Most western societies run on quite a high intake of alcohol.
"It's really only at high intakes of fat that we see problems."
Some studies show that people with high intake of iron, especially from food sources such as red meat, are more likely to have heart disease.
High intakes of fish oil can cause excessive bleeding in some people.
In both children and adults, there is concern that higher intake can increase the risk of side effects such as thyroid problems.
Lowering salt is definitely a good idea for all of us, but do it gradually, over weeks, if you are used to a high intake.
Those who had higher intake of just one group had more modest benefits.
It is not known how such a high intake of sE works to suppress tumor growth.
This does not mean that there is no potential for adverse effects resulting from high intakes.
There is some concern that high intake of iron might increase the chance of developing heart disease.