Based on what, that's the question. It's the internet, you got scientists who spent years studying this issue, performed hundreds of studies to reach conclusion

Based on what, that's the question. It's the internet, you got scientists who spent years studying this issue, performed hundreds of studies to reach conclusions, published their conclusions in peer-reviewed journals. And then some guy from Twitter comes along and says "No it's not" and people run with it just because that's what they want to hear.