Not All Internal Sun Care Is Created Equal
As photonutrition gains recognition in the US, more products are entering the market — and not all of them reflect the science the category is built on. Understanding what to look for (and what to avoid) on the supplement facts label helps you choose a product that's both effective and safe for daily use.
Look For: Carotenoid-Based Active Ingredients
The foundation of photonutrition is carotenoids — the plant pigments with 50+ years of published research supporting their role in skin health. Key carotenoids to look for include astaxanthin (from algae), lycopene (from tomato), beta-carotene, lutein (from marigold), and tocotrienols (from annatto). A formula that combines multiple carotenoids provides broader coverage across skin layers than a single ingredient.
Look For: Beta-Carotene as the Vitamin A Source
Check how vitamin A is listed. Beta-carotene (provitamin A) is the safe form — your body converts only what it needs and eliminates the rest. Preformed vitamin A (retinol, retinyl palmitate) bypasses this regulation and can accumulate in the liver with daily use. A New England Journal of Medicine study found birth defect risk above 10,000 IU of preformed vitamin A daily.
Avoid: Melanogenesis-Forcing Ingredients
L-Tyrosine forces melanin production. In fair-skinned individuals, this can produce pheomelanin — the type of melanin associated with increased UV damage. Copper similarly stimulates melanogenesis and can cause liver toxicity with prolonged supplementation. Neither ingredient aligns with the photonutrition approach of building antioxidant defense rather than forcing aesthetic changes.
Look For: Cold-Process Manufacturing
Gummy supplements require manufacturing temperatures of 150°F or higher. Carotenoids contain conjugated double bonds that degrade at these temperatures — studies estimate 30-60% potency loss during typical gummy production. Cold-process capsules preserve full carotenoid integrity because no heat is applied during manufacturing.
Look For: Published Research Citations
A credible photonutrition brand should reference specific published studies, not just vague claims about "clinical strength" or "dermatologist recommended." Ask: which studies? Published where? On which specific compounds? The research exists — brands that know it will cite it.
Look For: Transparent Inactive Ingredients
Check the "other ingredients" section. A clean formula will have minimal inactive ingredients — typically just the capsule material (hypromellose for veggie capsules), a flow agent (rice powder), and possibly magnesium stearate. Long lists of fillers, artificial colors, and binding agents are unnecessary in a well-formulated product.
Look For: Facility Certifications
Manufacturing matters. Look for GMP (Good Manufacturing Practice) certification at minimum. Higher-tier certifications like NSF Certified for Sport, FDA Drug Establishment registration, or pharmaceutical-grade manufacturing licenses indicate facilities that meet standards beyond the supplement industry baseline.
*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.