Red clover and caffeine both promote hair growth, but combining them doesn't enhance the effect.
September 1990 in “Journal of Dermatological Science” June 2023 in “Zenodo (CERN European Organization for Nuclear Research)” 
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.
June 2026 in “Research Square” The combined herbal extracts improved hair regrowth in rats.
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June 2021 in “Journal of Korean Medicine for Obesity Research” Corni Fructus extract may help manage benign prostatic hyperplasia by reducing prostate cell growth and inflammation.
A 15% clove leaf extract shampoo promotes hair growth but is less effective than minoxidil.
March 2026 in “Pharmaceuticals” Xiaoban Kangfu capsules contain compounds that may help with antioxidants, reducing inflammation, and promoting hair growth.
December 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Onion juice is most effective for hair regrowth, while garlic, ginger, and clove help with scalp health.
December 2024 in “Jurnal Insan Farmasi Indonesia” Chloroform extract from onchidiid snail promotes hair growth in rats.