Can Sugar Cause Acne?

One of the most common questions people ask about acne is whether eating sugar causes breakouts. It's a topic that has received significant attention online, with many articles suggesting that eliminating sugar will automatically lead to clearer skin.

The truth is more nuanced.

Current evidence does not show that sugar directly causes acne. However, researchers have investigated whether diets with a high glycaemic load may influence acne severity in some individuals.

This distinction is important. Sugar itself is not considered the root cause of acne, but overall dietary patterns may play a role for certain people.

Understanding the evidence can help you make informed choices without feeling guilty every time you enjoy a sweet treat.

What is a high glycaemic diet?

The glycaemic index (GI) is a measure of how quickly carbohydrate-containing foods raise blood glucose levels after they are eaten.

Foods with a higher glycaemic index are generally digested more rapidly, leading to a quicker rise in blood glucose.

Examples may include:

• Sugary drinks.
• Confectionery.
• Cakes and pastries.
• White bread.
• Highly processed breakfast cereals.

It's important to remember that the overall pattern of your diet matters more than any single food.

Does sugar directly cause acne?

No.

Acne develops through several biological processes, including:

• Increased oil (sebum) production.
• Blocked hair follicles.
• Inflammation.
• Hormonal influences.
• Naturally occurring skin bacteria.

Sugar does not directly create these underlying causes.

However, researchers have explored whether diets high in rapidly absorbed carbohydrates could influence some of these biological pathways in people who are already prone to acne.

What does the research suggest?

Some studies suggest that people following lower glycaemic diets may experience improvements in acne symptoms.

However, research findings are not entirely consistent, and not everyone responds in the same way.

Current evidence suggests that:

• A lower glycaemic eating pattern may benefit some individuals.
• The effect appears to vary from person to person.
• More research is still needed to fully understand the relationship.

This means that reducing highly processed sugary foods may help some people, but it should not be viewed as a guaranteed acne treatment.

Should you stop eating sugar?

For most people, the answer is no.

Completely avoiding sugar is unlikely to be necessary and may make eating unnecessarily restrictive.

Instead, aim for a balanced diet that includes:

• Whole grains.
• Fruit and vegetables.
• Lean sources of protein.
• Healthy fats.
• Plenty of water.

Limiting highly processed foods as part of a generally healthy eating pattern is sensible for overall health, whether or not it affects your skin.

Focus on your overall diet

Rather than worrying about individual foods, it's often more helpful to look at your overall eating habits.

Ask yourself:

• Do you eat regular, balanced meals?
• Are highly processed foods making up a large proportion of your diet?
• Are you eating enough fibre, fruit and vegetables?
• Are you staying well hydrated?

Improving your overall diet is likely to have broader health benefits beyond your skin.

Avoid extreme advice

Social media often promotes extreme approaches, including:

• Completely eliminating sugar.
• Following detox programmes.
• Drinking special juices.
• Purchasing expensive supplements.

There is little evidence that these approaches reliably clear acne.

They may also create unnecessary stress around food, which can negatively affect your overall wellbeing.

Every person is different

Some people notice that their acne seems to worsen after periods of eating large amounts of sugary or highly processed foods.

Others notice no connection at all.

If you suspect certain foods affect your skin, look for consistent patterns over several weeks rather than blaming one meal or one dessert.

Keeping realistic expectations is important.

Acne management involves more than diet

Although diet may influence acne for some people, it is only one part of the picture.

Effective acne management often includes:

• Gentle skincare.
• Appropriate cleansing.
• Moisturising when required.
• Suitable acne treatments.
• Professional assessment if symptoms persist.

Looking after your skin consistently is generally more important than focusing on one particular food.

A balanced perspective

Current evidence suggests that diets high in rapidly absorbed carbohydrates may influence acne in some individuals, but sugar itself is not considered the direct cause of acne.

Rather than fearing individual foods, focus on maintaining a balanced diet, a healthy lifestyle and a consistent skincare routine.

Small, sustainable habits are far more valuable than restrictive diets that are difficult to maintain.

Frequently Asked Questions

Does sugar cause acne?

No. Sugar is not considered a direct cause of acne, although diets with a high glycaemic load may influence acne severity in some individuals.

Should I stop eating sugar completely?

No. Most people do not need to eliminate sugar entirely. A balanced diet is generally more beneficial than a highly restrictive one.

What is a low glycaemic diet?

A lower glycaemic diet focuses on carbohydrate foods that produce a slower rise in blood glucose levels and may be associated with improvements in acne for some people.

Will reducing sugar clear my acne?

It may help some individuals, but it is unlikely to clear acne on its own. Acne usually requires a broader approach that includes skincare and, where appropriate, medical treatment.

Is diet the main cause of acne?

No. Acne is primarily driven by biological factors such as hormones, excess oil production and inflammation. Diet is considered only one possible contributing factor.

Reviewed by Dr Tara Treacy, GP with a special interest in dermatology (IMC 411337).

Last reviewed: 16/07/2026.

General information only. It does not replace an individual medical assessment.