Fat-soluble vitamins are essential nutrients that dissolve in fats and oils, allowing them to be stored in the body's fatty tissues and liver. The primary fat-soluble vitamins include Vitamin A, Vitamin D, Vitamin E, and Vitamin K, each playing crucial roles in various bodily functions such as vision, bone health, and immune support. Unlike water-soluble vitamins, which need to be consumed regularly, fat-soluble vitamins can accumulate in the body, making it important to maintain a balanced intake. Overconsumption can lead to toxicity, so understanding the right amounts is vital for overall health.