What is Keratin Protein?
Keratin is a fibrous structural protein that makes up hair, nails, and the outer protective layer of skin in humans and animals. It is extremely resilient and flexible, allowing keratin-rich tissues like hair to resist damage from regular use. Keratin contains a high concentration of the amino acid cysteine, which forms strong disulfide bonds in the protein structure and gives it mechanical strength and elasticity.
Benefits of Supplemental Keratin
Consuming keratin supplements has become popular due to claims that it can:
- Strengthen brittle nails
- Reduce hair loss and increase shine
- Improve skin elasticity and moisture retention
- Speed wound healing
- Ease joint and muscle pain
However, there is limited research on the efficacy and absorption of oral keratin supplements specifically. Much of the benefit for hair and nails may come from providing amino acids like cysteine rather than intact keratin protein.
Keratin Protein Shakes
Pre-made keratin protein shakes provide an easy way to consume supplemental keratin. They typically contain 10-20 grams of hydrolyzed keratin powder per serving dissolved into a flavored liquid.
Getting this protein from whole food sources can be challenging due to the limited number of keratin-rich foods. Therefore, these shakes aim to fill that nutritional gap.
Shakes may also contain vitamins, minerals, and other nutrients that support keratin production like biotin, zinc, and silica. Additionally, they often include beauty-boosting compounds such as collagen peptides for extra anti-aging and hair growth benefits.
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What foods contain high levels of keratin?
Foods richest in keratin include pork skin, chicken skin, fish skins, wool, hooves, and horns. But it may be difficult to get enough dietary keratin from whole foods alone.
How long does it take to see results from keratin supplements?
Improvements in hair, nails, and skin may take 2-4 weeks of consistent use. Benefits accumulate over time so continued daily use is important for the best effects.
Can too much keratin be harmful?
There are no established upper limits for keratin intake. But very high doses over 30-50 grams per day could potentially cause digestive upset in sensitive people.
Do keratin supplements interact with any medications?
Keratin is not known to negatively interact with most drugs. But check with your doctor before starting, especially if taking medicines that affect protein absorption or cysteine status.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a healthcare professional before starting any new treatment regimen.
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