The Google-owned service says it will remove anything it deems "medically unsubstantiated".
Chief executive Susan Wojcicki said the media giant wanted to stamp out "misinformation on the platform".
The move follows YouTube banning conspiracy theories falsely linking Covid-19 to 5G networks.
Mrs Wojcicki made the remarks on Wednesday during her first interview since the global coronavirus lockdown began.
"So people saying, ‘Take vitamin C, take turmeric, we’ll cure you,’ those are the examples of things that would be a violation of our policy,” she told CNN.