What Happens If You Stop Using a Hair Serum?

On this page: the short answer · the hair you already have · is it like minoxidil? · what is known about stopping a serum · what decides it · what it asks of you · if you are stopping · if you stopped and want to start again · common questions · two things to take from this

The short answer

Stopping does not make the hair on your head fall out today.

That is the fear most people arrive with, and it has a clear answer.

Three things happen when you stop, and only one of them is the serum's.

Some people notice hair in the drain. Others notice a parting getting wider or a crown showing more scalp. Shedding and thinning are different problems, and this page is about both.

Underneath the fear there is usually a second question: how long am I signing up for, and what happens to my hair if I stop?

The hair you already have

Every hair grows from a follicle, a small pocket in the scalp. It grows for years, rests for a few months, falls out and is replaced, on its own timetable. The hair on your head this morning was grown over the months before today. What you can see and touch is already made, and stopping now does not reach back into it. The fear people describe is usually of something sudden, and this isn't sudden.

What stopping or carrying on changes is the hair that has not started growing yet. That is slower, which is why a serum is judged in months rather than weeks.

Is it like minoxidil?

Two people asked us this on Instagram, nine weeks apart.

Minoxidil's label says what happens when you stop. A serum is sold as a cosmetic, and a cosmetic does not have to say anything about stopping, so almost none do. This page does, for Alpha, the serum we make.

The minoxidil 2% label says three things. Continued use is needed to keep the regrowth. If you stop, the normal hair loss process will start again. And you will probably lose the newly regrown hair in three to four months.¹ That's the manufacturer, on its own label.

Separately, one published study measured what happens after people stop the drug: ten men, in a study published in 1987, who had used minoxidil 2% or 3% for at least four months. Most of the hair the drug had grown was lost after stopping, and four of the ten ended up with fewer hairs in the area counted than they started with.² There was no group without the drug to compare against.

That label belongs to minoxidil, not to a serum. Minoxidil is one active. Alpha is a formulation of several, aimed at more than one part of the problem, and the label and the 1987 study say nothing about a serum.

This page states ours: the routine, the terms, and what is and is not known about stopping.

How the two compare on evidence for growing hair is a different question. The studies behind each one are set out side by side on its own page.

What is known about stopping a serum

I went through the trials I could get hold of on hair products applied to the scalp. They include a published one behind Anagain, one of the five patented actives in Alpha, and one on a scalp and oral combination containing three of the compounds in Alpha. They ran from two weeks to three months, and they measured hair while the product was being used. The last measurement was taken on the last day of use, however long the study had run.³ What each active was studied for is on the ingredients page.

So nothing I read measured a serum after stopping. Nothing in those studies shows results fading, and nothing shows them staying. Anyone who tells you a serum's results fall away is going beyond those studies, and I would be going just as far if I told you ours hold.

What I have instead is reasoning, and I'm going to call it that.

Alpha is five patented actives with botanicals around them. The formula is aimed at several parts of the problem at once: a hormone called DHT, the blood supply to the follicle, how firmly a hair is held in the scalp, how many follicles are growing rather than resting, and the condition of the scalp itself. What each active is in the formula for is on the ingredients page.

That matters for stopping. A follicle that is growing today keeps growing whether or not you put anything on your scalp tomorrow, because it finishes its own cycle. So what happens after you stop depends partly on where your scalp had got to by the day you stopped, and a formula aimed at several parts of that picture is aiming at more of it than a single active is.

So there is a reason to expect a serum and a drug to behave differently on the way out.

What decides it

The cause of the loss decides what happens next, far more than which bottle you put down.

Thinning usually traces back to one of two things. Between them they cover most people, though they are not the whole picture, and they give very different answers to how long this asks of you. Most people do not know for certain which one they are. Finding out is a better use of the next month than deciding whether to stop, so if nobody has checked your iron or your thyroid, start there.

If it is the inherited kind, a sensitivity to DHT, the sensitivity doesn't go away.

