The 'Western diet' is linked to adult acne in a new study

The takeaway: limit sugar and dairy if you want better skin.

spoon holding sugar over bowl

This photo illustration taken on April 22, 2020 shows a teaspoon of sugar, an item that has been in short supply in Sri Lanka as a result of the COVID-19 novel coronavirus, in Colombo.

Photo by Lakruwan Wanniarachchi/AFP via Getty Images)
  • University of Paris researchers found that the consumption of fatty and sugary products, sugary beverages, and milk seems to increase adult acne.
  • The team used data from over 24,000 participants in a famous French study.
  • Roughly 50 percent of adults in Western countries over age 25 suffer from acne.

The bane of adolescence can be a lifetime recurrence with the wrong diet. According to a new study, published in JAMA Dermatology, the Western diet is associated with an increased likelihood of adult acne.

Acne is the result of dead skin cells and oil clogging hair follicles. This is the stuff of teenage nightmares: blackheads, oily skin, pimples, whiteheads, and even scarring. While the face is often the victim, acne affects other regions with a high number of oil glands, including the upper chest and back.

Acne is purportedly the most common chronic inflammatory skin disease in the world. While it mostly occurs between the ages of 15 and 17, studies show that roughly 50 percent of adults over age 25 continue to suffer from acne, whether intermittently or chronically. That group is predominantly female, and, more relevant to this study, they are from Western countries.

Acne psychologically stunts teenagers, resulting in low self-esteem, social isolation, and depression. These psychological conditions continue into adulthood. As the researchers of this study, led by a team from Institut National de la Santé et de la Recherche Médicale at the University of Paris write, acne "is reported to have the same emotional, social, and psychological consequences as chronic diseases, such as asthma, arthrosis, epilepsy, and diabetes."

Diet is not the only factor in chronic and persistent acne. Endocrine disorders and genetic predispositions play a role. Environmental and lifestyle factors, such as exposure to pollution, cosmetic products, and tobacco use also contribute. Dietary behavior is also a major factor—perhaps the major factor.

The treatments for acne range from azelaic and salicylic acid to antibiotics and retinoids. The team in Paris suggests a simpler method: eat less high-fat and high-sugar foods and beverages and consume less dairy.

Optimize Your Brain: The Science of Smarter Eating | Dr. Drew Ramsey | Big Think

Using data from over 24,000 participants from the French NutriNet-Santé study, the researchers assessed a dozen food groups, including milk and dark chocolate, refined cereals, vegetables, meat, and sugary beverages. They then classed participants by age, body mass index (BMI), educational status, smoking status, sex, medical history, and physical activity.

The results were clear: there appears to be a link between adult acne and the consumption of fatty and sugary products, sugary beverages, and milk, all major components of the "Western diet."

While proving causation will take time, the researchers offer a few hypotheses as to why these dietary groups could be behind adult acne.

  • High-glycemic diets elevate levels of Insulin-like growth factor-1 (IGF-1) and insulin, which ultimately increases levels of oxidative stress and inflammation.
  • Increased IGF-1 stimulates the production of androgens, producing higher levels of sebum, a yellowish, oily substance related to acne.
  • Milk consumption increases IGF-1 production by the liver; drinking milk has similar effects as eating a high-glycemic meal.

As with many post-study analyses, the team noted a number of limitations, including the fact that acne levels were self-reported in the initial study (therefore open to interpretation and personal biases), and the French population was skewed toward women, healthier dietary habits, and higher educational levels, which is not reflective of the entire planet.

Still, given the high prevalence of acne in the Western world and the well-known negative effects of the Western diet, their conclusion seems to stand on solid ground.

"The consumption of fatty and sugary products, sugary beverages, and milk appears to be associated with current acne. Our results may support the hypothesis that the Western diet (rich in animal products and fatty and sugary foods) is associated with the presence of acne in adulthood."


Stay in touch with Derek on Twitter, Facebook and Substack. His next book is "Hero's Dose: The Case For Psychedelics in Ritual and Therapy."

‘Designer baby’ book trilogy explores the moral dilemmas humans may soon create

How would the ability to genetically customize children change society? Sci-fi author Eugene Clark explores the future on our horizon in Volume I of the "Genetic Pressure" series.

Surprising Science
  • A new sci-fi book series called "Genetic Pressure" explores the scientific and moral implications of a world with a burgeoning designer baby industry.
  • It's currently illegal to implant genetically edited human embryos in most nations, but designer babies may someday become widespread.
  • While gene-editing technology could help humans eliminate genetic diseases, some in the scientific community fear it may also usher in a new era of eugenics.
Keep reading Show less

Octopus-like creatures inhabit Jupiter’s moon, claims space scientist

A leading British space scientist thinks there is life under the ice sheets of Europa.

Jupiter's moon Europa has a huge ocean beneath its sheets of ice.

Credit: NASA/JPL-Caltech/SETI Institute
Surprising Science
  • A British scientist named Professor Monica Grady recently came out in support of extraterrestrial life on Europa.
  • Europa, the sixth largest moon in the solar system, may have favorable conditions for life under its miles of ice.
  • The moon is one of Jupiter's 79.
Keep reading Show less

Astrophysicists find unique "hot Jupiter" planet without clouds

A unique exoplanet without clouds or haze was found by astrophysicists from Harvard and Smithsonian.

Illustration of WASP-62b, the Jupiter-like planet without clouds or haze in its atmosphere.

Credit: M. Weiss/Center for Astrophysics | Harvard & Smithsonian
Surprising Science
  • Astronomers from Harvard and Smithsonian find a very rare "hot Jupiter" exoplanet without clouds or haze.
  • Such planets were formed differently from others and offer unique research opportunities.
  • Only one other such exoplanet was found previously.
Keep reading Show less

Lair of giant predator worms from 20 million years ago found

Scientists discover burrows of giant predator worms that lived on the seafloor 20 million years ago.

Bobbit worm (Eunice aphroditois)

Credit: Rickard Zerpe / Flickr
Surprising Science
  • Scientists in Taiwan find the lair of giant predator worms that inhabited the seafloor 20 million years ago.
  • The worm is possibly related to the modern bobbit worm (Eunice aphroditois).
  • The creatures can reach several meters in length and famously ambush their pray.
Keep reading Show less
Politics & Current Affairs

FOSTA-SESTA: Have controversial sex trafficking acts done more harm than good?

The idea behind the law was simple: make it more difficult for online sex traffickers to find victims.

Scroll down to load more…