Allegations in a report by the Kenya Anti-Doing Taskforce in April 2014 claimed that there was "systematic" drug use by the country's players, prompting World Rugby to investigate.

The organisation commissioned an independent review and appears satisfied that there isn't a problem to deal with.

The Taskforce report alleged that "in rugby, at the national team level and at two of the clubs, there appears to be systematic doping of players through the use of food supplements laced with steroids."

Although World Rugby confirmed the use of the supplements, they said there was no evidence to suggest that they contained any banned substances. 

The governing body said no anti-doping rule violation had been committed by Kenya, or the national coaching staff.

In addition, it was found that Paul Treu, the former national team coach who the Taskforce had accused of providing the supplements, had not done so.

Treu had earlier described the allegations as "unfounded" with KRU chairman Mwangi Muthee calling them "absolute rubbish".

World Rugby, which carried out its investigation with the support of the World Anti-Doping Agency, also ruled that both Kenya's teams were routinely tested with no adverse findings discovered.

Kenya are set to compete in the men's and women's sevens competitions at the Olympic Games in Rio de Janeiro  in August, where the sport will make its debut.

"While the investigation did not identify evidence that an anti-doping rule violation may have been committed, World Rugby continues to work with the Kenya Rugby Football Union to implement robust supplement education to all players and coaching staff via its Keep Rugby Clean programme," a World Rugby statement said.

"Kenyan players will also be tested extensively as part of the World Rugby anti-doping programme and in particular its pre-Olympic testing programme for participating unions and players.

"World Rugby is also prioritising the training of more regional educators to deliver anti-doping information at regional level, with a new pilot programme to be rolled out in 2016."

The full World Rugby report can be read here.