Green MP Steffan Browning has been stripped of one of his portfolios after he suggested homeopathy could be trialled for curing Ebola.
Greens co-leader Metiria Turei said the party caucus had decided to remove Mr Browning's responsibility for the natural health portfolio.
The portfolio would be merged into the health portfolio, which is held by Kevin Hague.
Mrs Turei said the demotion sent a signal that the Green Party took an evidence-based approach to health issues, especially public health issues.
She said the move was about "rebuilding confidence" in the party.