Skin Health From Within: Nutrients for Radiance

Many of us are familiar with the multi-step skincare routines that crowd our bathroom shelves. However, modern scientific understanding is increasingly turning its focus towards 'nutricosmetics' — managing skin health from the skin's deeper structural layers. While premium creams and serums work on the outermost layers of the skin, the deep structural foundations of our complexion are built from the nutrients we consume. Nourishing these deeper layers through targeted supplementation may support natural cellular repair, hydration, and defence against environmental daily stressors.

How it works

To understand how oral supplements affect the skin, it helps to look at the skin's structure. The skin is divided into three primary layers: the epidermis on the outside, the dermis in the middle, and the subcutaneous tissue at the deepest level. Topical skincare products primarily target the epidermis, which acts as a protective barrier. While this is crucial for moisture retention and protection, topical creams often contain molecules too large to penetrate deeply into the dermis.

The dermis is where the structural proteins, collagen and elastin, are located. These proteins give the skin its firmness and elasticity. This layer is highly vascularised, meaning it is fed directly by blood vessels. When we ingest vitamins, minerals, and bioactive peptides, they are broken down in the digestive system, absorbed into the bloodstream, and delivered straight to the dermis. This internal path allows nutrients to support the skin's natural regeneration processes at a cellular level where topical treatments cannot reach.

Furthermore, the skin is an organ under constant renewal. Every 28 to 40 days, the cells in our epidermis are completely shed and replaced. Creating healthy new skin cells requires a steady supply of specific micronutrients. By ensuring these building blocks are readily available in the bloodstream, we can support the optimal quality of the new tissue being formed.

Evidence-based benefits

• Support for collagen production: Ingesting specific collagen peptides may support maternal skin elasticity and hydration by stimulating fibroblasts, the cells responsible for collagen synthesis. However, some clinical trials on collagen supplements have been funded by manufacturers, and results can vary depending on individual diet and age.
• Protection against oxidative stress: Vitamin C is a powerful antioxidant that helps protect skin cells from free radicals caused by sunlight and pollution, while also being essential for the internal synthesis of collagen. Nevertheless, taking oral vitamin C cannot replace the immediate protective benefits of applying a daily topical sunscreen.
• Maintenance of skin hydration: Omega-3 fatty acids, commonly found in fish oil and algae, support the skin's natural lipid barrier, which helps to lock in moisture and soothe dry skin. However, these supplements should be viewed as a supportive measure and cannot compensate for a diet lacking in healthy fats or insufficient water intake.
• Regulation of inflammatory pathways: Zinc is a vital mineral that assists in cellular division and wound healing, which may support clearer skin in those prone to breakouts. But, taking high doses of zinc over a long period can interfere with copper absorption in the body, so intake must be carefully monitored.
• Enhanced cellular defence: Coenzyme Q10 (CoQ10) is a natural antioxidant produced by the body that declines with age; supplemental CoQ10 may support cellular energy production in skin cells and combat premature ageing. Even so, the rate of oral absorption can be quite low, meaning visible improvements may take several months to appear.

How to take it / typical dose

When designing a skin nutrition routine, consistency is far more important than high doses. For general skin health, standard daily targets include 2.5 to 5 grams of hydrolysed collagen peptides, 80 milligrams of vitamin C to aid absorption, and 250 to 500 milligrams of combined EPA and DHA omega-3 fatty acids. These nutrients are best taken with a meal containing healthy fats to maximise the absorption of fat-soluble vitamins (such as vitamin E and CoQ10). We recommend integrating these supplements into your daily morning or evening routine for at least eight to twelve weeks, as this aligns with the natural cellular turnover cycle of your skin.

Safety and who should avoid it

While skin supplements are generally safe for the majority of people, certain individuals should exercise caution. Those with allergies must be particularly diligent, as marine collagen is derived from fish or shellfish, and some capsules use bovine or porcine packaging. If you are pregnant, breastfeeding, or taking blood-thinning medications, you must consult your GP before starting new supplements, particularly high-dose omega-3s or vitamin E. It is also important to avoid 'double-dosing' on vitamins like vitamin A, which can accumulate to toxic levels in the body if taken in excess through multiple products.

The bottom line

Nourishing your skin from within offers a powerful, scientifically backed way to complement your topical skincare routines. While oral supplements can support hydration, collagen structure, and cell renewal, they are most effective when paired with a balanced diet, adequate hydration, and direct sun protection.