กรดเอลลาจิก: ปลดล็อกพลังต้านอนุมูลอิสระและไวท์เทนนิ่งในผลิตภัณฑ์ดูแลผิว

1. What is Ellagic Acid?

Ellagic acid is a naturally occurring polyphenolic compound (C₁₄H₆O₈) with a molecular weight of 302.20, found in berries (e.g., raspberries, blueberries), pomegranate peel, green tea, and gallnuts. It appears as a white to gray-brown powder with a high melting point over 360℃ and is slightly soluble in water and ethanol.

This dimer of gallic acid demonstrates strong bioactivity, especially in skincare, due to its antioxidant and melanogenesis-inhibiting properties. It exists both in free form and as part of ellagitannins in nature.

2. Antioxidant Effects of Ellagic Acid

Ellagic acid exhibits powerful antioxidant activity, up to 50 times more potent than Vitamin E, by:

Neutralizing free radicals
Inhibiting lipid peroxidation
Reducing DNA oxidative damage
Preventing oxidative stress-induced aging

Its catechol structure allows it to form stable quinone derivatives via intramolecular hydrogen bonding, enhancing radical scavenging capacity. It also chelates metal ions (e.g., Fe²⁺, Cu²⁺), reducing their catalytic role in oxidative reactions. These effects help protect skin cells from UV radiation, pollution, and other external aggressors.

3. Skin Whitening Mechanism

Ellagic acid inhibits tyrosinase, a key enzyme in melanin synthesis. Studies show it can:

Act as a tyrosinase substrate, competitively reducing its activity
Downregulate melanin production in melanocytes
Block melanin transfer to keratinocytes
Lighten pigmentation and reduce UV-induced skin darkening

In a study involving guinea pigs, topical application of ellagic acid significantly reversed UV-induced hyperpigmentation after 4 weeks.

4. UV Absorption and Anti-Inflammatory Benefits

Ellagic acid also offers natural UV protection, with strong absorbance between 220–300 nm and a secondary peak at 320–380 nm, shielding the skin from UVA and UVB damage. Additionally, its ต้านการอักเสบ effects help reduce redness, irritation, and inflammation-related pigmentation such as melasma.

Compared with traditional whitening agents like kojic acid, ellagic acid shows greater stability, efficacy, and lower irritation potential, making it ideal for long-term use.

5. Recommended Usage & Application

รูปร่าง	แอปพลิเคชัน
Serum / Essence	1–2 times per day (AM/PM)
Cream / Lotion	After cleansing and toning
Spot Treatment	On hyperpigmented areas

Suitable for all skin types, especially those with dull skin, dark spots, or sun damage. Sensitive skin users should conduct a patch test before full use.

6. Where to Buy High-Purity Ellagic Acid?

Supplier:
บริษัท เทคโนโลยีการลงทุน Shaanxi Zhonghong จำกัด
A professional manufacturer of plant-based bioactives, offering high-purity Ellagic Acid powder for cosmetic, pharmaceutical, and nutraceutical applications.
Contact for bulk quotation and COA