In the Skeptics FAQ we say:
If your question is not about a particular claim, or if it is about research-level science, the following sites may be better suited for your needs:
- Physics - Physics - Stack Exchange
- Nutrition - Fitness and Nutrition - Stack Exchange
However, in the Fitness and Nutrition FAQ, they say that questions about "nutrition unrelated to exercise, such as food safety, nutritional needs for children, etc." is off-topic.
Should we change our example in the Skeptics FAQ?