According to WADA: "Colostrum is not specifically prohibited, however it contains certain quantities of IGF-1 and other growth factors which are prohibited and may influence the outcome of anti-doping tests. Therefore, WADA does not recommend the ingestion of this product."However according to a study published in the journal, Nutrition: "Daily supplementation with 60 grams of bovine colostrum for 4 wk does not change blood IGF-I or IGF binding protein-3 levels and does not elicit positive results on drug tests."Each REGAINS capsule has 100 mg of colostrum, and a 60 capsule bottle has 6 grams. So each bottle has 10 times less colostrum than was given to the study participants PER DAY.Because of this we believe the possibility of the colostrum in REGAINS affecting a WADA test is almost zero.