Highest effect

Goal Fit

A+

Strength of Support

Coverage

Formula Quality

Slow-release ferrous sulfate supports consistent oxygen transport and red blood cell health for sustained energy. This time-released iron form may contribute to a reduction in fatigue and improved concentration with fewer digestive side effects.

The inclusion of calcium appears well aligned with general mineral maintenance. Providing 45mg of iron offers focused support for maintaining the metabolic energy levels required for daily productivity.

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Hair Health

Impact

High effect

A+

Goal Fit

B+

Strength of Support

Coverage

B-

Formula Quality

Iron is essential for oxygenating the scalp and supporting the growth phase of the hair cycle. This slow-release format is designed to deliver a potent dose of iron while minimizing digestive irritation.

The choice of ferrous sulfate remains a less bioavailable option compared to chelated forms. It provides a focused mineral intervention without additional synergistic cofactors.

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Ingredients

Display goals

Ingredient	Amount per serving
Calcium (Calcium Carbonate)	31 mg
Iron (dried Ferrous Sulfate)	45 mg

Report overview

Iron (dried Ferrous Sulfate) · 45 mg OverallScore

D-

Active Ingredient Quality & Bioavailability

A+

Dose, Safety & Label Transparency

A+

Value

This slow-release supplement helps mitigate the digestive irritation common with iron sulfate. It provides a safe daily dose at an excellent price, although the iron form itself is less bioavailable.

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