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Home » Diet » Does diet really matter when it comes to adult acne? – Harvard Health Blog – Harvard Health

When I was a teenager, the advice I got about acne was clear and consistent:

By the time I got to medical school, the message had changed. I learned that the diet-acne connection was considered a myth, and that what we eat has little to do with making acne better or worse.

But a new study has once again turned the tables. It suggests that diet might contribute to acne at least in adults.

For many including me thinking about teenage acne is a painful exercise. But its worth understanding why acne develops in the first place.

Acne is thought to develop because of a combination of factors: the production of too much oil in the skin, clogged skin pores, bacteria in the skin, and inflammation. Hormonal changes which occur during puberty, or with a condition called polycystic ovary syndrome and the menstrual cycle can have a big impact on acne, because they affect oil production in the skin. Some medications can cause acne (especially steroids and lithium), and hair products, makeup, and other products we put on our skin can contribute to clogged pores. Genetic factors, pollution, smoking, and stress have also been suggested as causes or contributors to acne.

And then there remains the possibility that diet matters. Certain foods can promote inflammation throughout the body, and its possible this triggers acne outbreaks. In addition, diet can affect hormones that, in turn, could make acne worse. For example, milk and foods with a high sugar content can cause a rise in insulin levels, altering other hormones that can affect the skin. Some research has linked milk and whey protein with acne.

Despite these possible connections between diet and acne, there is no consensus that changing your diet is an effective way to deal with acne.

A new study, published in the medical journal JAMA Dermatology, compared the results of 24-hour dietary surveys of more than 24,000 adults (average age 57) who reported having acne currently, having it in the past but not currently, or never having had it. The researchers found a correlation between the chances of having current acne and consumption of

Higher intake of high-fat, high-sugar foods was associated with a higher incidence of current acne. For example, compared with those with no history of acne, those with acne at the time of the survey were 76% more likely to report drinking at least five glasses of milk in the previous day, more than twice as likely to report consuming at least five servings of high-sugar drinks in the previous day, and eight times more likely to report consuming a complete meal of fatty and sugary products in the previous day.

Fast foods and snack foods were linked with past (rather than current) acne. And chocolate? Neither dark nor milk chocolate were associated with past or current acne.

There are reasons to interpret these results cautiously. Dietary records can be faulty. For example, a person with acne who strongly believes that diet affects their skin health may be more likely than others to recall and report certain elements of their diet (such as fatty or sugary foods) than those who are more skeptical about a connection. Such recall bias can affect the results of a study like this. And many of those who reported having adult acne were self-diagnosed; its possible that some of these diagnoses were not accurate. Other factors so-called confounders might be at play and lead to misleading conclusions. For example, maybe people who drink more milk also happen (just by chance) to live in more polluted areas, and its the pollution, not the milk, that explains the findings.

Finally, studies like this can only detect an association, not causation. That means that while those with adult acne tended to consume more fatty and sugary foods, the study cannot prove that their diet actually caused adult acne. It also could not determine whether a change in diet would reduce the incidence or severity of acne.

As our understanding of acne continues to evolve, we may eventually have clearer guidelines about the best diets to prevent or treat it. For now, whether youre a teenager or an adult, its likely that there is no single diet that will guarantee clear skin. So enjoy your favorite foods in moderation. And if you find that some of them make your skin worse, youll have to decide if theyre worth it.

Follow me on Twitter @RobShmerling

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Does diet really matter when it comes to adult acne? - Harvard Health Blog - Harvard Health

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Home » Diet » Does diet really matter when it comes to adult acne? – Harvard Health Blog – Harvard Health