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Other studies show that tea decreased iron absorption from wheat bread fortified with ferrous sulfate or ferrous fumarate by 56 to 72%.1
Individual variation: Still, additional research is necessary to establish the best time to drink tea without affecting iron absorption.—Melissa Nieves, Verywell Health, 21 May 2025 Types of iron supplements for anemia include: Ferrous sulfate
Ferrous gluconate
Ferrous fumarate
Ferrous bisglycinate
Ferric citrate
Ferric sulfate
Aside from their varying physical forms, their chemical composition also differs.—Amy Brownstein, Ms, Rdn, Verywell Health, 25 Feb. 2025 For example, ferrous sulfate contains roughly 20% elemental iron compared to ferrous fumarate, which is 33% elemental iron.—Amy Brownstein, Ms, Rdn, Verywell Health, 25 Feb. 2025 In addition to ferrous sulfate and ferrous gluconate, other ferrous iron forms in a supplement include ferrous fumarate and ferrous bisglycinate.6
2.—Melissa Nieves, Verywell Health, 9 Jan. 2025 Fusion Lifestyle Iron Soft Chews provide you with 45 milligrams (250% Daily Value) of iron in the ferrous fumarate form, plus vitamin C to enhance absorption.—Tamar Kane, Ms, Rd, Verywell Health, 16 July 2024 People in these high-risk groups can prevent HIV infection with Truvada (emtricitabine and tenofovir disoproxil fumarate), a PrEP medication approved by the FDA in 2012 as a daily pill.—Don Rauf, EverydayHealth.com, 29 July 2024 Other forms of iron, like ferrous sulfate and ferrous fumarate, are not as gentle and may cause stomach issues for some.—Tamar Kane, Ms, Rd, Verywell Health, 16 July 2024 Truvada contains tenofovir disoproxil fumarate (TDF), whereas the newer Descovy contains tenofovir alafenamide (TAF).—New Atlas, 15 July 2024
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