If you're comparing Atmosphere Multi-Peptide Hair Density & Scalp Serum and The Ordinary Multi-Peptide Serum for Hair Density, the ingredient lists tell an interesting story.
Both are leave-in scalp serums designed around peptide technology and ingredients that support the appearance of fuller, denser-looking hair.
But they are not the same formula.
The Ordinary uses a water-based formula with two named peptide technologies, caffeine and a blend of plant extracts. Atmosphere takes a different approach, combining Palmitoyl Tripeptide-5 with caffeine, niacin, adaptogenic botanicals and other scalp-focused ingredients in an aloe-based formula.
So which one is right for you?
Let's compare them ingredient by ingredient.
Quick Comparison
| Atmosphere Multi-Peptide Hair Density & Scalp Serum | The Ordinary Multi-Peptide Serum for Hair Density | |
|---|---|---|
| Formula base | Aloe vera juice-based | Water-based |
| Peptide technology | Palmitoyl Tripeptide-5 | Biotinoyl Tripeptide-1 + Acetyl Tetrapeptide-3 |
| Caffeine | Yes | Yes |
| Niacin | Yes | No |
| Red Clover | Yes | Yes |
| Horsetail | Yes | No |
| Gotu Kola | Yes | No |
| He Shou Wu | Yes | No |
| Skullcap | Yes | No |
| Amaranth | Yes | No |
| Plant extracts | Multiple | Multiple |
| Waterless | No | No |
| Vegan | Yes | The Ordinary states the product is vegan |
| Synthetic fragrance | None | None listed |
The Ordinary's current ingredient list includes Aqua, Propanediol, Butylene Glycol, Glycerin, Caffeine, Biotinoyl Tripeptide-1, Acetyl Tetrapeptide-3 and several botanical extracts, followed by supporting ingredients.
Both Formulas Are Multi-Peptide Scalp Serums
The first thing to clear up is the word "multi-peptide."
Both products use peptide technology, but the peptide profiles are different.
Atmosphere Multi-Peptide Hair Density & Scalp Serum
Atmosphere contains:
Palmitoyl Tripeptide-5
This is the named peptide in the formula.
The rest of the formula is built around botanical extracts, caffeine, niacin and supporting ingredients.
The Ordinary Multi-Peptide Serum for Hair Density
The Ordinary's formula contains two named peptides:
- Biotinoyl Tripeptide-1
- Acetyl Tetrapeptide-3
It also contains caffeine and several plant-derived extracts, including Larix Europaea Wood Extract, Pisum Sativum Extract, Scutellaria Baicalensis Root Extract, Triticum Vulgare Germ Extract, Glycine Soja Germ Extract, Trifolium Pratense Flower Extract and Camellia Sinensis Leaf Extract.
So while both products fall into the multi-peptide scalp-serum category, they use different peptide technologies and different supporting ingredients.
If you want to understand the broader role of peptides in cosmetic hair care, read how peptides are used in haircare.
Atmosphere's Ingredient Approach
Atmosphere uses a combination of peptide technology and botanical ingredients.
Its full formula includes:
- Aloe Barbadensis (Aloe Vera) Juice
- Amaranthus Caudatus (Amaranth) Seed Extract
- Lactobacillus
- Palmitoyl Tripeptide-5
- Trifolium Pratense (Red Clover) Flower Extract
- Butylene Glycol
- Dextran
- Caffeine
- Polygonum Multiflorum (He Shou Wu) Extract
- Niacin
- Glycerin
- Angelica Archangelica (Angelica) Extract
- Equisetum Arvense (Horsetail) Extract
- Centella Asiatica (Gotu Kola) Extract
- Scutellaria Lateriflora (Skullcap) Extract
- Zinc Oxide
- L-Arginine
- Citric Acid
The formula also uses several certified organic ingredients.
Atmosphere does not contain parabens, sulfates, silicones, phthalates, minoxidil, dyes or synthetic fragrances. Luna Nectar products are also vegan and cruelty-free.
The Ordinary's Ingredient Approach
The Ordinary takes a slightly different route.
Its Multi-Peptide Serum for Hair Density combines peptide technologies with caffeine and a group of plant extracts.
Its formula includes:
- Caffeine
- Biotinoyl Tripeptide-1
- Acetyl Tetrapeptide-3
- Larix Europaea Wood Extract
- Pisum Sativum Extract
- Scutellaria Baicalensis Root Extract
- Triticum Vulgare Germ Extract
- Glycine Soja Germ Extract
- Trifolium Pratense Flower Extract
- Camellia Sinensis Leaf Extract
- Apigenin
- Oleanolic Acid
- Arginine
- Zinc Chloride
- Dextran
- Additional supporting ingredients
The Ordinary describes the product as a concentrated leave-in formula containing a combination of peptide technologies and plant-based extracts designed to support the scalp and the appearance of thicker, denser, fuller-looking hair.
Peptide Comparison: What's Actually Different?
This is one of the most useful differences between the formulas.
Atmosphere uses Palmitoyl Tripeptide-5.
The Ordinary uses Biotinoyl Tripeptide-1 and Acetyl Tetrapeptide-3.
These are different peptide technologies, so it's not useful to simply count the number of peptides and declare one formula better.
More peptides does not automatically mean better results.
The entire formulation matters.
