Redken Extreme Length Leave-In Treatment with Biotin for Hair Growth & Split End Prevention

Grow Longer, Stronger Hair with Redken Extreme Length Leave-In

This biotin-infused leave-in conditioner is designed for damaged and weak hair that’s ready to grow beyond its current length. Built on Redken's Length Care Complex, the formula blends Biotin and Soy Protein to help fortify the hair shaft, supporting longer, more resilient strands over time.

Applied daily as a lightweight leave-in, it smooths the cuticle, reduces friction during brushing, and leaves hair feeling more manageable with each use. When used as part of the complete Extreme Length regimen (shampoo, conditioner, and leave-in), many users report noticeable improvements in breakage and the appearance of split ends—without sacrificing softness or shine.

In testing, the full Extreme Length system achieved meaningful results: up to 81% less breakage and up to 78% fewer visible split ends, compared with baseline conditions. This indicates the potential for longer, healthier-looking hair when the system is used together as intended.

Key Benefits at a Glance

• Strengthens damaged hair with Biotin and Soy Protein
• Supports smoother, more manageable strands with reduced friction
• May help reduce breakage and visible split ends when paired with the full Extreme Length system
• Leaves hair feeling glossy, hydrated, and resilient
• Designed to work from root to tip for improved overall hair health

How to Use

• Apply a small amount to towel-dried lengths and ends, avoiding heavy roots
• Distribute evenly with a wide-tooth comb or fingers
• Do not rinse; style as usual for daily protection and manageability

Why Choose Redken Extreme Length

• Formulated with Redken’s Length Care Complex, featuring Biotin and Soy Protein
• Leaves hair feeling smoother, shinier, and more resilient against styling stress
• Pairs with the full Extreme Length system for the best-longer-hair potential