Apple is an excellent source of vitamin C, calcium, phosphorus, potassium, and soluble fiber, which supports gastrointestinal function and helps reduce cholesterol and triglycerides. It is also rich in polyphenols, such as quercetin, which improves brain function. Lemon, in turn, has a high content of vitamin C, essential for strengthening the immune system. Raspberry is another nutritious fruit, rich in vitamin C and manganese, and provides B-complex vitamins, calcium, and phosphorus, as well as antioxidants that aid in cell renewal.