I hear this kind of phrasing frequently in the discourse nowadays, but it doesn't seem like a useful framing to me. Is there a safe amount of chocolate? A safe amount of sex? Are we supposed to stop enjoying every pleasure of life as soon as someone does a large study with high enough statistical power to show some negative effect on health, no matter how small?

The question is whether the enjoyment we derive from these things is worth the risk, not whether there is a "safe level", whatever that means.