Yes, onions contain keratin, although the amount is relatively small. While not a primary source of keratin for the body, onions do contribute to keratin levels.
Keratin Content in Onions
One cup of cooked onions contains approximately 10.2 mg of keratin. [Source](Reference showing 10.2mg of Keratin in cooked onions). It's important to note that our bodies primarily produce their own keratin, and dietary sources contribute only minimally.
How Onions Support Keratin Production
Several sources suggest onions contribute to keratin production, rather than being a direct source of significant amounts of the protein itself. This is linked to the presence of sulfur-containing compounds in onions. Sulfur is a crucial component in keratin synthesis. The antioxidant properties in onions may also support overall hair and skin health, indirectly influencing keratin-related processes.
- Sulfur Content: Onions are rich in sulfur, a key element in the structure of keratin. This sulfur content is suggested as a mechanism to enhance keratin production. [Source: Multiple references highlighting sulfur's role in keratin and onion's sulfur content].
- Antioxidant Properties: Onions possess antioxidants that may promote a healthy scalp and hair, which can indirectly impact keratin production and the overall integrity of hair and skin. [Source: Multiple references mentioning antioxidant properties of onions].
While onion extract is frequently included in hair products marketed for hair growth and improvement (often in combination with keratin), the direct keratin content of onions is relatively low. The benefits are more likely due to the sulfur content and antioxidants promoting healthy hair growth and structure.
