I have a hair follicle test coming up in about 30 days. I do not do any drugs but take several vitamans such as B12, Biotin, Extra Strength Hair, Nails and skin supp, testosterone (im a male) and vitaman D and C.
I have read that the riboflavin in the B12, Biotin and extra strength supps could cause a false positive in a urine test so im wondering if its the same for a hair follicle test?
Does anyone know anything about this?
Thank you for any information