The hair in your drain in September was set in motion in July. Michael Kunz, Burkhardt Seifert and Ralph Trueb at the University Hospital of Zurich went through six years of trichograms from 823 otherwise healthy women who had come in complaining of hair loss and found the proportion of hairs sitting in their resting phase peaks in summer, with the low point in late winter. A resting hair holds for around three months before it lets go. The cause and the shed sit a season apart, which is why autumn feels like something new went wrong when nothing did.
Most of this stops by itself. Shedding that runs heavier for six to eight weeks and then settles is the pattern the Zurich data describes. Shedding that comes out in patches, arrives with a sore or scaling scalp, or follows an illness, a birth, a crash diet or a new prescription is one for a doctor.
Everyone else can sort the shelf into four groups. One of them regrows hair and has done since the 1980s: minoxidil, $30 to $50, sold under a dozen labels. One device category holds an FDA clearance for hair growth, and the clearance is narrower than the box implies. Two more things help around the edges. Everything else, the biotin gummies, the rosemary oil, the caffeine-peptide serums, works on the hair you still have.
Amazon Basic Care Minoxidil Topical Solution 5%
Minoxidil 5% w/v · 12 fl oz · dropper applicator · twice daily · men only · 4.2 stars, 7,635 reviews · ~$30
Amazon's store brand is the cheapest way to buy the only over-the-counter ingredient that regrows hair. Amazon's own listing tells you what it is competing with: compare to Men's Rogaine Extra Strength active ingredient. Same 5% minoxidil, twelve fluid ounces, thirty dollars.
- The same active ingredient as the brand at a fraction of the cost per month
- Twelve fluid ounces outlasts almost every competing pack size
- Sold through the Amazon Basic Care storefront, so no importer sits in the middle
- The dropper lets you place it on the scalp rather than the hair
- The listing states it is not for use by women
- Its own bullets limit the claim to the top of the scalp, vertex only
- A dropper takes longer than a foam and leaves hair wet
- Twice daily forever, because stopping gives the ground back
Minoxidil is the pick and this is the cheap way to own it. Amazon's listing describes minoxidil 5 percent w/v and points at the brand it copies. The molecule is the one Rogaine's own listing says it brought to market first, and the patent expired long ago.
The limits on the box are narrow. The bullets specify men with general thinning on the top of the scalp, vertex only, and state that this is not for use by women. Minoxidil was studied on a crown pattern and that is what it is labeled for. A receding front hairline is outside what this listing claims.
The dropper is the trade for the price. You part the hair, place the liquid on the scalp twice a day, and wait for it to dry before anything touches it. If that sounds tedious, the foam costs more per month and dries faster. Buying either one and stopping in March is the mistake. Minoxidil holds hair while you use it and gives it back when you quit.
Men's Rogaine 5% Minoxidil Topical Foam
Minoxidil 5% foam · three 2.11 oz canisters · three-month supply · twice daily · 4.2 stars, 28,181 reviews · ~$50
Rogaine puts the same 5% minoxidil in a foam that dries fast enough to use before work, and Rogaine invented the category. Rogaine's listing puts it directly: Rogaine is the inventor of minoxidil and the first brand approved for its topical use.
- 4.2 stars across 28,181 ratings
- Foam sits where you put it and dries faster than a dropper solution
- Three canisters arrive together, which covers the first stretch where nothing seems to happen
- Rogaine holds the original approval, so the formulation history is the longest here
- Roughly $17 a month against $10 or less for the same active in a bottle
- Twice daily, and the clock restarts if you stop
- The listing hedges to fullness and hair count on top of your scalp, not the hairline
Buy the foam if the liquid is the reason you would quit. The active ingredient is identical, and the difference is whether you keep up a twice-daily step. Rogaine's listing claims a blend of botanical extracts and nourishing emollients in the carrier. That is a claim about the carrier. The growth comes from the minoxidil either way.
More than 28,000 people have rated it, and 4.2 stars from that many buyers carries more weight than a high score from a few hundred.
Expect more shedding at first. Minoxidil pushes resting hairs out to make room for the ones it is starting, so shedding often increases for two to eight weeks before it drops below where it started. Judge it at four months. People who quit around week six stop during the stretch where it is working.
