Eating chocolate causes acne in teenagers

What the research found

Acne is mainly driven by puberty hormones, oily skin, blocked pores and genetics, according to Australian health guidance. The Royal Children's Hospital says diet does not usually cause acne. Another guidance page says research has not shown a strong link with chocolate or lollies.

Some studies point the other way. A 2016 trial of 25 acne-prone males found that 25 g of 99% dark chocolate a day for 4 weeks worsened acne scores and lesion counts. A 2018 survey of 10,521 young people aged 15 to 24 in Europe linked the highest chocolate intake with higher odds of acne.

The survey could not show cause and effect. A parent having acne was a much stronger link in that survey. A 2005 systematic review found surprisingly little evidence either way on diet and acne, and much of it had methodological limitations. A 2013 review noted that the 2005 review found no clear evidence of dietary components increasing acne risk.

What it doesn’t mean

• This does not mean chocolate is harmless for every teen. If your teen notices that certain foods trigger pimples, it is reasonable to try cutting them back.
• The small trial involved only males and was short. It cannot tell us what happens in girls or over the long term.
• Acne can be treated effectively. If it is severe, painful, scarring or affecting your teen's mood, see a GP or pharmacist rather than relying on diet changes.