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This study found that a green tea extract gel was stable across various temperatures, did not cause eye irritation, and significantly increased eyelash growth compared to a placebo after two months of use in human volunteers.

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 evaluated a hair tonic formulated from oil palm leaf extract, finding it demonstrated very strong antioxidant activity and could prevent hair decolorization from sun exposure, with effective concentrations ranging from 25 to 200 ppm.

This study found that hair tonics with 5% and 10% licorice extract promoted hair growth in rabbits similarly to 2% minoxidil and were generally safe, although they caused mild eye irritation at the 2.5% concentration.

This study investigated hair growth tonics made with celery leaf extract and found that 4% and 9% concentrations maintained better cyclic stability than 14%, supporting their potential use in herbal cosmetic development due to favorable physicochemical stability.

This study found that a hair tonic containing 40% broccoli stalks extract was more effective in promoting hair growth in male white rats compared to lower concentrations, while also maintaining stable physical characteristics and safety during testing.

This study concluded that a green tea extract hair tonic was stable, promoted more hair growth than 2.5% minoxidil, and did not cause skin irritation.

This study reported that minoxidil lotions produced using a propylene glycol-free base, Aloplus Total, demonstrated high minoxidil solubility and maintained chemical and physical stability for over 180 days, suggesting suitability for enhanced topical treatments of androgenetic alopecia.

This study found that microemulsions containing ethanol extract of cayenne pepper were effective in enhancing hair growth in rabbits, with the 0.2% concentration achieving the most significant results over a 30-day period, compared to a negative control.

In this study, researchers developed a hair tonic using shallots (Allium cepa L.) and found that its F2 formulation was as effective as the positive control in promoting hair growth on the 21st day and remained stable over 28 weeks of testing.

In this study, bleaching and perming were found to significantly reduce opiate concentrations in both spiked and naturally opiate-positive human hair samples.

In this study, a hair tonic containing fragrant pandan leaf extract and virgin coconut oil was formulated and evaluated, with most variations demonstrating physical stability except for one formulation, which showed instability in the specific gravity test.

This study found that a 10% hibiscus leaf extract hair tonic demonstrated better hair growth activity than 2% minoxidil in rabbits but caused eye irritation.

This study found that a formulated polyherbal antidandruff hair oil containing eucalyptus and ocimum volatile oils, along with hibiscus and phyllanthus extracts, showed both antifungal and hair growth activities in open pilot clinical trials.

This study concluded that a liquid serum formulation delivered two fluorescent dyes to deeper follicular regions more effectively than nanoparticle systems.

This study formulated and evaluated a herbal anti-dandruff shampoo using natural ingredients, finding that it effectively reduced dandruff, improved scalp and hair health, and presented an economical and safe alternative to synthetic shampoos without significant skin irritation.

This study evaluated the development of a herbal anti-dandruff shampoo using natural ingredients like fenugreek, curry leaves, and neem, finding it effective in reducing dandruff and nourishing the scalp without causing irritation, and suggesting it as a safe and economical alternative to synthetic shampoos.

In this study, researchers developed a herbal anti-dandruff shampoo utilizing natural extracts like fenugreek, curry leaves, and neem, finding it safe, effective, and stable for topical use, with the curry leaf variety showing superior cleansing performance.

This study reported that a new formulation of finasteride solid lipid nanoparticles, combined with LPC and NTC, enhanced hair growth in mice without visible skin reactions, suggesting it could effectively manage androgenetic alopecia.

This study found that a topical gel containing Minoxidil and Tofacitinib citrate showed promise for treating alopecia areata, with formulation F5 demonstrating effective drug release and stability in evaluations.

This study found that two eco-friendly analytical methods for quantifying Finasteride and Tadalafil in a new dosage form were effective, green, and suitable for quality control.

This review discusses strategies for developing semi-solid topical generic products to match the quality of reference-listed drugs, using concepts like quality by design and reverse-engineering, but reports no new results.

In this study, researchers found that aloe vera hair tonic preparations containing 10% and 15% extract concentrations significantly enhanced hair growth in rats and remained physically stable across various temperature conditions.

This study introduced an innovative antioxidant serum for skin care, using a lipid active from Rana catesbeiana Shaw, and validated its rejuvenating potential through physical-chemical and microbiological tests that ensured its antioxidant effectiveness, microbiological safety, and formulation stability.

In this study, a hair tonic formulated from a 10% water fraction of Angiopteris evecta extract was reported to be stable and promote hair growth in rabbits, showing equal or greater efficacy compared to a synthetic minoxidil control, while being safe and non-irritating.

This study introduces three spectrophotometric techniques for accurately determining finasteride and tadalafil in their combined pharmaceutical form, demonstrating their sustainability, sensitivity, and suitability for quality assurance, alongside a dissolution study following FDA guidelines.

This study formulated and evaluated the physical stability of hair tonic preparations using lime extract (Citrus aurantifolia) at varying concentrations. The researchers found that the tonics exhibited good physical stability, as indicated by meeting Indonesian National Standards, even after undergoing temperature cycling tests.

In this experimental study, the researchers developed and evaluated a hair tonic made from mangosteen peel extract, finding that all four tested formulations showed suitable physical characteristics and met standard requirements for attributes like pH, viscosity, and stability.

This study established a stable formulation for caffeine nanocrystals in specific solvent mixtures, which could be used to test their potential for enhanced hair follicle targeting and penetration.

This review article describes the ingredients and evaluation tests for formulating a hair serum aimed at improving hair growth and preventing hair loss, highlighting the roles of Citrus sinensis, Nigella sativa, flax seed, and coconut oil in addressing hair and scalp health.