How these guides are written

Who writes this

The guides are written and maintained by the Kera team at Jazz Games, the studio that makes the Kera app. There is no medical board behind them and we are not going to invent one. What we have is a product built around hair routines, a lot of time spent in the research on hair fibres and scalps, and an editor who removes any sentence that cannot be supported.

How we handle evidence

Hair research is uneven. Some questions — what bleach does to the cuticle, how fast hair grows, why heat damages keratin — are settled well enough to state plainly. Others, including most of what is sold as a growth treatment, rest on small studies, short trials, or nothing at all.

So the guides do three things. They say what is well established. They mark thin evidence as thin, naming the size and shape of the study rather than hiding behind "studies show". And when the honest answer is that nobody knows, that is the answer we print, even when it makes for a worse headline.

What this is not

None of it is medical advice. Hair loss can be a symptom of thyroid disease, iron deficiency, autoimmune conditions, and side effects of medication, and no website — and no app — can tell you which. Sudden shedding, patchy loss, a painful or bleeding scalp, or anything that changes quickly is a reason to see a doctor or a dermatologist rather than to read another article.

No product rankings, no affiliate links

We do not run "best shampoo" lists, we do not take payment for a mention, and there are no affiliate links anywhere on this site. Products appear only as examples of a category, never as a recommendation to buy a specific bottle. The commercial relationship here is simple and visible: we make an app, and we would like you to try it.

Corrections and updates

Every guide carries the date it was last updated. When we get something wrong, we change the page rather than quietly deleting it. If you spot an error, write to hello@jazzgames.net — it is read by the people who write these.

On AI

We build an app whose analysis runs on AI, so it would be strange to pretend otherwise: AI tools are part of how this site is drafted and maintained. Nothing goes up unread. The structure, the claims, the hedges and the refusals to claim are decided by people, and any sentence we would not defend in an email is cut before it reaches the page.