To avail maximum fruit nutrition benefits eat organic produce. Many "wild" varieties of berries and "tropical tree" fruits have still not treated with any kind of fertilizers or chemicals and can be readily purchased from local farm owners. Organic fruits tend to be smaller; however, they feature special flavor and richness in vitamins, minerals and stuffed with numerous anti-oxidants.
In the store, however, choose fruits that feature freshness, bright in color and flavor and feel heavy in your hands. Look carefully for blemishes, spots, molds, and signs of insecticide spray. Buy whole fruits instead of section of them (for example, buy a small size watermelon instead of a section of big size melon)