Final answer:
Fat is vital for energy storage, building cell membranes, insulation, and vitamin absorption. It must be balanced, as both deficiency and excess pose health risks. Adequate fat intake is essential for general health, athletic performance, and disease prevention.
Step-by-step explanation:
A certain percent of fat is vital to health and survival because it plays several critical roles in the body. Fat is a primary energy store and is more calorically dense than carbohydrates and proteins, offering about 9 calories per gram. It serves as insulation to maintain body temperature in cold environments, which is essential for animals like polar bears and seals. Additionally, fats are necessary for the construction of cell membranes, especially in the brain and nerve cells, and support the absorption of fat-soluble vitamins such as vitamins A, D, E, and K. Athletes require fat to sustain energy levels and support metabolic functions during intensive training.
However, it is crucial to balance fat intake, as excess storage can lead to conditions such as overweight and obesity, contributing to increased health risks like diabetes, heart disease, and stroke. Excessive fat, particularly visceral fat, is a significant predictor of disease risk. Conversely, not having enough fat in the diet can lead to deficiencies in fat-soluble vitamins and essential fatty acids.
Fats also contribute to the flavor of food and promote a sense of satiety or fullness, which can aid in regulating food intake and maintaining a healthy weight. Thus, incorporating the right amount of fat into one's diet is crucial for both maintaining health and preventing disease.