Arkely · Haircare
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Patented bioactive peptide and amino acid sequence that penetrates deep into the inner cortex, reconnecting broken polypeptide keratin chains in 4 minutes.
Best for: Severe bleach damage, restoring internal hair elasticity, and molecular repair
Check current price on AmazonThe groundbreaking bond-builder that relinks broken disulfide cystine bonds within damaged hair keratin, transforming brittle strands into resilient silk.
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Check current price on AmazonCombines caviar extract and biomimetic protein peptides that rebuild damaged hair cuticles while sealing in moisture for luminous shine.
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Check current price on AmazonA clean 97% naturally derived mask blending B-vitamins, rosehip oil, and silk amino acids that boosts hair elasticity and strength by up to 86%.
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Check current price on AmazonFast Facts
Expert Technique & Theory
To understand hair product labels, you must understand molecular scale. Un-hydrolyzed keratin is a massive fibrous macromolecule with a molecular weight often exceeding 50,000 Daltons (Da). The intercellular spaces in a healthy hair cuticle are only 10 to 50 nanometers wide. Intact keratin cannot physically penetrate inside the hair shaft; it acts as a sacrificial surface coating that fills jagged cuticular chips and shields against heat.
Amino acids are single monomeric units with molecular weights typically under 150 Daltons (e.g., Glycine is 75 Da; Alanine is 89 Da). Because of their minuscule size, free amino acids slip effortlessly through the cuticular barrier into the deep cortex, binding with water and reinforcing the internal hydrogen and ionic matrix.
If your hair feels stiff, dry, crunchy, and snaps easily when stretched gently between your fingers, you are suffering from 'protein overload'—the result of layering too many heavy keratin products. The hair has lost its elasticity.
If your hair stretches excessively like wet chewing gum and fails to bounce back, snapping in half, it is suffering from 'hygral fatigue' and severe protein deficiency. The fix: use heavy keratin masks for gummy, limp hair; switch to amino acid and moisture masks for stiff, dry hair.
The Evaluation Matrix
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The Ultimate Pick
Patented bioactive peptide and amino acid sequence that penetrates deep into the inner cortex, reconnecting broken polypeptide keratin chains in 4 minutes.
Best for: Severe bleach damage, restoring internal hair elasticity, and molecular repair
Check current price on AmazonQ&A Clarifications
To reverse protein overload, immediately stop using all products with the words 'keratin', 'collagen', 'soy protein', or 'wheat protein' on the label for 3 to 4 weeks. Wash your hair once with a clarifying shampoo, and saturate strands with protein-free deep moisturizing masks containing aloe vera, shea butter, and squalane.
Yes, but not at the exact same moment. Olaplex No. 3 is a pre-shampoo treatment that repairs disulfide bonds and must be shampooed out. K18 is a leave-in peptide treatment applied to clean, towel-dried hair with no conditioner. Use Olaplex on one wash day, and K18 on the next for comprehensive bond and peptide repair.
For moderately damaged or color-treated hair, once every 2 weeks is the sweet spot. For virgin, healthy hair, once a month is sufficient. Using intensive protein treatments weekly risks causing cuticular stiffness and premature breakage.
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