Best Peptide Hair Growth Serums by Bottle and Base

The best peptide hair growth serum for oily hair is The Ordinary Multi-Peptide Serum for Hair Density, because its 2.02 Fl Oz bottle is both alcohol-free and silicone-free, which is the combination that matters most when your scalp already produces plenty of its own oil. If you want a click-pen applicator instead of a dropper, the OGX ProGrowth + Peptide Scalp Serum is the better buy at 1.76 oz. Get this wrong and you spend two months rubbing a heavy, silicone-laden liquid into a scalp that needed washing anyway. Then you blame the peptides.

Best peptide hair growth serum for oily hair at a glance

How I screened these peptide serums

I weighted three criteria, in this order.

1. What the formula base says about residue. A scalp serum sits on skin for hours. Alcohol-free and silicone-free matter more here than the peptide list does, because a silicone film is what you feel by lunchtime.
2. Published bottle volume. This decides cost per month more than anything else, and it is one of the few figures every listing gives you in a comparable unit.
3. How many specifications the listing publishes at all. A serum with a stated colour, weight, dimensions and model number is a listing someone maintained.

Why that order? Because peptide ingredient lists across this set are near-identical in spirit. Four of the five name caffeine. Three name copper peptides directly. Two name niacinamide. Once you accept that, the base and the bottle are what separate them.

Cuts came fast. Anything without a stated bottle size in fluid ounces or a stated weight was out, which is why every pick here publishes at least one. Anything sold in a multipack was out, since a first purchase should be one bottle. The five that survived range from 1 Fl Oz to 2.02 Fl Oz, and they sit across three price positions.

Does a peptide hair growth serum work on an oily scalp?

Here's the honest answer: no listing in this set is formulated or marketed specifically for oily hair, so nobody here can promise you it solves grease. Amazon's search returned peptide serums, not oil-control products. That distinction matters.

What you can judge from the data is what the serum adds to an already oily scalp. That is the real deciding criterion in this category, and it is not the peptide count.

Three things to check on any label:

• Alcohol content. The Ordinary states its formula is alcohol-free. OGX states the same. Neither is drying your scalp into rebound oil production.
• Silicones. Only The Ordinary states silicone-free among these five. Silicone is what leaves a coated, second-day feel on fine hair.
• Base. Fléur describes a water-based, residue-free formula. Sahha describes a non-greasy leave-in. Both are manufacturer claims, and both are the right kind of claim for this problem.

Most guides to the best peptide hair growth serum for oily hair skip straight to the ingredient deck. The deck barely varies. The base varies a lot.

1. The Ordinary Multi-Peptide Serum for Hair Density — Best overall

The only pick here that publishes both alcohol-free and silicone-free, in the largest bottle in the set.

Best for: daily bedtime use on a scalp that gets greasy fast Skip it if: you want a click-pen applicator you can use mid-day

Start with the number that decides your monthly cost. At 2.02 Fl Oz, this is the biggest bottle in the group, twice the volume of the Fléur and THORN & BERRY picks. It weighs 3.17 oz filled and measures 5.14 x 1.53 x 1.53 in, so it stands in a cabinet rather than rolling around a drawer.

The formula claims matter more than the size here. The Ordinary lists this as alcohol-free, silicone-free, vegan, gluten-free and cruelty-free. Silicone-free is the rare one. If your hair goes limp a day after washing, a silicone-carrying scalp serum makes that worse, and this is the only pick in the set that states it leaves silicone out.

The brand names its peptide stack directly: REDENSYL, Procapil, CAPIXYL, BAICAPIL, AnaGain and high-solubility caffeine, plus larch wood, pea and green tea leaf extracts. Those are the manufacturer's claims about what the actives do, not measured outcomes. Application guidance is a few drops on a clean, dry scalp once a day, ideally at bedtime, which suits an oily scalp routine because you wash in the morning anyway.

The trade-off: a dropper is slower and messier than the OGX click pen, and this is the mid-priced pick rather than the cheapest.

