The active ingredient in hair dye Cassia Obovata is Chrysophanic Acid. In its pure form, chrysophanic acid is yellow, and in high concentrations, it can stain hair with a yellow tone; therefore, it is often referred to as blond henna.[6]

The active ingredient in henna for dyeing hair is lawsone, also known as hennotannic acid. Lawsone binds with the keratin protein found in hair to color and deeply condition it.

Manjistha root contains quinones, glycosides, iridoids, oleananes triterpenoids, bicyclic hexapeptides, and anthraquinones. It is believed to enhance hair color by promoting pigmentation.

Amla is most often used as a color adjuster to tone down the red of henna. Vitamin C in amla powder strengthens, revitalizes, and stimulates healthy hair growth, preventing hair dyeing.

Ecliptin is the active ingredient in hair dye bhringraj leaf. Bhringraj leaves contain Wedelolactone, haritaki, and Jatamansi, which help hair retain its original color.

The active ingredient in hibiscus for dyeing hair is flavonoids and amino acids. These natural ingredients are necessary to produce keratin, giving violet and plum highlights to hair.

Brahmi leaf (Bacopa monnieri) helps to control hair dye by forming a protective layer around the hair fibers, reducing dryness, dandruff, itchiness, split ends and flakes, nourishing the scalp and hair, and calming and soothing an overdried scalp.

Amla is a natural storehouse of Vitamin C and antioxidants, enriched with high levels of Iron content, making it an indispensable component in hair care products. It is also rich in elements like Ellagic Acid[2] phosphorus, and Gallic Acid These work in tandem to improve blood circulation in the scalp area, stimulating hair growth and strengthening hair follicles. It is also a potent inhibitor of the 5-alpha reductase enzyme, which converts testosterone to the androgenic alopecia-causing dihydrotestosterone.[1]

Bhringraj can increase the size and density of hair follicles and encourage strong and healthy hair growth. Additionally, it is an effective remedy to prevent and manage hair loss and premature greying of hair. It is popularly used to enhance strength, softness, luster, and hair growth[4]. Bhringraj contains various biological components, including flavonoids, phytosterols, and coumestans. And Bhringraj is a herb that is rich in vitamins and minerals. It contains vitamins D and E, magnesium, calcium, and iron.

Brahmi is one of the Ayurvedic herbs for hair that supports average hair growth by rejuvenating the scalp. The most active component in Brahmi is the triterpenoids which influence collagen synthesis and hence provide nourishment to malnourished hair follicles and prevent greying. It contains a group of intense compounds called bacosides [7], a kind of triterpenoid saponins that positively affects the body.

Your body needs vitamin C to create a protein known as collagen — an essential part of the hair structure. Vitamin C (ascorbic acid) can act as a mild clarifying agent in shampoo and can be effective in helping remove mineral buildup accumulated on the hair's surface.

In nuts, vegetables, and fruits, ellagic acid was found to obstruct the production of collagen-damaging MMP enzymes and inhibit ICAM, a molecule that plays a part in inflammation.

Gallic acid is a phenolic acid found in fruits, nuts, wine, and tea. It has antioxidants and is antimicrobial.

One study found that l-ascorbic acid 2-phosphate, which contains phosphorus, promotes hair growth by stimulating the secretion of insulin-like growth factor-1 from dermal papilla cells. [3]

Flavonoids are antioxidants that help reduce inflammation, redness, stress, and skin aging.

Vitamin D is responsible for regulating the sebum content in the body.  A deficiency could lead to an imbalance in our scalp oil levels.

Vitamin E may help support a healthy scalp and hair as it has natural antioxidant effects and is a trusted source that could assist with maintaining hair growth. Like vitamin C, vitamin E is an antioxidant that can help prevent oxidative stress.

It helps rejuvenate the scalp and promotes the regeneration of healthy hair. Additionally, bacosides in the plant are anti-inflammatory.