Vitamins are just considered very much important with all other high caloric ingredients.
Since the advent of modern science, Vitamins were side tracked but later on it was discovered that most of the problem related to our body could easily solved by the use of vitamin ingredients.
Rarely it is found in any eatable as most are in citric fruits, most of the time you can get them in tablets or in syrups. In modern times, Vitamins are readily available with all other ingredients. In elder people Vitamin A and Vitamin B played a very important role in muscle strength. Many heart diseases are solved by using Vitamin K; if you want to make your bones strong then Vitamin D tablets are highly recommended. Vitamin C is specially used by females for making their skin to glow.
Green tea has vitamin K in it which is an important ingredient in weight loss. Last but not least, Vitamins are now part of our life, along with other stuff, we are in need of these components in our daily life