A hat is an inexpensive and it will protect your hair the most if you are spending a long period of time outside in direct sunlight. And these days you can purchase a hat with UV/UVA protection.
Increase your vegetable and fruit intake. Try vegetables that are high in beta carotene, such as carrots, sweet bell peppers, and sweet potatoes. These foods can aid in sun protection because these antioxidants are more resistant to sun exposure.
Most hair gels have UV/UVA (Ultraviolet A) rays protection. The gel will create a protective barrier over your hair blocking the UV/UVA rays. If you are not a fan of gel, you can always use a mousse that has UV/UVA protection properties.
Jessica Lewis's tutorials have received more than 22 million views on the MahoganyCurls YouTube channel, and nearly 500K follow the Macon, GA native via social media.