Women's Rogaine 5% Minoxidil Topical Foam
Minoxidil 5% foam · two 2.11 oz canisters · four-month supply · made by Kenvue · 4.1 stars, 31,712 reviews · ~$45
Rogaine labels this formulation for women, and 31,712 buyers have rated it. Kenvue claims hair 61 percent thicker in its own clinical testing, and the four-month box works out cheaper per month than the men's foam.
- 31,712 ratings, the most of any minoxidil here
- Four months in the box works out cheaper per month than the men's foam
- Labeled and sold for women, which the men's minoxidil solution is not
- Kenvue is the manufacturer on record, so a pharmaceutical company stands behind the supply chain
- The 61 percent thicker figure is Kenvue's own testing, not independent work
- Hereditary thinning is what it addresses, and other causes of shedding need a diagnosis first
- Same dependency as every minoxidil product: the result leaves when you do
The men's 5% solution in Pick I carries a line in its own bullets saying it is not for use by women. That line comes from how each product was approved. Buy the one labeled for you.
Kenvue's claim is the specific one on the listing: clinically proven to regrow hair that is 61 percent thicker. That number comes from the company's own testing, which is normal in this aisle. The underlying ingredient has independent evidence behind it. The percentage does not.
This cannot sort out why you are shedding. The listing names hereditary thinning, and hereditary thinning is a slow change in density over years. A shed that started eight weeks ago after a fever, a birth, a new medication or a hard diet is a different thing with a different course, and it usually resolves without buying anything. See someone before you commit to a treatment you have to keep doing forever.
Nizoral Anti-Dandruff Shampoo, 1% Ketoconazole
Ketoconazole 1% · 7 fl oz · Kramer Laboratories · 4.6 stars, 112,765 reviews · ~$17
Nizoral is the best-rated product on this page and the one with the clearest limits. Kramer Laboratories sells it as an anti-dandruff shampoo. Its listing makes no hair-growth claim, and neither will we.
- 112,765 ratings, more than everything else here combined
- The only over-the-counter shampoo with 1% ketoconazole, per its own listing
- Treats the flaking and scalp irritation that make shedding look worse than it is
- Seventeen dollars, and a bottle lasts months at two washes a week
- Sold for dandruff, not for hair growth, and the listing claims nothing about regrowth
- Any hair benefit is off-label and rests on limited published work
- It does nothing for hereditary thinning by itself
This one earns its place by fixing a different problem. An inflamed, flaking scalp sheds more and looks worse doing it, and the shampoo that kills the fungus behind dandruff helps with both. Nizoral's listing describes killing the fungus that causes dandruff, and that is the claim we are buying.
The hair-growth use is off-label. Ketoconazole shows up in hair-loss routines because a small body of published work has looked at it alongside minoxidil, and the results are limited enough that no manufacturer puts a growth claim on the bottle. Nizoral doesn't make one either.
It is the cheap half of a routine and minoxidil is the half doing the work. Two washes a week costs seventeen dollars a season and settles the scalp, which makes it easier to tell whether the minoxidil is doing anything. If your scalp is calm and flake-free already, skip it and spend the money on the supply of minoxidil you will need in month four.
iRestore Professional Laser Hair Growth System
282 lasers and LEDs · hands-free helmet · 25 minutes every other day · FDA cleared · 4.4 stars, 1,295 reviews · ~$899
iRestore's Professional rates best of the laser caps here and covers the most scalp, at $899. Its FDA clearance is narrower than the listings suggest.
- 4.4 stars across 1,295 reviews, the best record of any cap here
- 282 emitters cover hairline, sides and crown in one hands-free session
- FDA cleared under the agency's dedicated hair-growth device code, which is checkable
- Nothing to apply, so it stacks on top of minoxidil without a second daily step
- $899 buys 30 bottles of the $30 minoxidil
- The listing hedges to healthier fuller looking hair, which is a claim about looks
- Three to six months before anything is visible, per the brand's own estimate
- The iRestore Essential costs $400 less and rates 4.0
Buy this fifth, if at all. Light therapy for hair sits on real ground: the FDA maintains a dedicated product code for hair-growth lamps and lasers, and 112 devices have been cleared under it, iRestore's among them. That separates these caps from the rosemary oil.
Read what the clearance covers. HairMax, a competitor cleared under the same code, spells the indication out on its own Amazon listing: to promote hair growth in males with androgenetic alopecia who have Norwood-Hamilton classifications of IIa to V, and in females with Ludwig classifications I to II. That is a specific pattern at a specific severity, and caps that leave that sentence off their listings still carry an indication in their own clearance.
