How many vitamins are there, and what are the two main categories?

The correct answer is based on the fact that there are 13 recognized vitamins essential for human health, categorized into two main groups: water-soluble and fat-soluble vitamins.

Water-soluble vitamins, which include vitamin C and the B vitamins (such as B1, B2, B3, B5, B6, B7, B9, and B12), are not stored in the body and need to be consumed regularly. They play crucial roles in energy production, metabolism, and red blood cell formation.

On the other hand, fat-soluble vitamins (A, D, E, and K) are stored in the body’s fatty tissue and liver, allowing for more flexibility in their intake. These vitamins are vital for various bodily functions, including vision (vitamin A), bone health (vitamin D), antioxidant defense (vitamin E), and blood clotting (vitamin K).

The other choices reflect inaccuracies regarding the number of vitamins or their categories. There is not a total of 12, 10, or 9 vitamins, nor do the latter options classify the vitamins into appropriate functional categories relevant to nutrition. Understanding the classification and the total count of vitamins is essential for anyone studying weight loss and nutrition