1. Direct damage
Damage to cellular molecules such as DNA.
Photoprotection: The Importance of Diet
The Contribution of Integrative Medicine
Photoprotection does not end with the application of sunscreen.
The skin's response to UV-induced stress is strongly influenced by an individual's nutritional and metabolic status. Although the skin is a boundary organ, it continuously responds to systemic influences originating within the body.
Sunlight, Oxidative Stress and Nutrition
Solar ultraviolet radiation can damage skin cells in two ways:
2. Indirect damage
Formation of reactive oxygen species (free radicals).
The balance between oxidative stress and the body's antioxidant defence systems largely determines the extent of biological damage, including:
Inflammation
Premature skin ageing
Pigmentary disorders
Poor nutrition may further amplify these harmful effects.
The Role of the Mediterranean Diet
The Mediterranean diet is an excellent dietary model for supporting the skin's natural defence mechanisms because it is rich in:
Polyphenols
Carotenoids
Antioxidant vitamins C and E
Omega-3 fatty acids
These nutrients act synergistically to improve the skin's resilience to oxidative stress.
Hydration, the Gut and the Skin
Dehydration and intestinal dysbiosis may promote a systemic inflammatory state that can also affect the skin.
An integrated approach to photoprotection should include:
- adequate hydration;
- regular consumption of dietary fibre;
- limiting alcohol intake and refined sugars.
A Skin-Friendly Diet: Prefer
- seasonal fruit and vegetables;
- extra virgin olive oil and seed oils;
- chia seeds, flaxseeds and soybeans;
- nuts, including almonds, pistachios, walnuts, pine nuts, pecans, Brazil nuts, cashews and hazelnuts;
- oily fish and microalgae, such as Schizochytrium, Chlorella, Spirulina, Nori and Wakame;
- whole grains.
Limit
- simple sugars;
- ultra-processed foods;
- alcohol, especially during periods of sun exposure.
Dietary Supplements: When Can They Be Useful?
In individuals with particularly high sun exposure or increased oxidative stress, targeted antioxidant supplementation may be considered under medical supervision.
Dietary supplements are not a substitute for a balanced diet; they should be regarded only as selective nutritional support.