When it comes to skin, most people start on the outside.
Skincare, treatments, injectables. They all have their place. But what’s often overlooked is what’s happening underneath.
Because the condition of your skin is closely linked to how your body is functioning overall.
“The skin isn’t just something you treat topically,” says Madeline Calfas, nutritionist and registered nurse. “It reflects what’s going on internally. If the system is supported properly, the skin tends to follow.”
That’s why diet plays a bigger role than people expect.
Not in a restrictive way, but in how consistently you’re giving your body the nutrients it needs to maintain healthy skin over time.
Start with foods that support the basics
Rather than focusing on trends, it’s more useful to look at what actually supports skin function.
Dark leafy greens are a good place to start.
They contain compounds that help manage inflammation and oxidative stress, both of which can affect how the skin looks and behaves.
“Inflammation is one of the main things that can accelerate visible ageing in the skin,” Madeline explains. “So supporting that from within can make a noticeable difference.”
Greens also support liver function, which plays a role in how the body processes and clears what it doesn’t need. When that process is under strain, it can sometimes show up through the skin.
Antioxidants matter more than people realise
Environmental exposure, stress, and daily life all contribute to oxidative stress.
Over time, this can affect skin quality, texture, and overall appearance.
Foods rich in antioxidants help counter this.
Blueberries are one example. They’re high in vitamin C, which supports collagen production, as well as other compounds that help protect the skin from damage.
“It’s about supporting the skin’s ability to repair and maintain itself,” says Madeline. “That’s where these nutrients come in.”
Brazil nuts are another, particularly for their selenium content.
Selenium helps protect against long-term damage caused by environmental factors like pollution and sun exposure.
Even small amounts can be enough, which makes it an easy addition rather than something you need in large quantities.
Think about skin structure, not just surface
One of the biggest factors in how skin looks is its structure.
Collagen is a key part of that.
As production naturally slows over time, the skin can start to lose firmness and elasticity.
This is where protein becomes important.
“Protein provides the building blocks the skin needs to maintain its structure,” Madeline explains. “Without it, you’re not supporting that process properly.”
This doesn’t need to be complicated. A balanced intake of protein from sources like eggs, fish, or other whole foods is usually enough to support this.
Don’t underestimate simple foods
Some of the most effective foods for skin are also the simplest.
Tomatoes, for example, contain lycopene, an antioxidant linked to protecting the skin from sun-related damage.
“It’s not about relying on one ingredient,” says Madeline. “But these small additions, when consistent, can support how the skin responds over time.”
Lycopene is also found in other red fruits and vegetables, making it easy to include without changing your diet dramatically.
What tends to work against your skin
Just as some foods support the skin, others can work against it when consumed in excess.
High sugar intake is one of the main contributors.
It can drive inflammation, which affects not just overall health, but also how the skin looks and ages.
Fried foods can have a similar effect, particularly when cooked in lower-quality oils.
“Inflammation shows up in the skin,” Madeline says. “It’s one of the fastest ways to impact how it looks.”
Alcohol also plays a role, mainly through dehydration and its effect on how the body processes toxins.
Over time, this can make the skin appear more dull and less resilient.
What actually makes a difference
There’s no single food that will give you “glowing” skin overnight.
And focusing on one ingredient at a time usually misses the bigger picture.
“It comes back to consistency,” says Madeline. “What you’re doing regularly is what shapes how your skin looks.”
A balanced, nutrient-dense diet won’t replace skincare or treatments, but it will support them.
And in many cases, it’s the difference between short-term results and long-term skin quality.
