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Amino Acids
As a comprehensive manufacturer of amino acids, Ajinomoto Co. not only conducts a multifaceted range of original scientific research into amino acids, we also provide the world with a remarkable variety of amino acids for foods, medicines, feeds, and cosmetics. In every area of our business, the AJINOMOTO® brand is one you can trust for the highest standards of quality and reliability.
Skin and Amino AcidsStructure of Skin
Composition of NMF
| Amino Acids |
42% |
| PCA |
12% |
| Lactic Acid |
11% |
| Urea |
7% |
| Others |
28% | |
Composition of NMF
*H.W.Spier, G.Pascher Der Hautarzt,
Vol. 7, 55-60 (1956) |
Amino Acid Composition of NMF
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| *H. W. Spier, G. Pascher Der Hautarzt, Vol.7, 55-60 (1956) |
Amino Acid Composition of Human Skin Collagen
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| *J. E. Eastoe in Treatise on cillagen Ch.1 p52-53 |
Hair and Amino Acids
- Amino Acids as Components of HairKeratin proteins derived from amino acids account for about 80% of the components which constitute human hair. Other components include water, lipids, and melanin.
- The Scalp and Amino AcidsSince the scalp is skin, amino acids are essential to keep it well-nourished and ready to promote healthy hair growth.
- Hair Growth Efficacy and Amino AcidsAmino acids such as L-cysteine, L-methionine and L-serine are known to promote hair growth.
Amino Acid Composition of Hair
Cosmetics and Amino Acids
| Usage Category |
Function |
Amino Acids |
| Cosmetics |
Moisturization
Neutralization
pH buffering
Mitigation of irritation potential |
Proline, Other Amino Acids
Base: Arginine Acid: Glutamic Acid, Aspartic Acid
Sodium Glutamate, Glycine, Aspartic Acid, etc.
Arginine |
| Permanent wave |
Relaxing |
Cysteine |
| Hair conditioner |
Conditioning |
Arginine, Asparatic acid, Glutamic Acid, Glycine, Proline, Sodium Glutamate |
| Hair nourishment |
Hair nourishment*
Damage recovery |
Methionine, Serine
Alanine, Histidine, Glysine, Phenylalanine |
| Hair color |
Improve dyeing performance and color retention for a temporary dye
Prevent color fade oxidative dye |
Arginine Glu Asp, Glysine, Sodium Glutamate
Arginine | |
| *Nogei Kagaku [Agricultural Chemistry], Vol.48, No.5 (1974) |
Basic and Acidic Amino AcidsL-arginine is a typical basic amino acid with a cellular activatory effect. L-arginine is also widely used as a mild, natural neutralizer. L-glutamic acid, on the other hand, is a typical acidic amino acid, widely used as a mild neutralizer or a pH adjuster.
L-Arginine
L-Glutamic Acid 
Neutral Amino AcidsGlycine accounts for about one third of the amino acids which make up human skin collagen. Glycine is also well suited to hair care products since it works to make hair smoother when “finger-combed” as well as in general enhancement of hair aesthetics.
L-serine, which accounts for about 30% of the amino acids contained in NMF, promotes the formation of the horny layer of the skin.
L-proline stands out among amino acids for its moisturizing efficacy. Together with L-serine and PCA, L-proline is widely used as a moisturizer in skincare products.
Glycine
L-Proline
L-Serine
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