Pros:

• Largest published volume in the set at 2.02 Fl Oz
• Only pick stating a silicone-free formula
• Alcohol-free, vegan and cruelty-free claims
• Six named peptide technologies plus caffeine
• Most complete spec sheet of the five

Cons:

• Dropper application is slower than a click pen
• Not the cheapest option here
• Bedtime-only guidance limits routine flexibility
• Nothing in the listing addresses oil control directly

2. OGX ProGrowth + Peptide Scalp Serum — Best for families

A click-pen applicator and a damp-or-dry hair instruction make this the easiest peptide hair growth serum to share.

Best for: a shared bathroom and a serum you can use on damp hair Skip it if: you want the largest bottle for the money

The applicator is the story. This is a click pen, not a dropper, which means nobody has to squeeze a pipette over a sink and guess. OGX directs 3 to 6 drops onto what it calls the "Scalp T-Zone", meaning temples, part and front hairline, on clean damp or dry hair between washes. That last clause is useful on an oily scalp: you are not locked into a single moment in your week.

It is the second-cheapest pick here and it sits in the entry price tier alongside THORN & BERRY. The listing gives a filled weight of 1.76 oz, an off-white colour, a model number and a 2025 release date, which is the newest product in the set. OGX describes a "Long7vity Complex" of peptide, caffeine and micro-algae, with niacinamide, feverfew, vitamin B5 and mango extract for the scalp. It also claims a formula without fragrance, parabens, sulfated surfactants or alcohol.

The catch is volume. The published size is 0.33 fl oz in the full product title, far smaller than the 2 Fl Oz bottles here, so drops-per-bottle is the lowest in the group.

Pros:

• Click-pen applicator, no dropper needed
• Usable on damp or dry hair between washes
• Second-cheapest pick in this set
• Fragrance-free, paraben-free, alcohol-free claims
• Newest product here, released 2025

Cons:

• Smallest published volume of the five
• No silicone-free statement on the listing
• No published bottle dimensions
• Targeted only at the front and part, not the whole scalp

3. Sahha GHK-Cu Peptide Hair Growth Serum — Best for heavy use

A 2 Fl Oz bottle with a stated 7200MG copper peptide complex, built for treating several thinning zones daily.

Best for: treating hairline, crown and part line every single day Skip it if: you would rather not pay premium prices for a copper formula

Sahha publishes the highest active figure in the set: a 7200MG liposomal GHK-Cu complex. That is the brand's number, printed on the listing, and it is worth reading as a concentration claim rather than a proven dose. What it does tell you is that copper peptides are the headline here, not a supporting note.

The 2 Fl Oz bottle, which Sahha also states as 60ml, is the second-largest volume in this group and the brand explicitly frames it as a long-lasting size at a few drops per application. Weight is listed at 2 oz, colour is blue. Beyond copper peptides, the formula adds caffeine, biotin, panthenol and niacinamide, and Sahha describes a liposomal delivery system that encapsulates ingredients in phospholipid layers. The brand calls the result fast-absorbing and non-greasy, which is the relevant claim for anyone with an oily scalp, and it names hairline, crown and part line as target areas.

It sits in the premium tier and it is the slowest seller of the five. The trade-off against The Ordinary is straightforward: comparable volume, higher price position, no silicone-free statement, and fewer published specifications overall.

Pros:

• Highest stated active concentration at 7200MG
• Second-largest bottle in the set at 2 Fl Oz
• Non-greasy, fast-absorbing formula claim
• Named for hairline, crown and part line coverage

Cons:

• Premium price position for a copper-led formula
• Slowest seller among these five picks
• No published dimensions or model number
• No silicone-free or fragrance-free statement

4. Fléur Bloom Clinically Proven Copper GHK-CU Peptide Hair — Best premium

A water-based, fragrance-free formula in the most compact bottle here, at the top price position.

Best for: a fragrance-free, water-based formula in a compact bottle Skip it if: you need volume, since it is the smallest bottle here

This is the most expensive pick in the set and the case for it rests on the base, not the bottle. Fléur describes a water-based, residue-free serum that absorbs without greasiness, and names sensitive scalps directly. For an oily scalp, water-based is the right architecture: nothing added to a surface that already has plenty.

The bottle is 1 Fl Oz, amber, measuring 3.85 x 1.24 x 1.73 in. That compact footprint travels well, and amber glass shields light-sensitive actives. Fléur claims GHK-Cu plus five advanced peptides, and describes the formula as paraben-free and fragrance-free. Fragrance-free is worth something if you apply a serum to your scalp nightly and then sleep on it.

