Learn to think.

The details matter. Word definitions matter.

Here’s a post about vitamin toxicity, but he defines what it is and what it is not.

While a few nutrients can rapidly become toxic with minimally excessive intake (calcium, copper, and iron), many nutrients have little toxicity at almost any dose. In general, the doses of vitamins are difficult to push to the point of clinical toxicity. However, nearly all the nutrient minerals can readily be taken to excess and result in various presentations of toxicity. Toxicity in this context refers to definable physiological damage to the supplement taker, not occasional side effects such as nausea in a sensitive stomach (niacin) or osmotic diarrhea (vitamin C or magnesium) when too much is not efficiently absorbed but accumulates in the colon instead.

Let’s break this down. First he makes an assertion.

many nutrients have little toxicity at almost any dose

Then he defines what toxicity is:

Toxicity in this context refers to definable physiological damage to the supplement taker

Then he defines what it isn’t.

not occasional side effects such as nausea in a sensitive stomach (niacin) or osmotic diarrhea (vitamin C or magnesium) when too much is not efficiently absorbed but accumulates in the colon instead

This is called clear, quality writing.

Know what the definition of a term is. And what it is not.