Buy Iron (ferritin-gated)

Products that match the form and dose used in the studies. Umbral earns a commission on qualifying purchases; the ranking never changes with the commission.

Strong

60–100 mg elemental every other day + vitamin C (trial: 80 mg/day × 12 wk; alternate-day per absorption studies)

Ratings, prices and photos were read from Amazon on Sep 18, 2026. Amazon prices change; the current one is on the product page.

Thorne Iron Bisglycinate 25 mg, 60 capsules

4.7(8,933)

$16.00

Chelated iron with fewer GI side effects.

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Amazon price on Sep 18, 2026.

Lab ferritin + CBC panel (not sold here)

Umbral does not pin a product here on purpose. The instant ferritin strips sold on Amazon rate between 1.9 and 3.4 stars and are not accurate enough to decide whether to take iron — and taking iron you do not need causes real harm. Ask your doctor for a ferritin plus CBC panel drawn at a lab.

Ask your doctor: not sold here

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What to look for

✓Ferrous bisglycinate (gentle) 25–30 mg elemental, or ferrous sulfate 65 mg
✓Take every OTHER day with vitamin C

What to avoid

✕Any iron before a ferritin + CBC test
✕Taking with coffee, tea, calcium or dairy

Safety flags

⚑ Ferritin + CBC
· NEVER without ferritin + CBC — hemochromatosis affects ~1/250; excess iron is pro-oxidant.

See the evidence Record what I'm taking

As an Amazon Associate, Umbral earns from qualifying purchases. Product data is provided by Amazon and may change; ratings and prices shown are Amazon's, not Umbral's. Recommendations are based on the evidence grade and the form used in trials, never on commission.

Umbral is a wellness product, not a medical device. It does not diagnose, treat, cure or prevent any disease. Supplement information is educational; talk to a clinician before starting anything, especially if you are pregnant, under 18, managing a condition or taking medication.