Eating a variety of fruit and vegetables provides us with plenty of vitamins and minerals, essential for a healthy life. Fruit and vegetable intake requirements depend on age, gender, health status, and health conditions.
Many people use fortified food and dietary supplements to fill nutritional "gaps": older individuals may struggle with eating enough or cooking to get required amounts of vitamins; for younger people today's fast paced culture is often characterized by diets poor in vegetables, fruits and whole grains. In addition, there are people with increased need for particular nutrients at certain times, such as pregnant and breastfeeding women, elderly people, sportspeople, dieters, heavy smokers and/or drinkers, people on long-term medication, and those with immune deficiency.
However, it should be kept in mind that dietary supplements are meant to “supplement”, but not “substitute” a healthy diet.