The FDA issued a safety communication warning that biotin can significantly interfere with certain laboratory tests. At 5000mcg of biotin in our formula, this warning applies directly to Gelagen users.
Biotin interference can affect troponin tests (used to diagnose heart attacks), thyroid function panels (TSH, T3, T4), parathyroid hormone, vitamin D, prostate-specific antigen (PSA) and other tests that use streptavidin-biotin immunoassay technology.
Many lab tests use biotin-streptavidin binding as part of their detection mechanism. When excess biotin is present in your blood from supplementation, it competes with the test reagent and produces inaccurate results — either falsely high or falsely low depending on the assay design.
Inform every healthcare provider that you take a biotin supplement before any blood work. Some labs recommend discontinuing biotin 48–72 hours before testing. Do not stop supplementation without discussing timing with your doctor.
Many supplement brands bury this warning or omit it entirely. We print it on every page because your safety matters more than our marketing convenience. Competing products that do not disclose their biotin dose cannot even give you this warning accurately.