The word "clinically proven" appears in the product name. That is Fléur's own wording, and the listing supplies no study details, so treat it as branding rather than evidence you can inspect.

Against The Ordinary, the maths is unkind. You pay the highest price in this group for roughly half the volume and no silicone-free statement. The precision dropper is a nice touch, and the compact size suits a travel bag, but the value argument belongs elsewhere.

Pros:

• Water-based, residue-free formula claim
• Fragrance-free and paraben-free
• Smallest footprint at 3.85 x 1.24 x 1.73 in
• Amber bottle shields light-sensitive actives
• Precision dropper for targeted application

Cons:

• Highest price position for the least volume
• 1 Fl Oz means the fewest applications per bottle
• "Clinically proven" claim comes with no published detail
• No stated weight on the listing

5. THORN & BERRY Hair Growth Serum for Thinning Hair — Best budget pick

The cheapest way into peptides here, with the thinnest published spec sheet of the five.

Best for: trying peptides for the first time without much outlay Skip it if: you want published specs beyond size and count

If you have never used a scalp serum and you are not sure you will stick with it, this is the low-commitment entry. It is the cheapest of the five and the bottle is 1 Fl Oz.

The ingredient story is dense on paper. THORN & BERRY names a peptide and niacinamide complex built on copper tripeptide-1 and acetyl tetrapeptide-3, then adds biotin, caffeine, hydrolyzed keratin, amino acids, zinc, vitamin E, hyaluronic acid, arginine and REDENSYL. It also describes a botanical DHT blocker blend. That is a long list of manufacturer claims, and the listing offers no way to check proportions.

Here's the problem. The published specifications stop at size and count. No weight, no dimensions, no colour, no model number. Compare that with The Ordinary's six-field spec sheet and you can see the difference in how carefully each listing is maintained. It is also the slowest seller of these five.

For a first bottle, that gap may not bother you. For a serum you plan to reorder for six months, the missing detail is a reason to spend up.

Pros:

• Cheapest pick in this comparison
• Copper tripeptide-1 and acetyl tetrapeptide-3 named
• Adds keratin, zinc and hyaluronic acid claims
• Low-risk way to trial a peptide routine

Cons:

• Only two published specifications: size and count
• No stated colour, weight or dimensions
• 1 Fl Oz ties for smallest fluid volume here
• Long ingredient list with no proportions given

How long does one bottle actually last?

Nobody publishes a day count, so work it from the drops. OGX gives the clearest instruction in the set: 3 to 6 drops once daily. The Ordinary says a few drops once daily. Sahha says a few drops per application. Fléur says daily with the dropper.

Assume a similar dose across all four and volume becomes your only lever. That splits this field cleanly:

• 2.02 Fl Oz: The Ordinary. The largest bottle here.
• 2 Fl Oz: Sahha, stated as 60ml.
• 1 Fl Oz: Fléur and THORN & BERRY. Roughly half the runway of the two above.
• 0.33 fl oz per the title, 1.76 oz filled weight: OGX. Smallest by volume, and designed for a narrow application zone rather than the whole scalp.

The practical read: a 2 Fl Oz bottle covers roughly twice the stretch of a 1 Fl Oz bottle at the same dose. That is why the mid-priced Ordinary beats the premium Fléur on cost per week even before you compare formulas.

What the listings do not tell you

Three gaps run across every pick.

No warranty or guarantee is published for any of the five. Not one listing in this set states a return window or satisfaction guarantee. Check the seller page before you commit, because two sellers list each of these products.

No timeline you can verify. OGX claims visibly thicker hair in 30 days and cites an 81% agreement figure, both marked with asterisks pointing to study details the listing does not show you. Every other pick describes "consistent use" without a number. Treat all of these as marketing timelines.

No oil-control claim anywhere. Non-greasy, residue-free and water-based are formula descriptions, not sebum management. If your main problem is a scalp that gets greasy within a day, a peptide serum is not the product that fixes it. It just needs to avoid making it worse.

One more thing worth knowing: three of these five are shelved under Hair Loss Products rather than general hair care, and only the OGX sits in Hair Care > Scalp Treatments. That tells you something about how each brand positions itself.

