Can What You Eat Change Your Skin's Glow? The Science of Dietary Carotenoids

July 3, 2026

That warm, lit-from-within look people call a glow may owe something to your plate, not just your bathroom shelf. The pigments in colourful fruit and vegetables are turning up in skin, and the science is worth a closer look.

What are carotenoids?

Carotenoids are the natural pigments that give carrots, tomatoes, pumpkin, capsicum and leafy greens their orange, red and yellow tones. Familiar ones include beta-carotene, lutein, zeaxanthin, lycopene and beta-cryptoxanthin. When you eat carotenoid-rich foods, these compounds circulate in the blood and gradually deposit in the skin, where they can subtly shift skin colour toward a warmer, more golden tone. Researchers can even measure skin carotenoids with a simple reflectance reading, using it as a marker of how much fruit and vegetable a person tends to eat.

What the human research actually shows

A 2025 validation study followed 50 Australian adults and compared their reported diets with blood and skin measures. Higher dietary carotenoid intake was positively associated with both plasma carotenoid levels and skin yellowness, for nearly every carotenoid measured, with lycopene the exception (Clarke et al., 2025, PMID 40522063). This was a small observational study, so it shows an association, not proof that eating carotenoids causes a visible glow.

A separate 2026 cross-sectional study of 210 Japanese workers found that skin carotenoid levels were positively associated with how many vegetable dishes and how frequently fruit people reported eating (Okada and Takimoto, 2026, PMID 41683372). Two studies in different populations pointing the same way is encouraging, but both are observational snapshots rather than controlled trials.

Where diet and beauty support meet

The takeaway is not a single miracle food. It is a colourful, varied diet built on real produce. The carotenoid research above is about food, so the most reliable approach is simple, everyday eating habits.

Fill half your plate with colour: orange, red, deep green and yellow vegetables and fruit.
Spread intake across the day rather than one big serve.
Pair produce with a little healthy fat, since carotenoids are fat soluble.
Some people also use ingestible beauty products, such as a collagen powder, as part of their daily routine; note the research above is about dietary carotenoids, not collagen.
Keep expectations realistic: any dietary shift in skin tone is gradual and subtle.

The topical side: antioxidants on the skin

Diet works from the inside, while topical antioxidants work at the surface. Vitamin C is one of the most studied. In a small 2026 split-face trial of 31 adults, a serum combining vitamins C and E with ferulic acid, used alongside an in-clinic microneedling protocol, showed greater improvement in signs of photoageing than placebo (split-face trial, 2026, PMID 41710525). That was a small clinical study in a procedure setting, so results will not translate directly to everyday home use, but it reflects why this ingredient trio is popular.

If you want a vitamin C and ferulic acid serum for your morning routine, Medik8 C-Tetra 30ml is one vitamin C serum you could try, though no home serum has been shown to match an in-clinic procedure.

The bottom line

Current evidence links carotenoid rich eating with measurable carotenoids in the skin and a warmer skin tone, which many people read as a healthy glow. The studies so far are small and observational, so think of colourful food and topical antioxidants as complementary habits rather than guaranteed outcomes. If you also enjoy an ingestible beauty product such as Adashiko Pure Collagen Powder, treat it as part of your daily routine rather than something backed by the carotenoid research here. A good plate and a good serum can work side by side.

Disclaimer: This article is for general information only and is not medical advice. The studies cited are from peer-reviewed journals and are provided for educational context. Individual results vary. Speak with a qualified healthcare professional or dermatologist before changing your routine. Verdo Cosmetics makes no therapeutic claims about the products or services mentioned.

Frequently asked questions

Can eating more fruit and vegetables really change my skin tone?

Human observational studies link higher carotenoid intake and higher fruit and vegetable intake with more carotenoids in the skin and a warmer, more yellow skin tone. These studies show an association, not proof of cause, and any change is gradual and subtle rather than dramatic.

What foods are highest in carotenoids?

Carrots, pumpkin, tomatoes, capsicum, sweet potato and leafy greens are common sources. A varied, colourful mix of vegetables and fruit gives you a range of carotenoids such as beta-carotene, lutein, zeaxanthin and beta-cryptoxanthin.

Do I still need topical skincare if I eat well?

Yes. Diet works from the inside while topical products work at the skin surface, so they are complementary. A vitamin C serum like Medik8 C-Tetra is a popular antioxidant option for a morning routine, though a home serum has not been shown to match an in-clinic procedure.

Will a collagen supplement give me a glow?

The carotenoid research covered here is about dietary carotenoids from fruit and vegetables, not collagen, so it does not support any collagen benefit. An ingestible product like Adashiko Pure Collagen Powder can simply be part of a broader daily routine alongside a colourful diet and topical care, not a standalone fix.

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