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