Hair Mask for Breakage in India: 5 Science-Backed Reasons Hair Loses Protein

Hard water roughens the cuticle. Many urban homes in India use water high in calcium and magnesium, whether it comes from a borewell or a municipal supply in cities such as Bengaluru and Chennai. Minerals can settle on the hair shaft, leaving it rougher and less shiny. Published research on whether hard water reduces hair tensile strength is mixed; the effect may depend on water hardness and hair porosity. What you can feel is the snagging. Rough strands catch on each other, and that friction can lead to breakage.

Monsoon humidity keeps hair swelling and shrinking. In Mumbai, Kolkata, Chennai and Kochi, hair can spend months absorbing moisture from humid air, then releasing it as it dries. Those repeated changes are called hygral fatigue. They can lift the cuticle and wear on the cortex beneath it. Coloured, chemically treated or heat-damaged hair is more porous, so it can swell more during the monsoon months.

Heat and salon treatments put bonds under strain. Straighteners, blow-dryers, colour, keratin smoothening and rebonding all change the hair's structure. Heat and chemical processing can disrupt the bonds that help hold keratin together, and repeated sessions can leave strands weaker.

Wash day can be harder on hair than the oiling. Hot rinses, vigorous double-shampooing, rough towel-drying and brushing wet hair add stress when strands are easier to stretch and snap. Pre-wash oiling itself is not necessarily the problem: research on coconut oil found it can reduce protein loss during washing. If removing a heavy coat of oil takes an aggressive wash, though, that wash may undo some of the benefit.

Damage builds between salon visits. Shampoo and conditioner may be the whole routine for weeks at a time, while hard water, humidity, heat and chemical treatments keep wearing on the lengths. By the time breakage is obvious, the strand has usually been through more than one rough wash day.

What protein repair can do

Watch how your hair behaves when wet. Protein-depleted strands may feel gummy or mushy, stretch without springing back, or snap when stretched. You might also notice dullness, rough mid-lengths and split ends along the hair.

Protein-repair products use smaller, hair-compatible protein fragments to help worn areas of the strand. Hydrolyzed keratin, a broken-down form of hair's main structural protein, can bind to damaged patches on the surface. Collagen amino acids help hair flex under tension, while elastin supports stretch and recovery. You will find these ingredients across cleansing products, treatment masks and leave-in serums, but those products do different jobs: a mask treats the lengths, and a serum helps seal them afterward.

Nexxus, a salon-heritage haircare brand built around proteomic and lipidomic science, has organised its PROMEND range around cleansing, treating and sealing. Start with the PROMEND Repair Keratinizing Shampoo, a sulfate-free, gel-to-lather formula with hydrolyzed keratin and collagen amino acids. Nexxus says it "helps reduce protein loss by 80%" during washing. That is a brand claim, not an independently verified result. Work the lather into your scalp and let it run through the lengths as you rinse.

After shampooing, apply the PROMEND Repair Keratinizing Treatment Mask from mid-lengths to ends, leave it on as directed, then rinse. It contains hydrolyzed elastin, collagen amino acids and hydrolyzed keratin. Nexxus reports that the formula supports "62% bond generation" for stronger strands; treat that figure as a brand-reported guide, not a result everyone will get. Once or twice a week is a common starting point for damaged hair, though how often you need a protein mask depends on porosity and damage. If healthier hair starts to feel stiff, use it less often.

A couple of drops of PROMEND Oil Resurrection serum on damp or dry hair finish the routine. It combines keratin, collagen and elastin with a blend Nexxus describes as 89% pure oils, including jojoba, sunflower and squalane. The serum is designed to seal in the work of the shampoo and mask, rather than repair damage on its own.

The habits around those products count, too. A shower filter or a final rinse with filtered water can help with mineral buildup; a cool final rinse avoids another blast of hot water. Use heat protectant before hot tools, swap a rough cotton towel for a microfibre one, and try a gentler single wash after oiling instead of scrubbing through two shampoos.