The nutritional advice shared in this article is intended to support skin health for mild to moderate acne. It forms part of a holistic approach to wellbeing and is in no way a substitute for the advice of a dermatologist or conventional medical treatments.
You’ve probably been told a hundred times that sausage and chocolate are the sole culprits behind your blemishes. Let’s dispel this old myth straight away: eating a piece of cheese or a slice of pizza won’t cause a spot to appear within the hour. The scientific reality is far more fascinating and involves systemic inflammation and our gut. Yes, the health of our digestive system directly affects that of our skin. While some people have a porcelain complexion despite eating “junk food” every day, this is unfortunately not the norm. For most of us, adjusting our diet is the first step towards calming things down.
What is the real impact of our diet on acne?
To understand how what we eat turns into blemishes on our face, we need to keep an eye on a key indicator: the glycaemic index (GI). The GI, calculated based on the proportion of carbohydrates absorbed by the body, measures the speed at which a food releases sugar into the bloodstream.
When you eat a high-GI food, your blood sugar levels spike. To compensate, your body releases a large dose of insulin. This hormonal surge activates a molecule (IGF-1) that directly instructs the sebaceous glands to produce excess sebum. The sebum thickens, clogs the pores, and creates the perfect environment for inflammation and bacteria to thrive. In short: a diet too high in fast-acting sugars feeds acne from within.
What are the main foods to avoid if you have acne?
To help you see things clearly without putting you off your food, forget the endless lists. We’ve compiled here all the foods and habits that promote inflammation and excess sebum production.
| Category | Foods and products to be strictly limited | The mechanism involved |
| Refined sugars and grains | White sugar, bread (white or industrial wholemeal), white rice, polenta, cornflakes. | These foods have a very high glycaemic index (GI) which causes insulin levels to spike. |
| Junk food and processed foods | Anything processed: biscuits, pastries, crisps, savoury snacks, mayonnaise, Nutella. | They combine fast-acting sugars and unhealthy fats (trans fatty acids) that are highly inflammatory. |
| Cooked vegetables with a modified glycaemic index | Potatoes (steamed, chips, mashed), cooked carrots. | Cooking alters the structure of their starch, causing their glycaemic index to skyrocket. |
| Inflammatory proteins and drinks | Red meat and, in particular, processed meats, excessive chocolate (milk or white), alcohol. | They fuel tissue inflammation and overload the liver, the organ responsible for filtering toxins. |
| Associated environmental factors | Cigarettes. | Although not a food, tobacco constricts blood vessels, deprives the skin of oxygen and worsens acne. |
Which nutrients and foods should you prioritise in an anti-acne diet?
Don’t panic – eating an ‘anti-acne’ diet doesn’t mean going without. Nature is full of super-allies to regulate sebum production and soothe the skin.
Vitamin B6 (or pyridoxine) is your best weapon. It actively helps prevent and reduce skin problems by regulating hormonal fluctuations and sebum production. You can find it naturally in your daily meals thanks to these foods:
- Yeast
- Peas
- Spinach
- Broccoli
- Cabbage
- Mushrooms
To take your anti-acne diet a step further, combine these vegetables with sources of zinc and burdock (known for their skin-purifying and healing properties). Finally, the simplest step remains essential: it is advisable to drink plenty of water. Good hydration helps the kidneys and liver eliminate waste, thereby preventing the skin from having to expel it in the form of spots.
Changing your diet is a powerful strategy, but one that requires a key virtue: patience. Unlike a topical cream, a change in diet takes several weeks to show results on the skin. On average, it takes 28 days for the skin to complete its cell renewal cycle, and around 2 to 3 months for your metabolism to stabilise. Don’t give up too quickly; lasting results are just around the corner.
To complement your internal rebalancing, discover the benefits of a personalised approach with our Guide to Homeopathic Treatments for Acne.
Unsure about the cause of your blemishes? Go back to basics with our comprehensive guide: Causes of acne and natural solutions.
Scientific sources and medical references:
- Actas Dermo-Sifiliográficas – Diet and Acne: Update on the glycaemic index and dairy products connection.
- PuMed – The gut-skin axis relationship in chronic dermatosis.
- French Society of Dermatology (SFD) – Information sheets for the general public: Environmental and nutritional factors in acne.
FAQ – Your frequently asked questions about diet and acne
Is wholemeal bread better for the skin than white bread?
Contrary to popular belief, industrial wholemeal bread has a glycaemic index almost as high as white bread due to modern manufacturing processes. If you are prone to spots, opt for genuine naturally leavened bread or breads made from heritage flours (rye, spelt), which have a much lower GI.
Why are cooked carrots not recommended when raw carrots are good for you?
Cooking breaks down the fibres and converts the complex starch in carrots into simple sugars, which raises their glycaemic index. When raw, they retain a low GI and provide you with beta-carotene, an excellent antioxidant for the complexion.
Is plant-based milk a good alternative for preventing acne?
Yes, plant-based milks (almond, oat, hazelnut) are excellent alternatives to cow’s milk, which is often packed with natural growth hormones that stimulate sebum production. Be sure, however, to choose varieties labelled ‘no added sugar’ to avoid spiking your blood sugar levels.
