Nutritional supplements
Learning Center
Toddler speech development: What's typical for a 2-year-old?
A Mayo Clinic specialist describes typical speech development between the ages of 2 and 3.
Tonic-clonic (grand mal) seizure
Learn about this type of seizure that can cause convulsions. Also know how to help if you see someone having one.
Too much vitamin C: Is it harmful?
Vitamin C is an essential nutrient, but too much carries its own risks.
Vitamin C: An essential nutrient
Vitamin C is a water-soluble vitamin that supports normal growth and development and helps your body absorb iron. Because your body doesn't produce or store vitamin C, it's important to include vitamin C in your diet. For most people, an orange or a cup of strawberries, chopped red pepper, or broccoli provides enough vitamin C for the day.
Vitamin D deficiency
What are the risks of too little vitamin D?
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
What is thirdhand smoke, and why is it a concern?
Tobacco smoke creates toxic residue that clings to walls, carpets, clothes and other surfaces.
What is wheatgrass? Why is it in my drink?
Wheatgrass is a popular addition to smoothies and other drinks. While it's a rich source of nutrients, it's not a disease cure-all.
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