Herbal and botanical proprietary blends are commonly marketed in supplements aimed at supporting hair health. The evidence for these blends primarily comes from traditional and historical use in various cultures, rather than robust scientific validation. Herbs such as saw palmetto, horsetail, nettle, and others have been historically used in folk medicine for their presumed positive effects on hair growth, scalp health, and reducing hair loss. For example, Ayurvedic and Traditional Chinese Medicine often include botanicals like bhringraj, amla, and fenugreek in hair tonics and oils, attributed to their supposed nourishing and strengthening properties.

However, scientific studies on these blends are often limited, of low quality, or focus on individual herbs rather than the proprietary blend as a whole. Some small studies suggest possible mechanisms—such as anti-inflammatory, antioxidant, or hormone-modulating effects—that could theoretically support hair health, but robust clinical trials confirming efficacy are generally lacking. Therefore, while there is a longstanding tradition of using herbal blends to support hair, and some preliminary data on specific botanicals, the overall evidence base remains weak. Most claims rely on traditional use, anecdotal reports, and marketing rather than rigorous science.