When a different peptide hair growth serum wins

The winner is the default, not the answer for everyone. Four flips, each with a threshold you can check:

• You need to apply between washes. OGX is the only pick that states damp-or-dry use with a click pen. If your routine involves a mid-week top-up, the applicator decides it.
• You are treating more than one zone. Sahha names hairline, crown and part line and gives you 2 Fl Oz to cover them. If you are working three areas rather than a receding part, the volume plus the 7200MG copper figure earns the premium.
• Fragrance is a hard no. Fléur and OGX both state fragrance-free. The Ordinary does not make that claim, so if scent triggers irritation for you, switch.
• Your budget for a trial is minimal. THORN & BERRY is the cheapest here. Spend little, learn whether you keep the habit, then upgrade.

Outside those four cases, the best peptide hair growth serum for oily hair remains the one with the largest bottle and the silicone-free statement.

The verdict

If you have an oily scalp and you want a serum you can apply at night and wash out in the morning, buy The Ordinary Multi-Peptide Serum for Hair Density. Its 2.02 Fl Oz bottle is the largest here, it is the only pick stating both alcohol-free and silicone-free, and it publishes more specifications than anything else in the set. That combination is what a greasy scalp needs: nothing film-forming, nothing drying, and enough volume to run the routine long enough to judge it.

If you need to apply between washes rather than only after them, buy the OGX ProGrowth + Peptide Scalp Serum. The click pen is the real advantage. You can use it on damp or dry hair, target the temples and part in seconds, and it is the second-cheapest pick here. What you give up is volume, because it holds the least of the five.

The cutoff is your washing schedule. Wash daily or near-daily and the dropper is fine, so take the bigger bottle. Wash twice a week and need something usable in between, take the pen. Sahha wins only if you are treating three separate zones and want the highest stated copper figure. Fléur wins only if fragrance-free in a compact bottle outranks everything else.

FAQ

Is a peptide hair growth serum worth the money?

A peptide hair growth serum is worth the money only if you commit to daily use for months, because every brand here describes results from "consistent use" rather than a single bottle. The Ordinary makes the case easiest at 2.02 Fl Oz, since a larger bottle lowers your cost per week and removes the temptation to skip days to stretch it.

Which peptide serum gives the best value per bottle?

The best value per bottle goes to The Ordinary at 2.02 Fl Oz, the largest volume in this comparison, sitting in the middle price tier. THORN & BERRY is cheaper outright but holds 1 Fl Oz, and Fléur costs the most for the same 1 Fl Oz. Volume divided by price position is what settles this, not the ingredient list.

Will a peptide hair growth serum make oily hair greasier?

Whether a peptide hair growth serum makes oily hair greasier depends on the base, not the peptides. Silicones and heavy carriers leave a film that reads as grease by afternoon. The Ordinary states a silicone-free, alcohol-free formula. Fléur describes a water-based, residue-free base and Sahha claims non-greasy absorption. Those are the labels to hunt for.

The Ordinary or OGX: which peptide serum should I choose?

Choose between The Ordinary and OGX on applicator and volume. The Ordinary gives you 2.02 Fl Oz, a dropper and a bedtime-only instruction, plus a silicone-free claim. OGX gives you a click pen, permission to apply on damp or dry hair between washes, and a 2025 release date, in a much smaller size. Routine flexibility versus runway.

What mistake do people make buying scalp serums?

The mistake people make buying scalp serums is chasing the longest ingredient list. THORN & BERRY names ten-plus actives and publishes only two specifications. The Ordinary names six peptide technologies and publishes size, colour, count, weight, dimensions and a model number. A maintained listing tells you more about what you are buying than a crowded ingredient deck does.

Pick your bottle based on how often you wash, then give it the months every one of these brands says it needs. Start with The Ordinary if your scalp gets greasy fast and you want a nightly routine you can actually keep, since 2.02 Fl Oz buys you the runway to find out whether peptides do anything for your part line. Order one bottle, not three. Apply the same few drops to the same spots at the same time each night, take a photo of your part in the same light every fortnight, and let the pictures settle the argument.

Last updated: September 11, 2026. Product availability re-checked.

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