(HealthDay News) — Fish is a protein-rich food that may be very nutritious.

But it can also harbor dangerous levels of mercury that could add it to the “do not eat” list for some people, the U.S. Food and Drug Administration says.

The FDA offers these suggestions for kids and women of child-bearing age:

  • Don’t eat fish more than two or three times per week, especially if you’re pregnant or trying to become pregnant.
  • Eat a variety of fish.
  • Limit children to 1-2 servings of fish a week. Don’t feed fish to infants or toddlers younger than 2.
  • If you eat fish that is caught locally, check for advisories. If there are none, eat one serving and no more fish that week.