https://ggenereux.blog/2024/05/13/niacin-is-it-another-bogus-vitamin/
What's next? Thiamine, riboflavin, vitamin C?
Btw he comes to this conclusion from eating bread all the time and noticed it was fortified and getting dandruff. Can't possibly be anything else can it? no it must be niacin.
If we define something as bad for us due to the fact it has a known toxicity level then where do we draw the line? As far as I'm aware zinc and iron can be dangerous in high amounts, does this mean Grant Should give up all that red meat he is eating? Let's see where his logic leads us.
Symptoms of iron toxicity : Iron toxicity can be classified as corrosive or cellular. Ingested iron can have an extremely corrosive effect on the gastrointestinal (GI) mucosa, which can manifest as nausea, vomiting, abdominal pain, hematemesis, and diarrhea; patients may become hypovolemic because of significant fluid and blood loss.20 Jul 2023 SOURCE
Grant - "Yes, I’ve heard the lame excuse of: “It’s the dose that makes the poison.” Obviously, that’s not true. It’s just more pharma propaganda. No, a poison is always a poison, and regardless of the dose. That’s why it’s called a poison! Taking any amount of a poison will damage, or kill, at least some of your cells. So, the dose only dictates the scope and severity of the damage caused by the poison."
There you go Grant, you can stop eating all that red meat now as we now know Iron is poisonous and therefore has no role in human physiology. Case closed.
And yes there is argument to actually be made for iron accumulation but the point still stands. We don't define something as a nutrient or a poison just based off whether it can have toxic effects in high enough quantities as there are a variety of factors at play and these molecules often play a crucial role in the human body.
Even Peat people understand Irons role in health despite its toxicity which is why it is a good example. The dose truly does make the poison.