10 Years of Studies Link Acne Breakouts to Diet

A review of 10 years of studies and clinical trials shows that what you eat might play a role in whether or not you develop acne. The review, which was published in the International Journal of Dermatology in February 2021, aims to put an end to the question of whether acne and diet are related.

“Data like this certainly helps further support the evidence that diet somehow plays a role in treatment of acne patients,” Claire O’Bryan, APRN, a nurse practitioner and co-founder of The Skin Clique, tells Verywell.

Since acne can be a source of stress and anxiety for people who have it, O’Bryan, who was not involved with the study, says that being able to combine evidence-based dietary advice with traditional topical treatments will help clinicians treat acne patients holistically. 

A Decade Worth of Studies

The researchers performed a systematic review of 11 interventional clinical trials and 42 observational studies that were published over 10 years.

The results showed that there were several dietary factors associated with acne:

• High glycemic index diet
• High glycemic load diet
• Certain dairy foods
• Fast food
• Chocolate 
• Low intake of raw vegetables

However, there were also several dietary patterns that appeared to have a more protective role against acne, including:

• Frequent consumption of fruits and vegetables (more than 3 days per week)
• Fish included in the diet

Although the data was not as strong, the researchers did find evidence suggesting that eating eggs more than three days per week, drinking large amounts of soft drinks, and eating salty food could also be acne-promoting dietary factors. 

Can Diet Help Manage Acne?

The role of diet in acne development and presentation is still not completely clear. While many studies suggest that dairy foods are linked to increased acne prevalence, a 2019 study published in the journal Clinical Nutrition found that consumption of certain dairy foods—specifically yogurts and cheeses—had no effect on acne occurrence.

Among the recommendations in the medical literature regarding diet and acne, the strongest evidence supports limiting refined sugars and high glycemic foods as much as possible.

Refined carbohydrates, sodas, and ultra-processed foods such as cookies and cake can increase blood sugar levels quickly and trigger a hormonal response—both of which might be related to getting acne.

In fact, data published in 2012 suggested that when people with acne ate a low-glycemic load diet for 10 weeks, they had significantly less acne when compared to people who ate their normal diet.

What Else Causes Acne?

Acne is the eighth most common skin disease in the world. Acne often has a negative effect on the social lives, self-esteem, and body images of people who have it.

“The thing that makes acne so hard to tackle is that our skin is one of the only organs that reacts both to external and internal stimuli,” Meg Hagar, MS, RD, CDN, CLT, CHHP, Licensed Aesthetician and Acne Nutritionist, tells Verywell. “As far as why acne happens, we have to look both at the potential external stimuli and internal stimuli.” 

While dietary factors appear to play a role in acne appearance, they are not the only factors. Family history, age, skin type, hormones, and cannabis smoking habits may also play a role, according to a systematic review published in Scientific Reports in 2020.

A few studies in the review found that lack of sleep or insomnia, sun exposure, high mental stress, and using cosmetics might also be associated with increased acne.

No Silver Bullet Acne Treatment

There is no single treatment to target acne that works for everyone. While your diet might be one factor, there are still grey areas in dietary recommendations for people who experience acne.

Research published in 2014 suggests that probiotics could be promising for combatting acne. More specifically, consuming fermented foods (a natural source of probiotics) may offer some benefit.

If changing your diet does not help, there are still other ways to treat acne. A doctor-recommended topical treatment may also be beneficial.