Price counts against it. $899 would buy about four and a half years of the Rogaine foam, and minoxidil has evidence going back to the 1980s. Buy the cap if you are already using minoxidil, have given it six months, want to add the other cleared mechanism, and can sit under a helmet every other day for another six. Buy it in that order.
The numbers.
| Basic Care | Rogaine Men | Rogaine Women | Nizoral | iRestore Pro | |
|---|---|---|---|---|---|
| Type | Minoxidil liquid | Minoxidil foam | Minoxidil foam | Shampoo | Laser helmet |
| Active | Minoxidil 5% | Minoxidil 5% | Minoxidil 5% | Ketoconazole 1% | Light |
| Claims regrowth | Yes | Yes | Yes | No | Cleared for it |
| Frequency | 2x daily | 2x daily | Per label | 2x weekly | Every other day |
| Rating | 4.2 stars | 4.2 stars | 4.1 stars | 4.6 stars | 4.4 stars |
| Reviews | 7,635 | 28,181 | 31,712 | 112,765 | 1,295 |
| Street price | ~$30 | ~$50 | ~$45 | ~$17 | ~$899 |
Other strong options.
iRestore Essential Laser Hair Growth System
iRestore sells this $499 cap too, cleared under the same code, rated 4.0 across 3,505 reviews against the Professional's 4.4 across 1,295. Fewer emitters and less coverage for four hundred dollars less. Pick it if you want into the device tier at the lowest price from a maker with a track record, and the wider review base is a fair argument for it over the Pro.
View on Amazon →HairMax Laser Band 41
HairMax's band costs $499, rates 3.9 stars across 196 reviews, and has the shortest session in the category: three minutes, three times a week, against twenty-five for a helmet. HairMax is also the only listing here that prints its FDA indication, naming Norwood-Hamilton IIa to V and Ludwig I to II. Read it before you buy any cap, including the ones that leave it out.
View on Amazon →Theradome EVO LH40 Laser Helmet
Theradome's helmet costs $530, is made in the USA, and uses laser diodes with no LEDs, which the listing argues is the point. It rates 3.5 stars across 171 reviews, the lowest score on this page. The laser-only design has a technical case behind it, and its buyers are the least satisfied of any device here, so weigh the engineering claim against what the owners report.
View on Amazon →Dr.FORHAIR Folligen Thickening Shampoo
This Korean scalp shampoo costs $28, rates 4.2 stars across 677 reviews, and its listing is a useful lesson in reading verbs. It claims reduced hair loss due to breakage, thicker fuller-looking hair, and improvement in the appearance of hair density. Breakage is hair snapping along the shaft, which is a different problem from hair leaving the follicle. Buy it as a good shampoo for thinning-looking hair and keep minoxidil for the shedding.
View on Amazon →Ryo Hair Strength Expert Care Shampoo
Ryo is Amorepacific's ginseng scalp line, $20 and 4.1 stars across 975 reviews, sold through Ryo's own storefront. The claims stay where they should: removing itching from dryness and cleansing excess sebum. That is scalp care, it is well made, and it makes no promises about density. Pick it if your scalp runs oily and you want the K-beauty version of a clean starting point.
View on Amazon →The buying guide.
Why the shed lands in autumn
Every hair cycles through growing, transition and rest, and the resting ones are the ones that come out. The Zurich study found the resting proportion peaks in summer across 823 women seen over six years, with the lowest counts in late winter. A resting hair holds for around three months before it releases, which puts the visible shed in September and October for hairs that went into rest in July. Nothing you did in the last month caused it. A heavier shed for six to eight weeks that then settles is the seasonal pattern, and it needs no purchase. Patchy loss, a scalp that hurts or scales, or a shed that follows illness, childbirth, a crash diet or a new prescription is a different problem and belongs with a doctor.
Minoxidil is the whole over-the-counter answer
One molecule regrows hair without a prescription and it has done since the 1980s. Everything else on the shelf either supports it or is a device. Minoxidil comes in a 5% liquid and a 5% foam, the active is identical, and the choice between them is which one you will still be using in March. Two facts govern how you use it. The first: shedding rises for two to eight weeks at the start, because the drug pushes resting hairs out to make room for new ones, then it falls below where it began. The second: it holds ground and never takes it permanently, so if you stop, within a few months you are back where you started plus the time you spent.
