You can spend all you want on improving your skin from the outside, but to get the best results, you also need to focus on improving your skin health from the INSIDE.
If you want beautiful skin, you need to start ADDING BEAUTY-PROMOTING FOODS into your daily diet (as well as reduce the foods that lead to oxidative stress and contribute to aging and inflammation).
This also applies to SUN-CARE. You can literally use food as sunscreen (in combination with your physical/mineral sunscreen of course). Apart from applying a good nontoxic sunscreen daily, it helps to consume certain foods that can help to protect your skin from the damaging effects of the sun's UV rays.