Sulfur is present in abundance in the keratinized cells of hair. Chemically, sulfur has the ability to form strong bonds that contribute to the strength of healthy hair Methylsulfonylmethane (MSM) is a natural and highly absorbable source of sulfur necessary for the formation of keratin in nails, skin, and hair. "All about pdf - Huntington College of Health Sciences.", Shapiro J, Price VM. Hair regrowth: Therapeutic agents. Derm Clin 1988;16:341–356
Amla (Phyllanthus emblic)
Emblica (Phyllanthus emblica L.), an euphorbiaceous plant, is widely distributed in subtropical and tropical areas of India, China and Indonesia. The fruits possess antimicrobial, antioxidant, anti-inflammatory, analgesic and antipyretic properties. "Determination of gallic acid in Phyllanthus emblica Linn. dried fruit powder by HPTLC” - NCBI - NIH." , J Pharm Bioallied Sci. 2010 Apr-Jun; 2(2): 105–108.
Traditionally, the fruit is useful as an astringent, cardiac tonic, diuretic, laxative, livertonic, refrigerant, stomachic, restorative, alterative, antipyretic, anti-inflammatory, hair tonic, and digestive medicine. "Determination of gallic acid in Phyllanthus emblica Linn. dried fruit powder by HPTLC” - NCBI - NIH." J Pharm Bioallied Sci. 2010 Apr-Jun; 2(2): 105–108.
In traditional medicine, amla plant, its fruit, or its various constituents have been extensively used in different herbal formulations of Unani, Chinese, and Sidha systems of medicine to treat a variety of maladies. It favours longevity, improves digestion, reduces hyperthermia, normalizes blood parameters, alleviates asthmatic conditions, stimulates growth of hair, and strengthens heart and liver. "Studies on Emblica officinalis ...” ScientificWorldJournal. 2014; 2014: 378473.
Gotu Kola (Centella asiatica)
TECA treatment increased the expression of the hair growth-related signature genes in 3D sphered HDP cells. Furthermore, TECA led to downregulation of the level of phosphorylated STAT proteins in 3D sphered HDP cells. Overall, TECA activates the potential of hair inductive capacity in HDP cells "Titrated extract of Centella asiatica increases hair inductive property through inhibition of STAT signaling pathway in three-dimensional spheroid cultured human dermal papilla cells. ... - NCBI." 16 Oct. 2017, https://www.ncbi.nlm.nih.gov/pubmed/29032741.
Reported to be useful for hair loss by various investigators: Centella asiatica "herbal treatment for hair loss" International Journal of Pharmacy and Technology, Vishal Junnar Seva Mandal Institute of Pharmacy, A/P Ale, Tal-Junnar, Dis-Pune-41241, 23-10-2010
Silica (Silicon dioxide (SiO2))
Regarding hair benefits, it was suggested that a higher silicon content in the hair results in a lower rate of hair loss and increased brightness. For these beneficial effects, there is growing interest in scientific studies evaluating the efficacy and safety of using dietary supplements containing silicon. Its use aims at increasing blood levels of this element and improving the skin and its annexes appearance ... The analysis of the scientific literature on the use of supplements containing silicon shows great therapeutic potential of this element, as it operates in different conditions of human health and presents aesthetic properties. "Use of silicon for skin and hair care: an approach of ... - NCBI - NIH." An Bras Dermatol. 2016 May-Jun; 91(3): 331–335.