▁that ▁he ▁had ▁been ▁taking ▁ 1 9 - nor andro sten ed ione , ▁a ▁met abol ic ▁prec ursor ▁to ▁N and rol one ▁sold ▁over - the - counter ▁in ▁the ▁United ▁States ▁until ▁ 2 0 0 4 . ▁At ▁the ▁time ▁Christ ie ▁had ▁been ▁training ▁in ▁Florida ▁in ▁the ▁winter ▁months , ▁and ▁may ▁have ▁been ▁using ▁the ▁pro h orm one ▁without ▁knowing ▁it ▁could ▁produce ▁a ▁positive ▁test . ▁Alternatively , ▁Christ ie ▁may ▁have ▁been ▁under ▁the ▁impression ▁he ▁was ▁admin ister ing ▁a ▁different ▁an abol ic ▁ster oid ▁with ▁a ▁nar ro wer ▁testing ▁window . ▁Sub st ances ▁like ▁Master on ▁and ▁Prim ob olan ▁are ▁est er ified ▁in ▁oil ▁similar ▁to ▁N and rol one , ▁and ▁would ▁be ▁ind ist ingu ish able ▁if ▁mis l abeled . ▁Gr anted , ▁there ▁is ▁no ▁evidence ▁to ▁support ▁this , ▁but ▁it ▁would ▁certainly ▁explain ▁why ▁an ▁ath lete ▁of ▁his ▁m atur ity ▁and ▁stat ure ▁was ▁found ▁positive ▁for ▁met abol ites ▁well - known ▁to ▁stay ▁in ▁ad ip ose ▁t issue ▁for ▁many ▁months . ▁▁▁▁▁▁▁▁▁ ▁Christ ie ▁has ▁always ▁denied ▁any ▁wrong do ing . ▁" If ▁I ▁took ▁dru gs ▁there ▁had ▁to ▁be ▁a ▁reason ▁to ▁take ▁dru gs . ▁I ▁had ▁pretty ▁much ▁retired ▁from ▁the ▁sport ." ▁Furthermore , ▁he ▁denied ▁that ▁his ▁phys ique ▁was ▁gained ▁through ▁drug ▁use ▁and ▁promoted ▁an ▁anti - st ero id ▁approach :