Pomegranate (Punica granatum) has been on the radar of longevity and women's health research for decades, with a concentration of studies that few foods can match. What makes it especially interesting is not only its richness in polyphenols, but the specific metabolism these polyphenols give rise to in the human body: urolithins, which have recently emerged as one of the compounds of greatest interest in cellular longevity.
Ellagic acid and urolithins: what they are and how they work
Ellagitannins—hydrolysable tannins abundant in pomegranate—are metabolized in the large intestine by microbiota action into ellagic acid and subsequently into urolithins (urolithin A, B, and C). Urolithins are the actual bioactive metabolites that are absorbed and act systemically; ellagitannins themselves have very low direct bioavailability.
Urolithin A has received special attention in recent years for its role in activating mitophagy—the process of clearing and renewing damaged mitochondria—which directly links it to cellular longevity mechanisms. Ellagic acid has direct antioxidant activity, documented anti-inflammatory activity, and the ability to inhibit tyrosinase—the enzyme involved in melanin synthesis—which explains part of its interest in the context of hyperpigmentation.
What research says about pomegranate and skin
Studies on pomegranate extract and skin show results mainly in three areas: protection against photodamage (reduction of markers of UV-induced oxidative damage), anti-inflammatory activity (reduction of proinflammatory cytokines in skin models), and effect on hyperpigmentation (inhibition of tyrosinase and reduction of melanin synthesis).
Jang et al. and other researchers have documented the photoprotective activity of pomegranate extract in studies with cell models and in human volunteer trials. The tyrosinase inhibitory activity of ellagic acid is one of the most studied mechanisms in relation to the nutricosmetic treatment of hyperpigmentation due to photodamage.
Photodamage, hyperpigmentation, and oxidative stress: the evidence
The relationship between ellagic acid and hyperpigmentation has a well-described mechanism: tyrosinase inhibition reduces the conversion of tyrosine to melanin, the process that produces excessive skin pigmentation. This activity is comparable, according to some studies, to that of kojic acid, a benchmark topical depigmenting agent. Orally, the effect is more diffuse and systemic, but it contributes to the biochemical context that favors a more homogeneous distribution of pigmentation.
Why the percentage of ellagic acid matters more than the gross weight
A pomegranate extract can contain different concentrations of ellagic acid depending on the extraction and standardization process. A 10% ellagic acid extract at 200 mg provides 20 mg of active ellagic acid. A 40% extract at 50 mg provides 20 mg of active ellagic acid. The same active ingredient, the same result. What matters is the amount of standardized active ingredient, not the gross weight of the extract. LEVIAL includes pomegranate with 40% ellagic acid (20 mg/vial), a functional dose with traceability.
