> but can go very wrong if not careful
This is vague and doesn't explain anything. Can you share any references that communicate what you're thinking about?
They're talking about vitamin D, which accumulates due to being fat soluble and is indeed toxic at a certain level[1]
It became something of a panacea nutrient, recently around COVID.
1. https://en.wikipedia.org/wiki/Vitamin_D_toxicity
They're talking about vitamin D, which accumulates due to being fat soluble and is indeed toxic at a certain level[1]
It became something of a panacea nutrient, recently around COVID.
1. https://en.wikipedia.org/wiki/Vitamin_D_toxicity