I would guess the researchers are interested in the multi-billion-dollar bodybuilding scam.
There are few snake oil industries larger than the bodybuilding supplement market. Also, weightlifting refers to the olympic sport, and what most people think of as weightlifting is more accurately called resistance training.
NZ Bill of Rights Act 1990:
"Freedom of expression---Everyone has the right to freedom of
expression, including the freedom to seek, receive, and impart
information and opinions of any kind in any form."
The BOR isn't anything like the US Constitution though, our courts cannot strike down laws as unconstitutional. The BOR is an interpretive guide for the courts, not an absolute rule.
-- A New Zealand law student.