May 2023 in “Pharma xplore : jurnal sains dan ilmu farmasi” In an animal study, researchers found that a hair tonic containing a 1:1 ratio of kelor and rambutan leaf extracts led to similar hair growth in rabbits compared to a minoxidil control, with average hair lengths of 3 cm versus 2.025 cm, respectively.
May 2025 in “International Journal Of Science Technology & Management” This study focused on developing a pomade called "Hyung Hair" made from rambutan leaf extract, which showed potential benefits such as reducing hair loss and slowing gray hair growth, with a feasibility analysis indicating the business's viability.
January 2024 in “Journal of Medicinal Food” This study found that Nephelium lappaceum extract restored hair growth more effectively than finasteride in mice with testosterone-inhibited hair growth, suggesting its potential as a nutraceutical for hair growth.