Quick summary: Common foods including white bread, sugary cereals, white rice, whey protein, coffee, and processed meats can trigger inflammation, excess sebum production, and acne breakouts by causing blood sugar and insulin spikes. Beauty expert Annabelle Taurua from Fresha warns that diet is one of the most overlooked factors in skin health, with one study linking frequent high-sugar food consumption to a 54% higher chance of developing acne. Swapping these items for omega-3-rich foods, green tea, and hydrating fruits and vegetables, while making gradual rather than drastic dietary changes, can support healthier-looking skin without overhauling an entire routine.
Beauty experts are highlighting how common cupboard staples could be undermining even the most diligent skincare routines. Annabelle Taurua from Fresha warns that while some foods boost and protect the skin, others may unknowingly hinder progress.
High glycaemic index items and sugary products top the list of concerns because they trigger blood sugar spikes and insulin surges, which can promote inflammation, excess sebum production, and acne breakouts.
Foods to watch
Several common foods have been identified as potential triggers:
- White bread has a high glycaemic index that causes sharp blood sugar spikes, prompting the body to produce a burst of insulin. This can trigger skin inflammation and worsen acne, increasing the frequency and duration of outbreaks in those already prone to breakouts.
- Sugary cereals, despite often appearing healthy, cause similar insulin spikes that lead to excess sebum production. Sebum is the natural oily substance produced by the sebaceous glands to protect the skin, but in excess it can cause oily skin, clogged pores, and breakouts. One study found that frequent consumption of high-sugar foods was linked to a 54% higher chance of developing acne.
- White rice, like white bread, is a refined carbohydrate with a high glycaemic index. Recent research suggests that people who consume more refined carbohydrates are often more prone to acne.
- Whey protein increases levels of a hormone called IGF1, which raises the skin’s oil production and can worsen acne symptoms. As a milk-derived product, it carries additional risk: recent studies show that young adults who regularly consume milk are four times more likely to have acne.
- Coffee can boost cortisol, the stress hormone, leading to excess oil production and breakouts. Over time, elevated stress hormones can disrupt the epidermal barrier, making the skin more vulnerable to conditions like eczema and psoriasis. Coffee’s diuretic properties also increase the risk of dehydration, which can make skin more prone to dryness, irritation, and the visible worsening of fine lines and wrinkles.
- Processed meats such as bacon, salami, pepperoni, chorizo, and hot dogs are high in sodium and fat. Excessive consumption can trigger inflammatory reactions including puffiness, dryness, and dark under-eye bags, and can exacerbate conditions like acne and rosacea.
Better alternatives
Experts recommend swapping these items for skin-friendly choices. Foods rich in omega-3 fatty acids, such as salmon and anchovies, can reduce inflammation and lower the risk of breakouts. Green tea is linked to lower sebum production, helping to regulate oily skin and reduce irritation.
5-ingredient smoothie for skin health
The beauty experts at Fresha also recommend a smoothie containing five simple ingredients to support healthier-looking skin:
- Oranges are rich in vitamin C, which protects against UV-related damage and boosts hydration.
- Pineapple provides an additional vitamin C boost, helping to hydrate and brighten the skin and reduce the appearance of dark circles and blemishes.
- Cucumber has antioxidant properties that soothe swelling and skin irritation, as well as boosting hydration.
- Avocado is high in vitamin B3, which boosts hydration, enhances moisture, and reduces the appearance of oily skin.
- Coconut water helps hydrate the skin and reduce inflammation.
Taurua said: “Often people end up spending hundreds on specific skincare serums and creams when it is actually their diet that is undoing all of the good work. People are often very quick to blame their moisturiser, cleanser, or makeup when their skin starts to flare up, but one of the most overlooked triggers is actually the food they are eating every day without thinking twice about it.
“Coffee is one of the most surprising triggers when it comes to your skin’s health, often because the drink has become part of many people’s daily routines. If you are dealing with persistent breakouts, dullness, or irritation, it can be worth switching up your daily diet. Choosing more skin-friendly alternatives such as whole grains, omega-3-rich foods, and hydrating fruits and vegetables can be an easy way to reduce visible signs of inflammation and promote healthier-looking skin.
“However, the good news is that improving your skin is not always about cutting everything out at once. It is about making more balanced choices consistently. For example, even just having one less cup of coffee per day will have a noticeable impact on your skin. Smoothies are another great way to enhance your skincare. They are an easy way to increase your intake of hydration, antioxidants, vitamins, and healthy fats, all of which play an important role in maintaining healthier-looking skin.”
Research supports associations between high glycaemic diets, refined carbs, dairy, and skin issues, though individual responses vary. Making gradual dietary changes alongside a consistent skincare routine may yield visible benefits for many.