Kérastase Genesis Anti Hair-Fall Fortifying Serum Versus Neutrogena Hair Restore Advanced Growth Support Serum
What's inside
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningAlcohol Denat.
Antimicrobial
Diaminopyrimidine Oxide
Skin ConditioningAmmonium Polyacryloyldimethyl Taurate
Emulsion StabilisingAminomethyl Propanol
BufferingCitric Acid
Buffering
PEG-40 Hydrogenated Castor Oil
Emulsifying
Piroctone Olamine
Preservative
Caffeine
Skin Conditioning
Arginine
Masking
Limonene
Perfuming
Niacinamide
Smoothing
Pyridoxine Hcl
Skin ConditioningLinalool
Perfuming
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
Sodium Citrate
BufferingParfum
Masking
Water, Alcohol Denat., Diaminopyrimidine Oxide, Ammonium Polyacryloyldimethyl Taurate, Aminomethyl Propanol, Citric Acid, PEG-40 Hydrogenated Castor Oil, Piroctone Olamine, Caffeine, Arginine, Limonene, Niacinamide, Pyridoxine Hcl, Linalool, Safflower Glucoside, Benzyl Salicylate, Coumarin, Citral, Benzyl Alcohol, Xylitylglucoside, Citronellol, Benzyl Benzoate, Anhydroxylitol, Xylitol, Zingiber Officinale Root Extract, Resveratrol, Tocopherol, Sodium Citrate, Parfum
Water
Skin ConditioningPentylene Glycol
Skin Conditioning
PEG-40 Hydrogenated Castor Oil
Emulsifying
Panthenol
Skin Conditioning
Niacinamide
Smoothing
Caffeine
Skin Conditioning
Chrysanthemum Parthenium Flower/Leaf/Stem Juice
Antioxidant
Arginine
Masking
Hydrolyzed Collagen
Emollient
Bisabolol
Antioxidant
Glycerin
Humectant
Mangifera Indica Fruit Extract
Skin ConditioningAcetyl Dipeptide-31 Amide
Skin Conditioning
Isochrysis Galbana Extract
Skin ConditioningCentella Asiatica Leaf Vesicles
Propanediol
Solvent
Hydroxyethylcellulose
Emulsion StabilisingDisodium EDTA
Sodium Benzoate
Masking
Citric Acid
Buffering
Sodium Hydroxide
BufferingWater, Pentylene Glycol, PEG-40 Hydrogenated Castor Oil, Panthenol, Niacinamide, Caffeine, Chrysanthemum Parthenium Flower/Leaf/Stem Juice, Arginine, Hydrolyzed Collagen, Bisabolol, Glycerin, Mangifera Indica Fruit Extract, Acetyl Dipeptide-31 Amide, Isochrysis Galbana Extract, Centella Asiatica Leaf Vesicles, Propanediol, Hydroxyethylcellulose, Disodium EDTA, Sodium Benzoate, Citric Acid, Sodium Hydroxide
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 ArginineCaffeine is a naturally occurring plant compound found in coffee beans, tea leaves, cocoa pods, and guarana.
As an antioxidant, caffeine protects your skin from free radical damage caused by UV exposure and envionrmnetal stressors.
Early research also shows that caffeine can help calm redness, soothe irritated skin, and support hair growth by stimulating microcirculation in the scalp.
You might have seen eye creams marketing caffeine as a depuffing ingredient. This is because it is a vasoconstrictor meaning it can temporarily constrict blood vessels, though clinical evidence for this specific use is still limited.
Most skincare products contain this ingredient at concentrations between 1-6%. It is able to penetrate skin easily regardless of skin type or thickness.
Just so you know, a very small number of case reports describe caffeine-induced allergy. This ingredient is generally well-tolerated, non-irritating, and non-sensitizing for the majority of people.
Learn more about CaffeineCitric 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 AcidNiacinamide is a multitasking form of vitamin B3 that strengthens the skin barrier, reduces pores and dark spots, regulates oil, and improves signs of aging.
And the best part? It's gentle and well-tolerated by most skin types, including sensitive and reactive skin.
You might have heard of "niacin flush", or the reddening of skin that causes itchiness. Niacinamide has not been found to cause this.
In very rare cases, some individuals may not be able to tolerate niacinamide at all or experience an allergic reaction to it.
If you are experiencing flaking, irritation, and dryness with this ingredient, be sure to double check all your products as this ingredient can be found in all categories of skincare.
When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration.
When you apply niacinamide to your skin, your body converts it into nicotinamide adenine dinucleotide (NAD). NAD is an essential coenzyme that is already found in your cells as "fuel" and powers countless biological processes.
In your skin, NAD helps repair cell damage, produce new healthy cells, support collagen production, strengthen the skin barrier, and fight environmental stressors (like UV and pollution).
Our natural NAD levels start to decline with age, leading to slower skin repair, visible aging, and a weaker skin barrier. By providing your skin niacinamide, you're recharging your skin's NAD levels. This leads to stronger, healthier, and younger looking skin.
Another name for vitamin B3 is nicotinamide. This vitamin is water-soluble and our bodies don't store it. We obtain Vitamin B3 from either food or skincare. Meat, fish, wheat, yeast, and leafy greens contain vitamin B3.
The type of niacinamide used in skincare is synthetically created.
Learn more about NiacinamidePEG-40 Hydrogenated Castor Oil is an emulsifier derived from castor oil.
As an emulsifying agent, it helps other ingredients like fragrances and fat-soluble vitamins dissolve cohesively.
Due to its large molecule size, it doesn't penetrate beyond the skin's surface.
This ingredient has a solid regulatory track record; the CIR Expert Panel first concluded it was safe for use in cosmetics at concentrations up to 100% in 1997. A 2012 reassessment reaffirmed that finding. Safety studies have also found no irritation or evidence of toxicity.
A 2019 study did find this ingredient to grow Malassezia, so this ingredient may not be fungal acne safe.
Learn more about PEG-40 Hydrogenated Castor OilWater. 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
