Ranjaka (Sanskrit: रञ्जक) is a Sanskrit term in Ayurveda

Ranjaka (Sanskrit: रञ्जक) is a Sanskrit term in Ayurveda that refers to the "coloring" or "tanning" property of certain substances, particularly in relation to the blood tissue (Rakta dhatu).

Ranjaka is one of the five subcategories of the Pitta dosha (fire and water elements) and is responsible for:

- Coloring the blood and skin

- Influencing the body's natural pigmentation

- Affecting the appearance of the skin and complexion

Substances with a Ranjaka property can:

- Enhance or alter skin color

- Influence hair color and texture

- Affect the appearance of the eyes and nails

Ayurvedic practitioners use Ranjaka substances to:

- Treat skin conditions like vitiligo or leucoderma

- Enhance skin complexion and beauty

- Support hair growth and color

- Promote overall health and well-being

Examples of Ranjaka substances include:

- Turmeric (Curcuma longa)

- Manjishtha (Rubia cordifolia)

- Guduchi (Tinospora cordifolia)

- Haridra (Curcuma longa)

Note: Ranjaka is an important concept in Ayurvedic pharmacology and is used to understand the properties and effects of various substances on the body.