While your dentist may have suggested that you wear a night guard to help prevent clenching and grinding which wears down the enamel on your teeth (and shorter teeth are a tell-tale sign of aging), a night guard also can also prevent jowls and sagging skin.
Dairy is one of the most triggering foods for those who are acne prone and I can usually tell by seeing a client's skin if they have been consuming dairy. The dead giveaway is tender, inflamed acne lesions (many times cystic) found mostly on the cheeks, but also the jawline and chin.