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This review discusses the benefits of using botanicals such as shikakai, amla, reetha, and turmeric in dry shampoos, suggesting these ingredients provide gentle cleansing, nourishment, and protection, aligning with the trend towards natural hair care products.

Biotin and collagen may improve hair health.

Biotin and collagen may help improve hair health.

In this study, Bioactive Collagen Peptides supplementation increased hair follicle cell proliferation and improved hair thickness in healthy women over 16 weeks compared to a placebo.

This study found that both marine and bovine collagen peptides may help prevent hair loss by supporting epithelial hair follicle stem cell functions, with marine peptides maintaining hair in the growth phase and bovine peptides increasing stem cell presence in hair follicle regions.

This study found that AP collagen peptides can promote hair growth by supporting the health of hair follicle cells, as they stimulate cell proliferation, counteract apoptosis, and enhance antioxidant enzyme expression, suggesting potential as a treatment for hair loss.

This study found that marine-derived collagen peptides slightly promoted hair matrix proliferation and prolonged hair growth phase in human hair follicles ex vivo, suggesting potential benefits for hair loss treatment.

In this mouse study, researchers found that orally administered low-molecular-weight fish collagen peptides significantly improved hair regrowth by both enhancing growth-promoting pathways and reducing inhibitory mechanisms.

In this study, Korean adults with damaged hair who took 3g/day of low-molecular-weight collagen peptide GT for 24 weeks showed significant improvements in hair gloss, elasticity, and scalp elasticity compared to placebo, without any adverse events.

This study investigated the effects of a recombinant human collagen complex on hair growth, finding it enhanced survival and function of hair follicle stem cells and promoted hair growth in rat models, suggesting its potential for hair loss prevention and hair health maintenance.

This study developed O/W hair mask emulsions with collagen hydrolysate, keratin, and natural oils, reporting that they are stable, physiologically acceptable for skin, creamy, non-greasy, and hydrophilic, with properties suitable for cosmetic applications in hair care.

This study suggests that bovine and fish-derived collagen peptides may help maintain or prolong the hair growth phase and balance hair follicle stem cell populations, potentially benefiting aging and hair loss conditions like androgenetic alopecia.

In this clinical study, a vegan collagen builder (VEGCOL™️) was shown to safely and effectively improve hair growth, skin smoothness, wrinkle reduction, and joint pain relief in adults, with enhancements varying by dose over a 60-day period.

This study found that recombinant human type XVII collagen (rhCOL17A1) promotes hair growth by activating the Wnt/β-catenin and SHH/GLI signaling pathways and increasing type XVII collagen expression, with significant effects observed in both cell and mouse models.

In this study, adults with mild-to-moderate hair damage taking GPVGPS Collagen® daily for 24 weeks showed significant improvements in hair luster, strength, thickness, and density compared to placebo, with no safety concerns reported.

This study suggests that APC collagen peptides may accelerate hair growth and promote overall hair health by enhancing cellular proliferation and activating specific signaling pathways in human and mouse models.

This study aimed to develop organic oil and shampoo using fish scales and herbs to potentially improve hair strength, growth, and moisture, addressing hair issues like thinning and greying.

In this study, APC collagen peptides were observed to enhance hair elasticity and gloss in human hair follicles by increasing amino acid and lipid component levels, suggesting their potential benefits for improving hair qualities.

This study found that a shampoo containing a 6-active ingredient complex increased β-Catenin production in human hair follicle dermal papilla cells to levels comparable to Finasteride, suggesting potential for promoting hair growth. It also showed good cleaning efficacy, volume, and shine in a sensorial study.

In this study, a 90-day course of a plant-based supplement significantly improved hair density, skin hydration, and nail growth among participants with dermatological concerns, while also reducing hair fall and pigmentation, without adverse effects.

This study found that combined intake of enzyme food and collagen was more effective than either alone in improving scalp hair properties in middle-aged women.

This study found that collagen peptides from Mozambique tilapia significantly promoted hair regrowth and increased the proliferation of hair growth factors in vitro and in vivo, suggesting potential as supplements for hair loss prevention.

In this study, the researchers observed that a recombinant human collagen complex with nicotinamide promoted hair growth in rat models, increased hair follicle stem cell survival, and enhanced key protein expression, suggesting potential benefits for hair health and loss prevention.

This randomized, double-blind, placebo-controlled study found that a supplement containing hydrolysed collagen and vitamin C (Absolute Collagen) improved skin, scalp, and hair over 12 weeks when taken daily or every other day.

This study found that a new hair loss lotion containing various cosmetic ingredients significantly increased total hair fibers and anagen hairs in individuals with androgenetic alopecia and telogen effluvium, while also improving visual hair characteristics and receiving positive user feedback without adverse effects.

This study observed that a cream containing functional compounds from medicinal plants increased collagen production in human skin, while a hair tonic enhanced hair growth in mice.

This review found that hydrolyzed collagen supplementation, particularly marine collagen, improves skin hydration, elasticity, and density while strengthening hair and nails, especially when paired with vitamin C and trace elements; however, more studies are necessary to evaluate long-term efficacy across different sources and demographics.