For centuries every society has used olive oil (from the ancient Egyptians to the Greek). I believe it is still the most wildly used oil on the planet. Just 2 tbsp a day can reduce coronary heart disease; anti-thrombotic and anti-inflammatory diseases… just to name a few. As for hair and nails olive oil is a treat, it mends and repairs split end and keeps your hair in excellent condition. It’s always good to rub a bit in your hair at least once a week, especially if you have a relaxer… then… it’s a must have. As for nails it does the exact same thing. Olive oil is a magic oil that treats and conditions everything it touches.