October 2022 in “Research Square (Research Square)” The conclusion is that certain chemicals from Bacillus subtilis help improve plant root growth through a hormone-related process.
March 2016 in “European Urology Supplements” Methylation in specific gene region causes finasteride resistance in some BPH patients.
January 2002 in “Academic Journal of Kunming Medical College” Human-hair keratin artificial tendons are biocompatible and degrade well in rabbits.
November 2025 in “Journal of Investigative Dermatology” 
5 citations
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May 1983 in “Australian journal of biological sciences” Certain amino acid analogues can inhibit wool and hair growth and affect fiber strength.
2 citations
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January 2004 in “Sen i Gakkaishi” Human hair and nail proteins are unlikely to cause allergic reactions.
January 2025 in “The International Journal of Gastroenterology and Hepatology Diseases” Vitamin B12 is crucial for hair and nerve health, and its malabsorption can cause hair loss and nerve damage.
7 citations
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July 2008 in “Experimental Dermatology” The study concluded that a protein important for hair strength is regulated by certain molecular processes and is affected by growth phases.
13 citations
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September 2007 in “Journal of dermatological science” August 2025 in “South African Journal of Botany” Formulation B of the herbal hair oil promotes hair growth better than standard treatments and is safe for use.