The conversation was about magnesium supplements, not food.
It’s well-known that overdose from magnesium supplements is possible. The condition is called “Hypermagnesemia” and one of the primary causes is magnesium supplements.
> You have not supported this with links to credible sources.
As for supplement overdose: You should always assume that overdose is possible when taking concentrated supplements. Don't assume that you can apply the same logic to food (as in the link you provided) and isolated supplements consumed in bulk (as with the high magnesium doses discussed in this thread).
It is safe to take magnesium supplements unless you have kidney disease. If you consume excess magnesium it is simply not absorbed by the body.
Here are some excerpts from the article you linked:
"It is noteworthy that intestinal absorption is not directly proportional to magnesium intake but is dependent mainly on magnesium status. The lower the magnesium level, the more of this element is absorbed in the gut, thus relative magnesium absorption is high when intake is low and vice versa."
"As the kidneys play a crucial role in magnesium homeostasis, in advanced chronic kidney disease, the compensatory mechanisms start to become inadequate and hypermagnesaemia may develop."
"Acute and chronic oral magnesium supplementation has been described as well tolerated with a good safety profile."
The conversation was about magnesium supplements, not food.
It’s well-known that overdose from magnesium supplements is possible. The condition is called “Hypermagnesemia” and one of the primary causes is magnesium supplements.
> You have not supported this with links to credible sources.
If you'd like to know more about the dynamics of magnesium, scientific articles are easy to find: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4455825/
As for supplement overdose: You should always assume that overdose is possible when taking concentrated supplements. Don't assume that you can apply the same logic to food (as in the link you provided) and isolated supplements consumed in bulk (as with the high magnesium doses discussed in this thread).