SuppHelper
search
Home›Supplements›Mineral›Iron›Iron 27 mg 21st Century
Product Image

Iron 27 mg

21st Century
4.7
★ ★ ★ ★ ★
(8439 ratings)
Iron 27 mg
Product Image
Score 68

An affordable tablet offering 27 mg of ferrous gluconate iron, but its accompanying calcium may reduce iron absorption.

How scoring works
scaleQuantity:110 Tablet(s) • (110 servings)
track_changesGoals:
flag Hair Health
flag Productivity Boost
flag Energy
flag Immunity
flag Nail Health
flag Mental Focus
flag Fitness

leaderboard Score 68

An affordable tablet offering 27 mg of ferrous gluconate iron, but its accompanying calcium may reduce iron absorption.

How scoring works
$4.99($0.04 per serving)
iHerb
$ 4.99
Pure Formulas
$ 5.37
Walmart
$ 5.74
Amazon
$ 9.99
flagReport prices
psychologyAnalysis

The 21st Century Iron supplement provides 27 mg of iron as ferrous gluconate, a form often considered to be somewhat gentler on the stomach than ferrous sulfate. It also includes 110 mg of calcium from calcium carbonate.

While the iron dose is appropriate for many individuals seeking daily support, the presence of calcium carbonate can interfere with iron absorption if taken together. This makes careful timing of intake important for maximizing the iron's effectiveness.

thumb_upPros
  • Provides a moderate 27 mg dose of iron.
  • Uses ferrous gluconate, which can be gentler than some other iron forms.
  • Extremely low price at $0.04 per serving.
  • Convenient tablet form.
thumb_downCons
  • Contains calcium carbonate, which can inhibit iron absorption.
  • May require careful timing of intake to maximize iron benefits.
  • Not a chelated iron form.
warningWarnings
  • To optimize iron absorption, consider taking this supplement at a different time than calcium-rich foods or supplements.
  • Iron supplements can cause digestive upset or constipation.
  • Keep out of reach of children due to risk of accidental iron overdose.
scienceNutrient quality
60 Moderate impact

Ferrous gluconate is a reasonable iron form, but the co-presence of calcium carbonate is a notable drawback as calcium can inhibit iron absorption. This reduces its overall nutrient quality score for iron.

visibilityIngredient transparency
85 Highest impact

The product clearly lists both the iron (ferrous gluconate) and calcium (calcium carbonate) with their respective quantities. This provides clear information on all active ingredients.

workspace_premiumValue for money
70 High impact

While extremely cheap, the potential for reduced iron absorption due to calcium slightly diminishes its value for money purely as an iron supplement. It still offers good affordability but with a caveat.

thumb_upCustomer satisfaction
85 Highest impact

With 8356 reviews, this product demonstrates very high customer satisfaction, likely due to its low price and effective iron dose, though the calcium interaction may not be widely known by consumers.

storefrontBrand
65 High impact

The brand offers a very affordable product with a decent iron dose. However, the combination with calcium suggests it's not optimized for peak iron absorption.

flagReport analysis
track_changesGoals
flagEnergy
Impact
High effect
Iron is crucial for energy, and 27 mg is a good dose. However, the calcium inclusion might slightly reduce the iron's overall contribution to energy levels if not timed correctly for absorption.
View goal →
flagFitness
Impact
High effect
For fitness, optimal oxygen transport is key, which iron supports. The potential for reduced absorption due to calcium could mean a slightly less effective contribution to fitness goals compared to a pure iron product.
View goal →
flagMental Focus
Impact
High effect
While iron supports cognitive function, the calcium's potential to interfere with iron uptake means that the benefits to mental focus might be somewhat diminished unless absorption is managed.
View goal →
flagProductivity Boost
Impact
High effect
Productivity relies on sustained energy and mental clarity, which iron supports. The inclusion of calcium may subtly hinder the full potential of the iron to provide these boosts.
View goal →
flagHair Health
Impact
High effect
While 27 mg of iron can support hair health, the co-ingestion of calcium may limit the optimal delivery of iron. This could reduce its potential impact on hair vitality.
View goal →
flagNail Health
Impact
High effect
The iron dosage is beneficial for nail strength, but the presence of calcium means the iron might not be absorbed as efficiently as it could be. This interaction needs to be considered for maximum benefit.
View goal →
flagImmunity
Impact
High effect
Iron supports various immune functions. The presence of calcium, which can interfere with iron absorption, might somewhat limit the full extent of this product's immune support from iron.
View goal →
scienceIngredients
IngredientAmount per serving
Calcium
110 mg
Iron
27 mg
grain_off Gluten Free person Adults 18–50
flagReport overview
Iron 68
This product provides a solid iron dose, but the concurrent inclusion of calcium means it's not an ideal standalone iron supplement for maximum absorption. Users need to be mindful of this interaction.
scienceView ingredientinventory_2View products
inventory_2Alternative products
90 Value

