As Nanna will be the first to tell anyone, it all starts on the inside! –

1. Low fat anything.

I realize I’ve started broadly, but with a few upcoming books about the subject, I’m fully convinced 2016 will become the year dietary-fat-is-bad myths finally die. When manufacturers remove fat, they’ve got to “flavor up” those foods with something else, and that usually involves sugar. Put another way, “low fat” or “fat free” almost always translates into high-sugar impact. Studies show sugar’s damage includes impairing collagen fibers, rendering them incapable of repair and creating advanced glycation end products or “AGEs,” an appropriate acronym for what they do to your skin.

Easy swap: Skip these low-fat fake foods and go for skin-boosting healthy fat sources like avocado, slow-roasted or dehydrated nuts and seeds, and wild-caught fish.

2. Skim milk.

One of the largest and longest studies of women’s health, the Nurses’ Health Study, looked at some 77,761 nurses over 12 years. Those who drank more milk as teenagers had higher rates of severe teenage acne than those who drank less. Skim milk was worse than full-fat milk. Besides the lactose, researchers surmised the presence of hormones and bioactive molecules in the milk might have created adverse skin conditions.

Easy swap: Trade the cow’s milk for unsweetened coconut or almond milk.

Source: 5 ‘Healthy’ Foods That Wreak Havoc on Your Skin | Rodale Wellness