Eat healthy foods which are freshly cooked. Do not keep stress on the mind,it is one of the reason for making look older.
A herb found in most kitchens called sage and it's antioxidant can used for the treatment of Alzheimer's.
Drink plenty of water everyday.
My face mask tip: Take rosewater, Add sandalwood powder to it, mix well, apply the mixture on your face, let it get dried on your face, now wash your face with the rose water, clean with cotton. your skin will glow after that!