This is a great article I’m reprinting in its entirety from the Smart Skin Care site, an independent research collective that does not sell or endorse any products.

An ideal clinical study is set up something like this. First, find a large uniform pool of candidates and randomly assign them to two groups. Second, change a single variable in a controlled way, e.g. administer a nutrient or a drug to the one group and give a placebo to the other group. Importantly, neither the administering doctors nor the subjects should know who is giving/getting what. After the treatment, analyze the results and make a conclusion whether the difference in the outcome between the groups is likely to be due to random statistical variations or the effect of the treatment. Such a study, especially if repeated by several independent groups of researchers unaffiliated with commercial interests, gives you a decent chance of arriving at the truth about the value of the treatment in question.

Well, I have to disappoint you but conducting such a study to find the best diet to prevent or reduce wrinkles is next to impossible in real life. First, a dietary intervention involves too many variables — it is not practicable to vary every single aspect of a diet separately while keeping everything else constant. Second, long-running, interventional studies are very expensive. It is next to impossible to patent a diet, so such a study would require extremely generous public funding, which is hard to obtain for only a “beauty-threatening” problem like wrinkles. And there are other obstacles too. In other words, don’t hold your breath for a definitive study showing what diet is the best ‘wrinkle cure’.

The most comprehensive such study to date was published by researchers from Monash University, Melbourne, Australia in 2001 in the Journal of the American College of Nutrition. The researchers analyzed the diets of 453 people (aged 70 years and over from Australia, Greece and Sweden) to determine the correlation, if any, between the consumption of certain types of foods and skin wrinkling.

The overall conclusion was that a low-glycemic diet high in varied fruits, vegetables, nuts, legumes and fish was associated with less skin wrinkling. Specifically, the following food were noted:

Foods associated with less wrinkling

In the Monash study, less skin wrinkling in the elderly was associated with higher intakes of:

Total fat
Mono-unsaturated fat
Olive oil and olives
Fish (especially fatty fish, such as sardines)
Reduced fat milk and milk products, such as yogurt
Eggs
Nuts and legumes (especially lima and broad beans)
Vegetables (especially leafy greens, spinach, eggplant, asparagus, celery, onions, leeks and garlic)
Wholegrain cereals
Fruit and fruit products (especially prunes, cherries, apples and jams)
Tea
Water
Zinc (foods which contain zinc include seafood, lean meat, milk and nuts).

Foods associated with more wrinkling

More skin wrinkling in the elderly was associated with higher intakes of:

Saturated fat
Meat (especially fatty processed meats)
Full fat dairy products (especially unfermented products and ice cream)
Soft drinks and cordials
Cakes, pastries and desserts
Potatoes
Butter
Margarine

This is an important list of chemicals you absolutely must avoid in any products that touch your skin or enter your body. Our skin can absorb an incredible 60% of what is rubbed onto it. Depending on the size of the chemicals, they may be able to enter your bloodstream in as quickly as 20 minutes. Here is a list of must avoids from the Dr. Mercola site:

Mineral Oil, Paraffin, and Petrolatum – Petroleum products that coat the skin like plastic, clogging pores and creating a build-up of toxins, which in turn accumulate and can lead to dermatologic issues. Slows cellular development, which can cause you to show earlier signs of aging. Suspected cause of cancer. Disruptive of hormonal activity. By the way, when there’s an oil spill in the ocean, don’t they rush to clean it up – fast? Why put that stuff on your skin?
Parabens – Widely used as preservatives in the cosmetic industry (including moisturizers). An estimated 13,200 cosmetic and skin care products contain parabens. Studies implicate their connection with cancer. They have hormone-disrupting qualities – mimicking estrogen – and interfere with the body’s endocrine system.

Phenol carbolic acid– Found in many lotions and skin creams. Can cause circulatory collapse, paralysis, convulsions, coma and even death from respiratory failure.
Propylene glycol – Used as a moisturizer in cosmetics and as a carrier in fragrance oils. Shown to cause dermatitis, kidney or liver abnormalities, and may inhibit skin cell growth or cause skin irritation.

Acrylamide– Found in many hand and face creams. Linked to mammary tumors in lab research.
Sodium laurel or lauryl sulfate (SLS), also known as sodium laureth sulfate (SLES)– Found in car washes, engine degreasers, garage floor cleaners… and in over 90% of personal care products! SLS breaks down the skin’s moisture barrier, easily penetrates the skin, and allows other chemicals to easily penetrate. Combined with other chemicals, SLS becomes a “nitrosamine”, a potent class of carcinogen. It can also cause hair loss. SLES is sometimes disguised with the labeling “comes from coconut” or “coconut-derived”.

Toluene – Poison! Danger! Harmful or fatal if swallowed! Harmful if inhaled or absorbed through the skin. Made from petroleum or coal tar, and found in most synthetic fragrances. Chronic exposure linked to anemia, lowered blood cell count, liver or kidney damage, and may affect a developing fetus. Butylated hydroxytoluene (BHT) contains toluene. Other names may include benzoic and benzyl.

Dioxane– Found in compounds known as PEG, Polysorbates, Laureth, ethoxylated alcohols. Common in a wide range of personal care products. The compounds are usually contaminated with high concentrations of highly volatile 1,4-dioxane, easily absorbed through the skin.
Dioxane’s carcinogenicity was first reported in 1965 and later confirmed in studies including one from the National Cancer Institute in 1978. Nasal passages and liver are the most vulnerable. Dioxane is easily removed during the manufacturing process by “vacuum stripping”. Warning: It is a synthetic derivative of coconut. Watch for hidden language on labels, such as “comes from coconut”.

Just for instance, the ingredients in Pfizers popular moisturizer, Lubriderm, are:
Water, mineral oil, petrolatum, sorbitol, lanolin, lanolin alcohol, stearic acid, triethanolamine, cetyl alcohol, fragrance, butylparaben, methylpapaben, propylparaben, sodium chloride.

So what are our options? I’ve been using the Natural Body Butter that Dr. Mercola has on his site. It’s practically edible and really does have a nice consistency and work well for delivering the moisture your skin needs.