Short answer: most people notice less shedding within one to three months, and visible thickness improvements between three and six months of consistent daily use, because hair grows in cycles rather than overnight.
Why it takes this long
Each hair follicle cycles through growth, rest and shedding phases over months. A supplement can only influence hair that is currently in or entering its growth phase. It cannot speed up hair that has already fully grown out.
The realistic timeline
Weeks 1 to 4: no visible change yet, nutrients are being replenished internally.
Months 1 to 3: reduced shedding is usually the first sign.
Months 3 to 6: visible improvements in fullness and thickness.
Month 6 onward: continued growth and maintenance with ongoing use.
What slows results down
Inconsistent daily use, an unaddressed underlying cause such as an untreated thyroid issue, and very advanced thinning before starting.