DHT is a hormone. Sensitivity to it usually looks like gradual thinning at the parting or the crown rather than hair coming out in the shower, and it often shows up or speeds up around menopause. The timing alone does not settle it, because those are also the years when low iron and thyroid trouble are most common in women. It is settled by examination and blood tests. There's no course you finish and walk away from.

Stop, and the building stops: the new work at the follicle ends, the hair you already have keeps its own cycle, and what was driving the thinning is still there.

Many customers who paused tell us their results held. That is what they report, not a measurement. This is where that second question really bites, so it is answered next.

If a one-off event set your shedding off, you were probably never signing up for forever.

An illness, a birth, a hard few months, a stretch of low iron. Its name is acute telogen effluvium, the short kind. It means shedding that lasts under six months, counted from when the shedding began, not from the birth or the illness that set it off. A standard clinical reference, StatPearls, describes it as harmless and settling on its own.⁴ If that is you, the recovery was mostly coming once the cause was dealt with. The shedding stops first and the thickness comes back months later, so a parting that has not filled in yet is not the same as one that never will.

A birth is the most common trigger our customers name, and plenty of them came to Alpha in the months afterwards. If you are pregnant or breastfeeding, ask your doctor before putting anything on your scalp, ours included.

If your shedding has been going for longer than six months, it is not the short kind. Shedding that runs on has several possible causes, and one of them is called chronic telogen effluvium, the long kind. They are told apart by examination and blood tests, so that is a doctor's question. Ask about iron, thyroid and PCOS, a hormone condition, by name. The rest of what to raise is listed on the shedding page.

If your hair is coming out in patches, speeding up month on month, or your scalp is sore or red, the full list of when to see a doctor takes two minutes to read.

What it asks of you

For the inherited kind, what you want is a level you would keep up.

In what customers tell us, people rarely stop because they decided it had failed. They stop because a bottle ran out and was not replaced in time, or because the routine slipped without anyone deciding it should. That is the shape to plan around.

Alpha's terms are simple. Three sizes, and a subscription whose only commitment is the first order plus one repeat. After that you pause, change or stop from your account.

We recommend twice a day, morning and night. Our results page lists customers who applied once daily, twice daily, every other day and every two days. Those are what customers reported. Frequency changes how long a bottle lasts.

Applied once a day, each one lasts roughly twice as long. Spread across most of the scalp rather than a parting or a crown, each one lasts roughly half as long. A widening parting and a thinning crown together still count as a small area, not the whole scalp.

On subscription it is 20% off the first order and 10% off the ones after. On the 2x50ml that brings the ongoing price to SGD 202.50. Across four months that is about SGD 1.69 a day. The 25ml plan is monthly, and on the 50ml and the 2x50ml you choose the interval yourself.

The 25ml is the smallest way in. Most customers who carry on are on the 50ml or the 2x50ml, and if you already know this is your kind of thinning I would start there.

Pick a size and a frequency you would still be keeping up at month four. One bottle is where the early signs show, when they show. Those are shedding settling down and new baby hairs. One bottle is about half of what a change in thickness needs. One bottle now and a second one months later tells you less than two used back to back.

If you are stopping

Photograph your parting before you stop, and write the date on it. The same is true if you are starting: day one is the only day you can still get a before.

Same light, same parting, thirty seconds. It is the thing most likely to tell you anything later, and almost nobody does it on the way out, because stopping doesn't feel like a moment worth recording.

Then wait. The weeks straight after you stop tell you very little, the same as the weeks after you began. If you want to know what the serum was doing, compare a photograph from three months before the date with one from three months after.

If you are stopping, you are in a better position than when you started. You have dated photographs, and if you have had the blood tests done you have a list of causes already ruled out. A doctor will ask for both.

If you stopped and want to start again

If the question is how long to give it from the beginning, what the studies measured, month by month, is on the page about how long a serum takes.

If you kept photographs and dates the first time, they still count. If you did not, and most people do not, then there is no way to read the first attempt now. What you can do is make the second one readable, which takes about thirty seconds on day one, and pick a size you can hold for longer than last time.

