A Growing Category With a Growing Problem
As internal sun care gains popularity in the US, two very different types of products are being grouped together: photonutrition supplements and tanning supplements. Understanding the difference isn't just a branding question — it's a health question.
What Tanning Supplements Do
Tanning supplements are designed to produce a visible color change in your skin as quickly as possible. To achieve this, many contain ingredients that force melanin production regardless of UV exposure:
L-Tyrosine — an amino acid that stimulates melanogenesis. However, research shows that in fair-skinned individuals, forced melanogenesis can produce pheomelanin — the type of melanin that actually increases UV damage rather than protecting against it.
Preformed Vitamin A (Retinol) — included because it produces faster visible changes across all skin tones. But preformed retinol bypasses your body's natural regulation and accumulates in the liver. A landmark study in the New England Journal of Medicine found that above 10,000 IU daily, 1 in 57 babies were born with birth defects attributable to high vitamin A intake.
Copper — another melanogenesis stimulant that can cause liver toxicity with prolonged daily use.
What Photonutrition Supplements Do
Photonutrition takes a fundamentally different approach. Instead of forcing a visible result, it builds your skin's internal antioxidant defense through plant-based carotenoids — the same compounds that protect plants from UV damage in nature.
These carotenoids accumulate in skin tissue over weeks, creating a reservoir of protection. Any warm tone that develops is a natural byproduct of carotenoid deposition — not a forced melanin response. Research has shown that carotenoid-rich skin tones are consistently rated as healthier-looking than UV tans in perception studies.
The Manufacturing Difference
Most tanning supplements are manufactured as gummies, which require temperatures of 150°F or higher. At these temperatures, carotenoids — the very compounds that provide photoprotective benefits — degrade by 30-60% before the product is even bottled. Cold-process capsules avoid heat entirely, preserving full potency.
How to Tell the Difference
Check the supplement facts panel. If you see L-tyrosine, copper, or vitamin A listed as retinol or retinyl palmitate rather than beta-carotene — it's a tanning supplement, regardless of what the marketing says. A genuine photonutrition supplement uses carotenoid-based ingredients, avoids melanogenesis-forcing compounds, and cites published research.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.