While Zahler's iron supplement is not third-party tested, its products are produced in a CGMP-certified facility. Please discuss all ingredients with your healthcare provider before beginning this supplement. While some groups benefit from B12 and folate supplementation, less is known about L-histidine supplementation. This supplement also contains 100% of your daily value of folate, 3,000 percent of your daily value of B12, and the amino acid L-histidine. Zahler's contains 25 milligrams of iron bisglycinate (that's the stomach-friendly form we've been talking about) and 60 milligrams f vitamin C to aid in absorption. We included Zahler's Iron Complex in our top picks because it contains vitamin C (which some studies show may help enhance absorption of nonheme iron) and vitamin B12 (which people with poor absorption or low intake of animal products need to supplement). This higher amount may be necessary if you have a deficiency but should be used under a healthcare provider's recommendation and supervision. This amount is equivalent to 361 percent of your daily value of iron. Nature Made provides a higher dose of iron at 65 milligrams, or 325 milligrams ferrous sulfate. For that reason, the instructions for use with this supplement recommend taking it with water and a meal, which will be gentle on your stomach. The ferrous sulfate form of iron is more affordable and well-absorbed but more likely to cause stomach discomfort. There are 180 tablets per bottle, making the cost just a few cents per pill. We like Nature Made's ferrous sulfate because it is a high-dose, well-absorbed supplement that has been verified by two reputable third-party organizations- and USP. If you have a diagnosed iron deficiency, especially one that is severe, your healthcare provider will likely recommend a higher dose supplement. Thorne's facilities also have an A rating from Australia’s Therapeutic Goods Administration (TGA), the country's administration for regulating dietary supplements. Its facilities are CGMP certified, which ensures they are compliant with the FDA's Current Good Manufacturing Practices that regulate the way in which products are produced and standardized. Often, this is not enough to correct a more severe deficiency, so check with your healthcare provider to see if this supplement might be a good fit for your needs.Īs an added benefit, Thorne's capsules are also free from gluten, dairy, and soy. The amount contained in these capsules provides 139 percent of the average person's daily value of iron. It is NSF Certified for Sport, which means it undergoes NSF certified testing (verifying contents and ensuring only safe levels of contaminants), as well as additional athlete-specific testing to ensure there are no prohibited substances or masking agents.Įach Thorne capsule contains 25 milligrams of iron bisglycinate, a form of iron that is readily absorbed and typically does not result in gastrointestinal side effects, such as nausea and constipation. We like that Thorne Iron Bisglycinate checks so many boxes in our methodology, making it a trusted option. Thorne’s supplement may be an especially great choice for athletes who have been diagnosed with a mild deficiency.
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