Iron 18 mg

NOW
4.7
★★★★★
(27793 ratings)
You get a significantly higher-scoring, gentle chelated iron for an even lower price per serving, offering excellent value for supporting energy and mental clarity.
Other sellers (5)
94 Value

High Absorption Iron with Ferrochel 27 mg

Doctor's Best
4.8
★★★★★
(13041 ratings)
This alternative combines a top-scoring, highly absorbable iron form with a still very budget-friendly price per serving, offering exceptional value for your wellness goals.
Other sellers (4)
95 Value

Iron Ferrochel Ferrous Bisglycinate Chelate 36 mg

California Gold Nutrition
4.7
★★★★★
(19060 ratings)
With a very high score for its premium chelated iron and a low cost per serving, this product offers superior quality and significant savings, making it a fantastic value.
Other sellers (0)
95 Performance

Iron Ferrochel Ferrous Bisglycinate Chelate 36 mg

California Gold Nutrition
4.7
★★★★★
(19060 ratings)
This alternative provides a highly bioavailable chelated iron, which is known for excellent absorption and gentleness, offering more effective support for energy and overall wellness.
Other sellers (0)
94 Performance

High Absorption Iron with Ferrochel 27 mg

Doctor's Best
4.8
★★★★★
(13041 ratings)
Featuring Ferrochel iron, this option is designed for superior absorption and is generally very gentle, making it a potent choice for supporting your energy, mental focus, and immunity.
Other sellers (4)
90 Performance

Iron 18 mg

NOW
4.7
★★★★★
(27793 ratings)
This product uses Ferrochel Iron Bisglycinate, a highly regarded chelated form that is gentle on the stomach and very effective at helping to maintain healthy iron levels for energy.
Other sellers (5)
90 Budget

Iron 18 mg

NOW
4.7
★★★★★
(27793 ratings)
This offers a superior, more absorbable chelated iron form at an even lower cost per serving, providing more effective support for your energy and mental focus.
Other sellers (5)
78 Budget

Iron 65 mg

Nature Made
4.7
★★★★★
(53917 ratings)
This provides a much higher dose of a standard iron form at a lower cost per serving, which can be an economical choice if you require more substantial iron support.
Other sellers (4)
85 Budget

Essential Iron 65 mg

Sundown
4.7
★★★★★
(3300 ratings)
Offering a higher dose of iron and a higher score at a comparable low price per serving, this is a very cost-effective way to boost your iron intake for energy.
Other sellers (0)
90 Value

Iron 18 mg

NOW
4.7
★★★★★
(27793 ratings)
You get a significantly higher-scoring, gentle chelated iron for an even lower price per serving, offering excellent value for supporting energy and mental clarity.
Other sellers (5)
94 Value

High Absorption Iron with Ferrochel 27 mg

Doctor's Best
4.8
★★★★★
(13041 ratings)
This alternative combines a top-scoring, highly absorbable iron form with a still very budget-friendly price per serving, offering exceptional value for your wellness goals.
Other sellers (4)
95 Value

Iron Ferrochel Ferrous Bisglycinate Chelate 36 mg

California Gold Nutrition
4.7
★★★★★
(19060 ratings)
With a very high score for its premium chelated iron and a low cost per serving, this product offers superior quality and significant savings, making it a fantastic value.
Other sellers (0)
95 Performance

Iron Ferrochel Ferrous Bisglycinate Chelate 36 mg

California Gold Nutrition
4.7
★★★★★
(19060 ratings)
This alternative provides a highly bioavailable chelated iron, which is known for excellent absorption and gentleness, offering more effective support for energy and overall wellness.
Other sellers (0)
94 Performance

High Absorption Iron with Ferrochel 27 mg

Doctor's Best
4.8
★★★★★
(13041 ratings)
Featuring Ferrochel iron, this option is designed for superior absorption and is generally very gentle, making it a potent choice for supporting your energy, mental focus, and immunity.
Other sellers (4)
90 Performance

Iron 18 mg

NOW
4.7
★★★★★
(27793 ratings)
This product uses Ferrochel Iron Bisglycinate, a highly regarded chelated form that is gentle on the stomach and very effective at helping to maintain healthy iron levels for energy.
Other sellers (5)
flagReport alternatives

SuppHelper

Compare supplements smarter. Science-backed, user-rated, updated daily.

Explore

  • Compare Supplements
  • Health Goals
  • Stacks

Legal

  • Privacy Policy
  • Terms of Use
  • Medical Disclaimer

Stay in the Loop

Medical disclaimer: Information on SuppHelper is for educational purposes only and is not medical advice. Statements on this site about dietary supplements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before using supplements. Read full disclaimer

© 2025 SuppHelper. All rights reserved.