Common questions

Will I lose the hair I grew?

What is on your head keeps running its own cycle, and stopping doesn't make it fall out. The serum's new work at the follicle stops. What happens from there depends mostly on what was causing the thinning.

Can I use less instead of stopping?

Applying less often is worth trying before you stop, and it is the better answer if the routine has become hard to keep. Our results page lists four frequencies customers report, from once daily to every two days. The three sizes and how long each lasts are set out above.

How long before anything changes after I stop?

For minoxidil the 2% label says three to four months, and that is the manufacturer's own number, from its label. For a serum I have no figure to give you, because the studies I read stop measuring on the day people stop applying. Ask where any number you are quoted for a serum came from.

My shedding has been going on more than six months. Where does that leave me?

Past six months it is no longer the short kind. From there it is told apart by examination and blood tests. If you have not had them, ask for ferritin, which is the iron your body holds in reserve, and for thyroid by name.

You can also write to us at chloeya@chloeya.com. We cannot diagnose anything and we will not pretend to. What we can do is tell you what customers with the same picture have described, and what is worth asking your doctor for.

I stopped months ago. Was it wasted?

You have what you learned about your own hair, and if you took photographs you have the record too. If you do start again, take the photograph on day one this time, and pick a size you can keep up. The three sizes and the subscription terms are above.

Two things to take from this

The only commitment here is the first order plus one repeat. What happens after you stop is the part I could find no measurement of, in either direction. What can be known is what happens while you use it, and whether you would keep using it.

So why make a serum at all, knowing all of that? Hair loss is rarely driven by one thing, so Alpha was never built around one. The five actives are Capixyl, Procapil, Redensyl, Anagain and RootBiotec, with botanical extracts in the base around them. Your iron, your sleep, the stress of the last two years, whatever a blood test would turn up: none of that is in a bottle. Alpha works at the follicle, and that is the part I can be exact about.

What our customers describe, in their own words and photographs, is on the results page. Many of them say how much of the bottle they had used when they first noticed something. Alpha, and the three sizes it comes in, is on the product page.

Important: This article is for information and is not medical advice. Hair loss has many causes and several are better answered by a blood test than by any product. If your hair is thinning suddenly, coming out in patches, or if your scalp is sore, red or itchy, see a doctor or a dermatologist.

Sources

1. Minoxidil topical solution 2%, United States over-the-counter labelling and consumer information, NDA 019501.
2. Olsen EA, Weiner MS. Topical minoxidil in male pattern baldness: effects of discontinuation of treatment. Journal of the American Academy of Dermatology 1987, 17(1): 97-101. PMID 3301926.
3. Grothe T, Wandrey F, Schuerch C. Short communication: clinical evaluation of pea sprout extract in the treatment of hair loss. Phytotherapy Research 2020, 34(2): 428-431, published online 2019. DOI 10.1002/ptr.6528, PMID 31680356. Topical arm 10 subjects over 2 weeks, oral arm 21 enrolled and 19 completed over 8 weeks, neither placebo-controlled, funded by Mibelle AG. · Majeed M, Majeed S, Nagabhushanam K, Mundkur L, Neupane P, Shah K. Clinical study to evaluate the efficacy and safety of a hair serum product in healthy adult male and female volunteers with hair fall. Clinical, Cosmetic and Investigational Dermatology 2020, 13: 691-700. DOI 10.2147/CCID.S271013. Open-label, no control arm, 46 screened and 42 completed, 90 days, 10 visits, funded by Sami Labs. · Voiculescu VM, Lupu M. Comparative study of a topical and oral combination therapy containing oleanolic acid, apigenin, and biotinyl tripeptide-1 in patients with androgenetic alopecia: a prospective, open-label trial. Cosmetics 2025, 12(4): 152. 60 enrolled and 48 completed, readings at baseline and 3 months only. The authors state that monthly rates of change were calculated and then "applied to extrapolate values at 6 months (T6) and 12 months (T12)".
4. Telogen Effluvium. StatPearls, NCBI Bookshelf NBK430848.