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Women do everything they can to make themselves look younger - from injecting toxins into their skin to undergoing harsh and invasive laser therapies, they'll try anything to get smoother skin. But it's what goes into your body that's most important.

The anti-aging market is probably one of the biggest beauty markets in the world. Expected to tip the $115 billion mark by 2015 in the United States alone, women across the world regularly invest in lotions, potions, scrubs, rubs, plastic surgeries and cosmetic procedures in the hope of making themselves look younger.

As we age, skin loses collagen. Collagen is what keeps skin elastic, enabling it to "ping" back into place, keeping it looking smooth and line-free.

As collagen production slows, skin becomes less elastic and wrinkles start to appear. For many women, the quest for eternal youth starts as soon as those first fine lines and wrinkles start to appear around the eyes or on the forehead - but luckily, there is one thing you can do to improve the appearance of skin. 

Eat! Choosing the right anti-aging foods could drastically improve the health of your skin - and all it takes is a trip to the supermarket.

Snack on Sweet Potatoes

We love sweet potatoes - roasted with a little olive oil and paprika as a savory snack, or with a pinch of cinnamon and a drizzle of honey as a sweet snack, they're one of the most versatile members of the potato family.

But sweet potatoes are not only the perfect accompaniment to any Thanksgiving spread, they're a weapon against aging! Sweet potatoes are bright orange in color and this comes from beta-carotene, an antioxidant that protects against potentially damaging free radicals.

When you eat foods containing beta-carotene, such as sweet potatoes or carrots, the body converts the beta-carotene into vitamin A.

Vitamin A is responsible for effectively "switching on" the signals within the body responsible for getting rid of old skin cells and for producing new skin cells. Regular turnover of new skin cells is what keeps skin smooth and wrinkle-free - and this is why many common skincare ingredients, such as retinoids, are derivatives of vitamin A.

Eat More Oily Fish

We've known for a long, long time that oily fish is incredibly beneficial for health, but a recent study by the University of California suggests that oily fish can make you look younger, too - and that's down to the omega-3 content.

Omega-3s cannot be produced by the body and so we have to get them from our diet - and oily fish is by far one of the best sources of omega-3s.

When we consume them, they actually boost cell turnover, increasing the production of new cells. They also help to prevent DNA damage and mutation, slowing down damage and in some cases, reversing it. As for skincare, oily fish can repair and prevent damage to skin cells - and wild salmon in particular contains another antioxidant, astaxanthin, which fights against free radicals and can help to prevent actinic keratoses, a skin complaint that causes rough patches of skin which are precancerous.

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