Dietary supplements are vitamins, minerals, herbs or other ingestible health products. More than 50% of US population uses supplements regularly. Usage ranges from 40-60% in Asia to 30% in Europe and Latin America
Vitamins and minerals are essential micronutrients needed in small amounts. Most cannot be produced by body, except vitamin D from sunlight. Supplements should not replace healthy diet
Choline is essential for liver, muscle, brain function and fat metabolism. Body can make small amounts but needs rest from diet. Found in meat, eggs, whole grains, broccoli and supplements
L-carnitine is a naturally occurring amino acid found in body and supplements. Body needs 15mg daily from food or body's own production. FDA doesn't regulate supplements like prescription drugs