A 10-week study in Berlin found that people who consumed high doses of ecdysterone, a chemical found in spinach, performed better.
We take a look at the biggest stories from across Europe that you need to know about today.
The ban on Russia's anti-doping agency RUSADA was lifted by the World Anti-Doping Agency on Thursday, subject to various conditions, in a decision greeted with dismay by campaigners
Anti-doping agency set to decide on ending Russia ban.
Defending champion Chris Froome has been cleared of cleared of doping charges, days before the Tour de France begins
But the disgraced former champion will only pay a fraction of the amount sought in a lawsuit brought by fellow cyclist Floyd Landis and the US government
The International Cycling Union (UCI) will use X-ray equipped trucks on Grand Tour stages and leading classic races this season following an increase in concerns about riders using motors inside their bikes
The delegation said it could not explain how meldonium ended up in Alexander Krushelnitsky's body.
Ziga Jeglic has tested positive for fenoterol, an asthma drug which aids breathing.
Kei Saito failed an out-of-competition doping test the day he arrived in Pyeongchang.
The doping raids involved team Altopack Eppela and took place around Tuscany.
The IAAF is investigating allegations that the world champion's coach Dennis Mitchell and an agent offered to supply performance-enhancing drugs.
Russian Deputy Prime Minister Vitaly Mutko who was heavily implicated in the Sochi doping scandal said that being given a lifetime Olympic ban doesn't have any impact on his current work with FIFA