Tennis chiefs are to introduce new supplements designed to avoid a repeat of the Greg Rusedski nandrolone case.
The Association of Tennis Professionals has told BBC Sport that the supplements will be introduced in 2005 and are guaranteed to be clean.
Most players stopped using supplements after they were blamed for a nandrolone scandal that rocked the sport.
But the ATP insists it has come up with a solution to the problem after talks with two pharmaceutical companies.
The BBC Sport website learned of the ATP's proposals just 24 hours after Rusedski warned that players were becoming ill and tired because they were afraid to take supplements.
Rusedski argued problems like magnesium deficiency, which has plagued the likes of Tim Henman, were widespread and could have serious consequences.
"I'm sure you could probably take the top 100 guys and they would have deficiencies because of the lack of vitamins and nutrition," said the British number two.
Rusedski was one of eight players to test positive for nandrolone while 55 other tests showed elevated levels of the drug.
But he escaped punishment by successfully arguing that contaminated supplements supplied by the ATP were responsible for his failed test.
The ATP agreed that the contaminated supplements were to blame for the positive tests and launched a major investigation into the problem.
But after spending more than £137,000 and testing more than 100 different substances for nearly a year, it has yet to find any contamination.
Nevertheless, a task force was set up by the ATP to look into the problem of supplements.
And it eventually came up with the idea of supplying the players with a limited number of supplements produced in a highly-controlled environment.
"The ATP agrees with what Greg Rusedski is saying and the task force was the ATP's response to the problem," an ATP spokesman told the BBC Sport website.
"The task force has now come up with this solution."
According to the ATP, there will be a three-step testing method to ensure the supplements are not contaminated.
The supplements will be produced under United States Food and Drug Administration regulations.
Each batch will be tested by the manufacturing companies before they are distributed.
Each batch will also be tested by the reputed World Anti-Doping Agency.
The supplements will then be made available to the players early next year through secure websites.