What the scalp microbiome is
The scalp is home to a community of microorganisms — mainly Cutibacterium and Staphylococcus bacteria and Malassezia yeast. In balance, they coexist harmlessly and even help protect the scalp. When the balance tips — usually Malassezia overgrowing — you get dandruff, itch, and irritation. The goal isn't a 'sterile' scalp; it's a balanced one.
What disrupts the balance
Harsh sulphate shampoos that strip the scalp, over-washing or under-washing, heavy product build-up, excess sebab feeding yeast, stress, climate, and diet all shift the microbiome. Aggressive 'anti-dandruff' overuse can also backfire by disrupting the helpful bacteria along with the yeast.
How oils fit in — helpful and harmful
Oils are a double-edged tool. Helpful: antimicrobial oils like neem and diluted tea tree can curb Malassezia overgrowth; light oils like jojoba support the scalp barrier without feeding yeast. Harmful: heavy oils (coconut, especially) left on long-term can feed Malassezia and worsen a fungal-prone scalp. Match the oil to the scalp state.
A balanced scalp routine
Wash regularly enough to remove excess sebum and build-up — usually every 2–3 days — with a gentle, ideally sulphate-free shampoo. If you're fungal-prone, use neem or tea tree in rotation, not constantly. If your scalp is dry and the barrier is weak, light jojoba massage supports it. Don't over-treat: aggressive products daily can disrupt the helpful microbes.
Microbiome balance and hair growth
A chronically inflamed, imbalanced scalp is not a good environment for the hair follicle — persistent inflammation and itch can contribute to shedding. Supporting microbiome balance — gentle washing, the right oils used correctly, less harsh product overuse — creates better conditions for the follicles you have. It's foundational scalp care, not a growth treatment by itself.