What FDA cleared means on a laser cap
The FDA runs a dedicated product code, OAP, for lamps and lasers indicated for hair growth, and 112 devices have been cleared under it, including iRestore, HairMax, Theradome, Capillus and Kiierr. That code is why a $500 cap sits in a different category from a $30 serum, and it is checkable. The clearance is narrow. HairMax prints the indication its own clearance carries: androgenetic alopecia at Norwood-Hamilton IIa to V in men and Ludwig I to II in women, which is early to moderate pattern loss and nothing else. Most caps in the category leave that sentence off the listing. A cleared device also has a lot of company on the shelf: the same product code is full of Chinese contract manufacturers whose clearances sit behind unbranded caps, so a clearance tells you a device passed a bar, and the seller in front of you may not be the company that passed it.
Microneedling, and why nothing here links to one
Rolling fine needles over the scalp alongside minoxidil has published support as an add-on, and it is the one technique here with evidence behind it that we are not sending you to buy. Amazon's scalp roller category is a wall of unbranded devices with no manufacturer on record, and a tool that punctures skin is the wrong place to accept that. If you want to try it, get the device and the technique from a dermatologist who does it.
Reading a shelf that mostly cannot claim anything
Sort any hair product by what its listing is willing to say. Regrow hair is a drug claim and only minoxidil products make it. Cleared to promote hair growth is a device claim with a specific indication behind it. Reduces hair loss due to breakage, improves the appearance of density, supports thicker fuller-looking hair are cosmetic claims, and they describe what a shampoo does: it treats the hair you still have. Biotin is the clearest case. It corrects a deficiency, deficiency is rare, and outside of one there is no case that swallowing more of it grows hair.
FAQ.
Heavier shedding for six to eight weeks in early autumn that then settles matches the seasonal pattern the Zurich trichogram study describes, and it resolves without treatment. Other patterns need a look: hair coming out in defined patches, a scalp that is sore, scaling or inflamed, or a shed that started two to three months after an illness, a fever, childbirth, surgery, a crash diet or a new medication. Those have causes worth identifying, and some of them reverse on their own once the trigger passes. See a doctor before you start a treatment you would need to continue indefinitely.
That is expected. Minoxidil moves resting follicles into a new growth cycle, and the resting hair sitting in each one has to come out first. Shedding rises for two to eight weeks and then drops below where it started. Judge the result at four months. The people who conclude minoxidil made their hair loss worse usually stopped during this stretch.
You lose what it was holding, over a few months, and end up close to where you would have been without it. Minoxidil maintains hair while you apply it and does not permanently change the follicle. That turns a $30 bottle into a recurring cost for as long as you want the result, so plan for it before you start.
They hold a real FDA clearance under a dedicated product code, which is more than most of this aisle can say, and the clearance covers early to moderate pattern loss specifically. Their ratings also spread wide, from iRestore Professional at 4.4 down to HairMax at 3.9 and Theradome at 3.5, against 4.2 for a $30 bottle of minoxidil with thousands more reviews behind it. Add a cap after six months on minoxidil, if at all.
No, and their listings do not claim it. Dr.FORHAIR describes reduced hair loss due to breakage and improvement in the appearance of hair density. Breakage is hair snapping along the shaft, which is a separate problem from hair leaving the follicle. Ryo describes cleansing sebum and relieving itch. Both are well-made shampoos from real manufacturers, Amorepacific in Ryo's case, and both do what a good shampoo does for hair that is already thinning-looking. Neither is a substitute for the one ingredient that regrows.
Buying one thing: Amazon Basic Care Minoxidil 5%, $30.
Buying one you will keep using: Men's Rogaine Foam, $50.
Buying for a woman: Women's Rogaine Foam, $45.
Start by waiting. An autumn shed that follows a heavy summer is the pattern 823 women in Zurich showed across six years, and six to eight weeks later most of it is over. If the density is still going after that, minoxidil is the answer and the only question is format: $30 for the liquid, $50 for the foam that you are more likely to still be using in March. Add the $17 Nizoral if your scalp flakes, because a calm scalp makes it easier to read what the minoxidil is doing. Leave the $899 helmet until you have six months of minoxidil behind you and want the second cleared mechanism on top. The Korean scalp shampoos are good at what their listings claim, which is the hair you still have, and that is worth buying on those terms.