Microbial catabolism of phytosterol side chains yields C-19 steroids, C-22 steroids, and 17-ketosteroids (. precursors to adrenocortical hormones and contraceptives ).     The addition and modification of functional groups is key when producing the wide variety of medications available within this chemical classification. These modifications are performed using conventional organic synthesis and/or biotransformation techniques.  
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Ive also closely watched ‘non naturals’, some of whom I knew well, many of them over many years. 25 yrs experience tells me its insanity. If you think there’s no trade off you are very mistaken. It take its toll. Put someone on roids (and I do mean any) and watch them age very, very quickly. Perversely they believe they are getting younger somehow, ive heard all the lines ‘gh is the fountain of life’ , its an utterly bizarre statement. ( i studied medicine and also the endocrine system). A trainer at my local gym told me of a ‘new’ ‘medicine’ that made you grow very, very quickly with great strength gains, he had everyone on it. I read medical journals. Had the same effect on the kidneys as 3 courses of roids. Yeah….sounds great.