Athletes may obtain banned medicines from physicians, pharmacists, retail outlets, health and lifestyle magazines, gymnasiums, coaches, family members, fellow athletes, the internet and the black market. Many GPs may prescribe unwittingly for what they trust is a genuine , 14 & 16 With the banning of amphetamine, those prone to doping turned to over-the-counter (OTC) medicines containing ephedrine, pseudoephedrine, phenylephrine and phenylpropanolamine, available for purchase in community pharmacies. Banned drugs, including anabolic steroids, are widely advertised in lifestyle magazines and gymnasiums and there are no controls on mail order and internet sales.
According to Hunter's 2004 testimony before a federal grand jury, Jones's use of banned drugs began well before Sydney.  Hunter told the investigators that Jones first obtained EPO (Erythropoietin) from Graham, who Hunter said had a Mexican connection for the drug. Later, Hunter said, Graham met Conte, who began providing the coach with BALCO "nutritional supplements", which were actually an experimental class of "designer" steroids said to be undetectable by any drug screening procedures available at the time. Graham then distributed the performance enhancers to Jones and other Sprint Capitol athletes. Still later, Hunter told federal agents, Jones began receiving drugs directly from Conte.
Karras, Spyridon , Shah, Iltaf , Petroczi, Andrea , Goulis, Dimitrios , Bili, Helen , Papadopoulou, Fotini , Anagnostis, Panagiotis , Persinaki, Aggeliki , Tarlatzis, Basil and Naughton, Declan (2013) An observational study reveals that neonatal vitamin D is primarily determined by maternal contributions: implications of a new assay on vitamin D forms the roles of vitamin D forms. In: 15th European Congress of Endocrinology; 27 April – 1 May 2013, Copenhagen, Denmark. (Endocrine Abstracts, no. 32) ISSN (print) 1470-3947