What are the two types of vitamins?

Vitamins are categorized into two main types: fat-soluble and water-soluble. Fat-soluble vitamins, such as A, D, E, and K, are stored in the body's fatty tissues and liver, meaning they can accumulate over time. These vitamins are typically absorbed along with dietary fat and are important for various bodily functions, including vision, immune function, and bone health.

On the other hand, water-soluble vitamins, which include the B-vitamins and vitamin C, dissolve in water and are not stored in the body. They need to be consumed more regularly since excess amounts are excreted through urine. Water-soluble vitamins play crucial roles in energy production, the synthesis of red blood cells, and the maintenance of the nervous system.

The other options do not accurately reflect the accepted nutritional classification of vitamins. Terms like "mineral-soluble" and "plant-soluble" do not correspond to any recognized categories of vitamins, while soluble and insoluble relate more to physical properties rather than vitamin classification. "Required and non-required" also does not capture the essential roles these vitamins play in the diet and body function, as both types of vitamins are required for health in differing ways.