ABSTRACT
The human body needs nutrients, and malnutrition may result from an under- or over-consumption of energy and nutrients. The phytochemical substances are presented in nutrients and herbal medicines; both flavonoids and many other phenolic components have been reported on regarding their effective antioxidant, anticancer, cardioprotective agents, anti-inflammation, and immune system-promoting properties, for skin protection from UV radiation, and as interesting candidate for pharmaceutical and medical applications. For comparison purposes, the authors look at fresh foods first-fresh foods are generally consumed prior to postharvest nutrient degradation. Preservation of nutritional value in fresh, frozen, and canned products is reported by Barrett. Some highlights of preservation of nutritional value in fresh, frozen, and canned products are reported by D. M. Barrett. A more comprehensive discussion is based on a review of literature by J. C. Rickman et al., using the nutritional value of fresh, canned, and frozen fruits and vegetables.
