October 2023 in “Jurnal Ilmu Kefarmasian Indonesia” In this experimental study using rabbits, the researchers evaluated hair tonic formulations containing cinnamon essential oil and virgin coconut oil, finding that formula 3 had hair growth activity exceeding the positive control, though overall growth activity differences were not statistically significant.
May 2023 in “Jurnal farmasi sains dan praktis” In this research on cinnamon and virgin coconut oil hair tonics, F2 and F3 demonstrated stable physical properties and mild irritation potential, while formula 1 remained non-irritating but less stable regarding pH and viscosity.
This study found that applying topical cinnamon essential oil on male wistar rats increased hair length and hair follicle diameter similarly to 2% minoxidil over 30 days.
February 2026 in “ACS Applied Materials & Interfaces” This study developed a novel treatment method using carbon dots from Cinnamomum burmannii leaves, which improved hair regeneration and thickness in an AGA mouse model by promoting cell proliferation, angiogenesis, and reducing inflammation through multiple signaling pathways.
February 2026 in “World Journal of Interdisciplinary Innovation Sciences” This systematic review found that cinnamon supplementation may modestly improve insulin sensitivity and potentially reduce hyperandrogenism in women with PCOS, but stresses the need for large-scale clinical trials.