One school in the South was part of a national survey over the use of supplements among top first XVs but says it has nothing to hide.
The use of supplements by school teams has come under the spotlight with Drug Free Sport New Zealand chief executive Graham Steel questioning their use by school teams.
Steel wondered if schools and their young players knew enough about the supplements and whether the emphasis on size at school rugby had led players and schools to take them without knowing the full risks involved.
Drug Free Sport New Zealand has done a survey of seven top first XVs and the results have led to the agency preparing to carry out a larger survey to see how widespread supplement use is.
New Zealand Rugby said it took the issue of drugs very seriously and the organisation had poured $100,000 into additional testing of players last year.
Players at first-class level and above are tested but no testing is done at the national under-19 tournament and players at schools.
Otago Boys' High School rugby administrator Brian Ashwin said he was aware of a survey done by the school's first XV players over supplement use but had limited knowledge of what information was asked for.
He said it had gone to other schools, most of which were in the North Island.
He said the school had nothing to hide.
''We have always done things right. We are in the spotlight all the time and we put too much work in to not do things right,'' he said.
He referred other inquiries about supplements to coach Ryan Martin.
Martin could not be contacted yesterday.
John McGlashan College First XV team director Mike Idour said the school first XV did not use supplements.
He said supplements could possibly be used by individuals and, from time to time, he heard rumours of use.
If a player or pupil did use them then he suggested they go to a specialist in supplements who could offer advice on what and when to use them.
''But at the end of the day it just does not feel right,'' Idour said.
Waitaki Boys' High School First XV coach Ryan Bambry said the team did not use any supplements and had no intention of doing so.
The pupils playing the games were too young to be taking supplements and they needed their bodies to develop more.
''Until they fully develop as an athlete then they should not be using supplements,'' Bambry said.
''But in this day and age the competition is so tough that any little advantage will be used by some teams.''
Dunstan High School First XV coach Tom Blaikie said looking at the size of his team no-one was using supplements.
If they were then they were not taking the right stuff, he joked.
But he said it was somewhat sad players were taking supplements in what was still a school competition.
''They are too young. This is what you hear about in American high school football. In the end it is just school rugby.''
