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DOSERANKEVIDENCE-BASED SUPPLEMENTSFull analysis

The short answer · Iron status

Take ferrous bisglycinate & ascorbic acid for iron status. This is the one to buy.

NOW Foods, Iron Complex Caps, 100 Veg Capsules
1

NOW Foods, Iron Complex Caps, 100 Veg Capsules

4.8· 5,098 ratings· $0.09/serving

DoseRank score87

Ferrous Bisglycinate 27 mg — inside the studied 15-120 mg window

Of 4,948 products scored for Iron status, NOW Foods, Iron Complex Caps, 100 Veg Capsules ranks #1 with a DoseRank score of 87. Ferrous Bisglycinate and Ascorbic Acid are the strongest evidence signals for this outcome.

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The form“Why Ferrous Bisglycinate & Ascorbic Acid?”Evidence Strong evidence

Ferrous Bisglycinate and Ascorbic Acid are the strongest evidence signals for this outcome.

  • Ferrous BisglycinateThe pick

    Strong evidence · 27 mg

    Iron chelated to glycine; significantly better absorbed than sulfate with minimal constipation or nausea - the preferred form for sensitive individuals or maintenance dosing.

  • Ascorbic AcidThe pick

    Strong evidence · 70 mg

    Pure vitamin C in its simplest acid form; effective and inexpensive, but can irritate the stomach at higher doses - buffered forms suit sensitive users.

  • Ferrous Sulfate

    Strong evidence · 65 mg

    The standard reference form for iron supplementation; high elemental iron content and low cost, but frequent constipation, nausea, and dark stools limit tolerability.

Questions

Frequently asked

NOW Foods, Iron Complex Caps, 100 Veg Capsules ranks #1 for Iron status with a DoseRank score of 87. The score blends clinical strength, evidence, dose fit, trust signals and value across 4,948 products scored for this outcome.

Ferrous Bisglycinate and Ascorbic Acid are the strongest evidence signals for this outcome.

1 of 2 dosed ingredients land in the studied range. Ferrous Bisglycinate at 27 mg lands inside the studied 15-120 mg window. DoseRank scores this product's dose fit at 67 out of 100.

NOW Foods, Iron Complex Caps, 100 Veg Capsules works out at $0.09 per serving. $0.09 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.04 per serving.

No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.

Use rankings as research support

DoseRank rankings are informational and not medical advice. If you are pregnant, breastfeeding, using medications, or managing a health condition, ask a qualified clinician whether a supplement fits your situation. Stop use and report concerning adverse events to a clinician, the product maker, or the retailer.

Disclosure

Retailer links may be affiliate links. Rankings and placement are not paid placement.

NOW Foods, Iron Complex Caps, 100 Veg Capsules

$0.09/serving · ★ 4.8 · In stock

60-sec quizView on iHerb
— $0.09/sv
60-sec quiz instead
Cheaper alternative$0.04 per serving21st Century, Iron, 65 mg, 120 Tablets

Retailer links may be affiliate links. Rankings and placement are never paid.

Buy the #1 pick
The dose“Is the dose actually effective?”Dose fit 67

1 of 2 dosed ingredients land in the studied range. Ferrous Bisglycinate at 27 mg lands inside the studied 15-120 mg window.

Ferrous Bisglycinate

Studied window 15-120 mg · this pick 27 mg

Ascorbic Acid

Studied window 100-500 mg · this pick 70 mg

50 mg
50 mcg
The ranking“Why should I trust this pick?”Trust 95

Strong trust signals — consistently high marks from verified buyer ratings. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.

  • 4,948 products scored
  • Never paid placement
  • Evidence level: Strong · 92
  • 431 brands
  • 23 ingredients
See the full analysis — every score, every productHow the ranking works
The price“Can I do better than $0.09 a serving?”Value 84

$0.09 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.04 per serving.

  • 10
    21st Century, Iron, 65 mg, 120 TabletsScore 86 · $0.04/serving
    iHerb
  • 9
    Source Naturals, Advanced Ferrochel™, 180 TabletsScore 87 · $0.06/serving
    iHerb

Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.

Ready?

The #1 pick is $0.09 a serving.

NOW Foods, Iron Complex Caps, 100 Veg Capsules — in stock at a tracked retailer.

View on iHerb
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