That includes:
- Which peptides are used
- What other ingredients accompany them
- The formula base
- How the product feels on the scalp
- How consistently you use it
Caffeine in Both Formulas
Both formulas contain caffeine.
Caffeine is a popular ingredient in scalp-care products because of its interest in hair and scalp research and its use in cosmetic formulations designed around the appearance of hair density.
In Atmosphere, caffeine appears alongside ingredients such as niacin, red clover, horsetail, Gotu Kola, Angelica, skullcap and He Shou Wu, which are ancient herbs used in traditional Chinese medicine for hair growth.
In The Ordinary, caffeine appears alongside its peptide technologies and botanical extracts.
This is a good example of why looking at the entire ingredient list is more useful than focusing on a single "hero" ingredient.
Botanical Ingredients: Where the Formulas Diverge
This is where Atmosphere and The Ordinary become particularly different.
Both use botanicals, but the botanical profiles are not identical.
Atmosphere Includes:
- Red Clover
- He Shou Wu
- Angelica
- Horsetail
- Gotu Kola
- Skullcap
- Amaranth
The Ordinary Includes:
- Larix Europaea Wood Extract
- Pea Extract
- Baikal Skullcap
- Wheat Germ Extract
- Soybean Germ Extract
- Red Clover
- Green Tea
- Apigenin
- Oleanolic Acid
Neither list automatically makes one product superior.
They're simply different formulation philosophies.
If you're looking for a formula that combines peptide technology with a broader adaptogenic and botanical approach, Atmosphere Multi-Peptide Hair Density & Scalp Serum takes that route.
What About Niacin?
Atmosphere also contains niacin.
Niacin is a form of vitamin B3 and is widely used in cosmetic skin and scalp formulations.
It's another point of difference between the two ingredient lists.
The Ordinary's current ingredient list does not include niacin.
Which Formula Is More "Natural"?
This is not a particularly useful way to compare them.
Both formulas contain botanical ingredients, but "natural" does not tell you how a product will perform.
A better way to compare them is to look at:
- Ingredient function
- Formula structure
- Peptide technology
- Botanical profile
- Texture
- Your scalp preferences
- How consistently you can use the product
Which One Should You Choose?
There isn't one universal winner.
Atmosphere Multi-Peptide Hair Density & Scalp Serum May Suit You If You Want:
- Palmitoyl Tripeptide-5
- Caffeine and niacin
- A broad botanical blend
- Adaptogenic ingredients
- Aloe vera as the first ingredient
- A vegan, cruelty-free formula
- No synthetic fragrance
- No minoxidil
- A scalp-care approach that combines peptides and botanicals
What If Your Hair Density Has Changed With Age?
Age can influence hair density, strand diameter and the overall appearance of fullness.
If you're noticing a change in your hair, it can help to understand the different factors that can contribute to lower density. Start with what causes low hair density.
A cosmetic scalp serum can be part of your routine, but it cannot diagnose or treat the underlying cause of hair loss.
If you experience sudden, significant or persistent hair loss, speak with a dermatologist or healthcare professional.
How to Use a Scalp Serum
Both products are designed as leave-in scalp treatments.
The Ordinary recommends applying a few drops to a clean, dry scalp once daily, ideally at bedtime, and leaving the formula in.
For any scalp serum, follow the directions provided by the brand.
Consistency is also important.
Using a product occasionally makes it difficult to evaluate how it fits into your routine. A simple routine you can maintain is more useful than constantly switching products.
For application tips, read how to apply a scalp serum for maximum hair density results.
The Bottom Line
Atmosphere Multi-Peptide Hair Density & Scalp Serum and The Ordinary Multi-Peptide Serum for Hair Density both use peptide technology, caffeine and botanical ingredients, but their formulas are meaningfully different.
Atmosphere contains Palmitoyl Tripeptide-5 alongside caffeine, niacin and a broad botanical blend that includes red clover, He Shou Wu, Angelica, horsetail, Gotu Kola and skullcap.
The Ordinary uses Biotinoyl Tripeptide-1 and Acetyl Tetrapeptide-3 alongside caffeine and a different selection of plant extracts.
The better choice comes down to the formula that aligns with your preferences and the routine you're most likely to maintain.
If you're looking for Atmosphere Multi-Peptide Hair Density & Scalp Serum, explore the full ingredient list including how ingredient likes He Sou Wu helps with hair growth.
FAQs
Is Atmosphere the same as The Ordinary Multi-Peptide Serum for Hair Density?
No. Both are peptide-focused scalp serums, but they use different peptide technologies and supporting ingredients.
How many peptides are in Atmosphere Multi-Peptide Hair Density & Scalp Serum?
Atmosphere contains Palmitoyl Tripeptide-5 as its named peptide.
How many peptides are in The Ordinary Multi-Peptide Serum for Hair Density?
The Ordinary's current ingredient list includes Biotinoyl Tripeptide-1 and Acetyl Tetrapeptide-3.
Can I use both scalp serums?
There's generally no need to use two peptide scalp serums at the same time. Choose one that fits your preferences and use it consistently according to its directions.
Does Atmosphere contain minoxidil?
No. Atmosphere does not contain minoxidil.
Does Atmosphere contain synthetic fragrance?
No. Luna Nectar's ingredient list states that Atmosphere does not contain synthetic fragrance.
