January 2024 in “International journal of molecular sciences” A brain-made hormone can protect against memory-related brain damage caused by harmful proteins.
9 citations
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August 2007 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” Sheep wool follicles absorb different amino acids at various rates and locations, which could affect wool growth based on diet and genetics.
September 2019 in “Journal of Investigative Dermatology” People with pattern hair loss have higher polyamine levels in the top of their head compared to the back.
8 citations
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January 2016 in “Cells tissues organs” Norepinephrine helps skin cells grow, which is important for hair growth.
5 citations
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January 2011 in “International Journal of Cosmetic Science” 1,2,3,4-tetrahydroquinoline compounds are great for stable, pure blue hair dye.
August 2023 in “Fermentation” Scientists can use engineered microbes to make L-aspartate and related chemicals, but there's still room to improve their efficiency.
1 citations
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May 2025 in “Journal of the Indian Chemical Society” 24 citations
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April 2016 in “Experimental Dermatology” Chemical treatments like dyeing, perming, and bleaching damage hair by altering amino acids and lipids.
38 citations
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April 2020 in “IntechOpen eBooks” Phenylalanine may help with depression but can cause issues if not properly processed.
September 2025 in “Journal Of Community Service for Economics and Business” Niosomes improve aminexil's effectiveness in preventing hair loss without needing propylene glycol.
September 2002 in “Research Repository (Kingston University London)” Mimicking the steroid A-ring may help create effective enzyme inhibitors for prostate disease treatment.
18 citations
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October 2022 in “JCI Insight” Abnormal amino acid metabolism may worsen rosacea symptoms.
125 citations
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February 1971 in “Biochemistry” Specific cross-linkages help make hair proteins stable and strong.
31 citations
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January 2003 in “Dermatology” Steroidogenic isoenzymes may help improve treatments for common hair loss.
June 2025 in “Mağallaẗ ʻulūm al-rāfidayn” New pyrazole derivatives may help treat hair loss, but more testing is needed.
12 citations
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July 2021 in “Scientific Reports” Glutamic acid helps increase hair growth in mice.
35 citations
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July 2022 in “Frontiers in Integrative Neuroscience” Formononetin may help protect the brain and treat neurological diseases.
3 citations
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February 2025 in “Metabolites” The research found enzymes in Stephania epigaea that help make cepharanthine.
2 citations
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October 1999 in “Annals of the New York Academy of Sciences” Melatonin and cortisol affect mink winter hair growth, but β-endorphin levels do not.
Finasteride may cause changes in dopamine-related genes, possibly leading to post-finasteride syndrome.
66 citations
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August 2007 in “Applied and environmental microbiology” The engineered yeast strain BLYAS can quickly and sensitively detect androgenic chemicals.
May 2022 in “Endocrine Abstracts” Finasteride may cause sexual dysfunction by reducing epinephrine levels.
March 2018 in “International Pharmacy Acta” New niosomal formulation effectively delivers aminexil through rat skin.
7 citations
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January 1982 in “Acta agriculturae Scandinavica” Mink use L-methionine and L-cystine slightly better than natural amino acids for hair growth, but D-methionine is not effective.
54 citations
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May 2001 in “Journal of Investigative Dermatology” Excessive putrescine causes hair loss in transgenic mice by disrupting hair follicle development.
November 2025 in “Journal of Investigative Dermatology” AMP-303 injections can increase hair growth in androgenetic alopecia with minimal side effects.
31 citations
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November 2014 in “Investigative Ophthalmology & Visual Science” A natural steroid in the body may protect against eye damage in glaucoma.
82 citations
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January 1997 in “Forensic science international” Drugs can be incorporated into hair based on their chemical properties and hair pigmentation.
May 2024 in “Brain disorders” Agmatine may help reduce seizures linked to hormone changes in female rats.