According to researchers 1 tblsp of lemon peel a week is enough to help prevent skin cancers.

The nutrients that keep our immune system working well include vitamins A, B6, B12, C, and D as well as copper, folate, iron, selenium, and zinc. Focus on getting these nutrients from a healthy, varied diet, including fruits and vegetables, nuts and seeds, and whole grains.

Just one cup of kiwi provides almost 275 percent of the daily recommended allowance of vitamin C. Kiwis are low in calories but high in energy, making them a great option for people trying to lose weight.

Wheatgrass is especially high in vitamins A, C, and E, as well as iron, magnesium, calcium, and amino acids.

Almond milk is naturally high in vitamin E, a disease-fighting antioxidant.

Peanuts contain biotin, a B vitamin necessary for healthy hair and overall scalp health. It also offers vitamin E, which nourishes the skin and protects it from the damaging UV rays.