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October 2015 in “Interest : Jurnal Ilmu Kesehatan” In this study, both gel and microemulsion formulas containing waru leaves and Java Tamarind extracts were found to have similar in vivo hair growth activity in rabbits.
This study found that creambath preparations with waru leaf extract accelerated hair growth in New Zealand White rabbits, though none matched the positive control; the 37.5% concentration increased hair weight effectively.
This narrative review examined the potential of hibiscus leaves and apple skin as natural ingredients for hair tonics and reported their effectiveness in addressing hair loss, highlighting properties like strong antioxidant content and ability to strengthen hair roots.
In this experimental study, hibiscus leaf extract at a 30% concentration showed effectiveness in promoting hair growth on guinea pigs, with measurable increases in hair length and weight by the 21st day.
December 2025 in “eTheses of Maulana Malik Ibrahim State Islamic University (Maulana Malik Ibrahim State Islamic University)” In this laboratory study, the researchers reported that an ethnomedicinal hair growth formula from East Nusa Tenggara, incorporating Kemiri, Kembang sepatu, Beringin, Mangkokan, and Waru, demonstrated significant antioxidant activity and effectively stimulated hair growth, suggesting potential development as a natural cosmeceutical.