What are organic substances essential for growth and health, found in plant and animal tissues?

Vitamins are organic compounds that are essential for various biochemical functions in the body, including growth, development, and maintenance of health. They play critical roles in processes such as metabolism, immune function, and cell repair. Unlike minerals, which are inorganic, vitamins must come from dietary sources as the human body cannot synthesize them in sufficient quantities. They are found in various foods, including fruits, vegetables, meats, and dairy products, and each vitamin has specific functions and benefits. For instance, vitamin C supports the immune system and aids in the absorption of iron, while the B vitamins are vital for energy production and red blood cell formation. Thus, vitamins are indeed crucial organic substances necessary for overall growth and health.