French rider Remy di Gregorio has been banned for four years for using a form of banned blood-boosting hormone EPO.
His ban starts from the date of the test so he will be suspended until 7 March 2022.
Di Gregorio was suspended by his team, now known as Nippo-Delko-One Provence, at the time of his positive test.
Erythropoietin, or EPO, is a hormone which can increase endurance. It is injected under the skin and stimulates red blood cell production, which speeds up the delivery of oxygen to muscles.
This article was originally published by Bbc.co.uk. Read the original article here.