For example, blueberries are high in antioxidants which neutralize free radicals that can damage skin from sun exposure. They also contain Vitamin C which helps prevent wrinkles.
Watermelon, another summer favourite, is high in lycopene (more so than tomatoes!), which absorbs UVA and UVB radiation. If you're consistently including watermelon in your diet, it has also been shown to provide natural sun-blocking properties.
The quote 'Let Food be thy medicine, and let medicine be thy food' has never rang more true!