You can have the most advanced skincare routine in the bathroom cabinet.
But if the skin still feels tired, dry, or lacks glow, the answer is often somewhere else entirely.
What you eat every day affects how the skin is built, how it retains moisture, and how it ages.
It’s nice to have a skincare routine that feels right. Cleanser, serum, day cream. Maybe an oil or an acid once a week.
And sure, it can make a difference. The skin can feel more hydrated and a bit more even.
But sometimes that’s not enough.
The skin still feels a bit tired. Maybe drier, or more sensitive than usual. The glow isn’t quite there.
Your first thought might be that you need to replace something or add a product.
But the skin isn’t built in the bathroom cabinet.
If you want the skin to be elastic, retain moisture better, and feel more alive, the body needs the right conditions.
And that’s where food comes in.
What you eat affects how the body produces collagen, how the skin functions as a barrier, and how it handles stress like oxidative stress.
It’s not something you can compensate for with skincare on the outside.
Why the skin can feel tired despite good skincare
Many see the skin as something to treat. But it’s an organ that works all the time. It protects, regulates, and repairs.
To do that, it needs nutrition.
If you sleep poorly, eat irregularly, or get too little protein over a longer period, it usually shows. The skin can become drier, a bit duller, or more sensitive.
It’s often connected to the rest of the body.
If the body doesn’t get what it needs, other things are prioritized first, and then it shows in the skin quite quickly. But on the other hand, you also notice a big difference when you make small, positive changes.
Nutrients the skin actually uses
There are often trends around specific foods said to be good for the skin. And they often are.
But it’s rarely individual foods that make the biggest difference. It’s more about which nutrients the body actually uses to build and maintain the skin.
Collagen is the protein that gives the skin structure and elasticity. To produce collagen, the body needs amino acids, especially glycine and lysine, which you get from protein-rich foods.
Eggs, fish, dairy products, legumes, and tofu contribute what the body uses in this process. If intake is too low, the body's ability to repair and maintain tissue, including the skin, is affected.
But the body needs more than just protein for it to work.
Vitamin C is needed in the enzymatic reactions that give collagen fibers the right structure and strength. Without enough vitamin C, collagen becomes weaker.
The outermost layer of the skin consists largely of fat, which affects how the skin retains moisture. Fats from, for example, olive oil, nuts, seeds, and fatty fish are part of what is used in these structures.
At the same time, the skin is constantly exposed to stress, such as UV radiation and the environment. Plant-based foods like berries, tomatoes, green leaves, beets, and herbs contain polyphenols and other substances that help the body handle this type of stress.
Collagen should not only be formed but also organized correctly and not broken down too quickly. Here, minerals like zinc and copper play a role, as they are involved in how collagen is built and maintained.
And part of the whole also involves the stomach. Fibers from, for example, legumes, vegetables, and berries serve as nourishment for the bacteria in the gut. Fermented foods like yogurt, kefir, or sauerkraut add lactic acid bacteria, which affects the environment in the gut and ultimately also the skin.
Do you really need collagen supplements?
Collagen has become something of a standard solution in all its forms. Powder, capsules, gummies.
And there are studies where hydrolyzed collagen is linked to improved skin elasticity and moisture after a period of use. But the marketing often simplifies it a bit too much.
The collagen you eat is broken down in the stomach into amino acids, just like other protein. This means the body does not send it directly to the skin but uses it where the need is, for example in cartilage, tendons, or other connective tissue.
That does not make collagen unnecessary.
On the contrary, the specific peptides from hydrolyzed collagen can influence the body’s own collagen production, which is one reason it is studied specifically in skin contexts.
At the same time, collagen is important far beyond the skin, for example for bones, joints, and other connective tissue, which practically affects how the body ages and how strong it feels over the years.
But how well it works depends on the whole picture.
For the body to build and maintain collagen, it also needs access to enough protein, vitamin C, and minerals like zinc and copper.
Collagen supplements can be a good complement.
But they work best when the foundation is already there.
When are supplements relevant?
Ideally, we want to get nutrients through food.
Raw materials that are actually food, not something with a long ingredient list.
But reality doesn’t always look like that. Many get less of certain nutrients than they think, and supplements can then be an easy way to top up and balance the intake.
This applies, for example, to vitamin C, but also to other parts involved in the same process, like minerals. If the body doesn’t get enough, it becomes harder to build and maintain collagen. This also includes amino acids like glycine, which the body uses in many contexts, not least in connective tissue.
Since vitamin C is water-soluble and not stored in large amounts, a steady intake is more important than occasional high doses.
You don’t have to choose between skincare and food.
One does not exclude the other.
Most of us enjoy starting the day with a lovely skincare routine or treating ourselves once a week with a moisturizing face mask.
Skincare can help the skin from the outside, and what you eat affects what happens underneath.
So of course you don’t need to throw away your beloved products. But it might be worth thinking a bit more broadly than that.
Give the body what it needs first, so there is something to build on.
