Keratin is a type of protein that serves as a key structural component of the skin, hair, and nails. It provides strength and resilience, protecting these tissues from damage. Although keratin is not directly influenced by probiotics, a healthy gut microbiome can improve nutrient absorption, which may support keratin production and promote stronger, healthier hair, skin, and nails.

Signs and Advantages:
Healthy levels of keratin in the body result in strong hair, smooth skin, and hard nails. Deficiencies in keratin may manifest as brittle hair, dry or flaky skin, and weak, easily broken nails. Probiotics can indirectly support keratin production by improving digestion and the absorption of nutrients like biotin, zinc, and vitamins, which are essential for keratin synthesis.

Causes:
Keratin deficiencies can be caused by poor diet, nutrient malabsorption, or conditions like leaky gut syndrome, where the body struggles to absorb essential nutrients due to imbalanced gut bacteria. Taking probiotics can help restore gut health, which in turn supports the body's ability to maintain healthy levels of keratin.