Kérastase Genesis Homme Anti Hair-Fall Fortifying Serum Versus Sephora Collection Strengthening Hair Serum with Biotin and Phytoprotiens
What's inside
What's inside
Key Ingredients
No key ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningAlcohol Denat.
Antimicrobial
Arginine
Masking
PEG-40 Hydrogenated Castor Oil
Emulsifying
Citric Acid
Buffering
Niacinamide
Smoothing
Calcium Pantothenate
Caffeine
Skin Conditioning
Limonene
Perfuming
Pyridoxine Hcl
Skin ConditioningLinalool
Perfuming
Polyquaternium-11
Safflower Glucoside
Benzyl Salicylate
Perfuming
Coumarin
Perfuming
Citral
Perfuming
Benzyl Alcohol
Perfuming
Xylitylglucoside
Humectant
Citronellol
Perfuming
Benzyl Benzoate
Antimicrobial
Anhydroxylitol
Humectant
Xylitol
Humectant
Zingiber Officinale Root Extract
Masking
Resveratrol
Antioxidant
Tocopherol
Antioxidant
BHT
Antioxidant
Sodium Citrate
BufferingWater, Alcohol Denat., Arginine, PEG-40 Hydrogenated Castor Oil, Citric Acid, Niacinamide, Calcium Pantothenate, Caffeine, Limonene, Pyridoxine Hcl, Linalool, Polyquaternium-11, Safflower Glucoside, Benzyl Salicylate, Coumarin, Citral, Benzyl Alcohol, Xylitylglucoside, Citronellol, Benzyl Benzoate, Anhydroxylitol, Xylitol, Zingiber Officinale Root Extract, Resveratrol, Tocopherol, BHT, Sodium Citrate
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Arginine is a semi-essential amino acid. This just means our bodies can product a bit on its own, but sometimes needs a little boost from food sources.
It is a part of your skin's natural moisturizing factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum corneum) that keeps everything hydrated and happy.
Here's an interesting thing about Arginine: your skin converts it into urea through the Krebs-Henseleit urea cycle. Urea is one of the most effective humectants your skin naturally produces.
A clinical study showed applying 2.5% arginine hydrochloride to atopic dermatitis skin showed significant urea levels in the stratum corneum and improved moisture in just four weeks.
Arginine is also a precursor to nitric oxide; nitric oxide improves microcirculation and supports wound healing and collagen synthesis.
One study found that an amino acid complex containing Arginine reduced skin irritation, improved hydration, and accelerated skin repair in clinical / in-vivo studies.
Arginine itself is an amino acid and not a fatty acid, oil, or ester. On its own, it's not a direct food source for Malassezia, or the yeast that causes fungal acne.
Learn more about ArginineCitral is the molecule responsible for the fresh lemon scent in lemon, lime, and lemongrass. It is a fragrance ingredient that can be created from plant essential oils or synthetically.
Though Citral has documented antimicrobial activity against acne bacteria (which is where the marketing claims about it being good for acne-prone skin originate), real formulas use it at fragrance-level concentrations under 1% so there's likely no skin benefit.
You should know this ingredient is a known EU fragrance allergen.
Animal studies classifies this ingredient as a weak-to-moderate skin sensitizer and clinical patch testing on eczema patients confirmed it to be both a contact allergen and irritant.
The term 'citral' is a collective term for two geometric isomers: geranial/Citral A and neral/Citral B.
The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.
Learn more about CitralCitric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes.
Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath.
However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products.
Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH.
In skincare formulas, citric acid can:
While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants.
Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations.
Read more about some other popular AHA's here:
Learn more about Citric AcidLimonene is a fragrance that adds scent and taste to a formulation.
It's found in the peel oil of citrus fruits and other plants such as lavender and eucalyptus. The scent of limonene is generally described as "sweet citrus".
Limonene acts as an antioxidant, meaning it helps neutralize free radicals.
When exposed to air, oxidized limonene may sensitize the skin. Because of this, limonene is often avoided by people with sensitive skin.
The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.
Learn more about LimoneneWater. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!
Learn more about Water
