Bloodwork done while using 1ml 1x a week on monday blood was taken on a wednesday and serum level returned at 1302ng/dl with reference levels between 264-916. Free testosterone 33.0pg/ml with reference at 8.7-25.1pg/dl. Note that on this particular week testosterone injection was administered on tuesday morning and blood was taken less than 24 hours later and a previous injection had been 8 days prior