I think you either have to find scientists you can trust (which presents a chicken & egg process) or study the field yourself.

That said, there are some good heuristics. Good scientists are able to show their reasoning process and explain why X is bad/good science. Bad ones handwave everything and push credentialism or rely on fallacious reasoning.

For example, I remember long ago when Ars Technica posted a detailed explanation of both what homeopathy is and how we know that it's completely bogus, why "water memory" doesn't and cannot exist, etc.

Meanwhile, in another failure of peer review, Nature published nonsense on "water memory" back in 1988:

https://en.wikipedia.org/wiki/Water_memory