Sinu Joseph is a menstrual educator, an author and one of the pioneers of the menstrual health movement in India. Her work on menstruation has been unique in its efforts of unearthing the ancient science behind native menstrual practices and bringing forth a narrative which is the Bharatiya perspective on menstruation. She is the co-founder and Managing Trustee of Mythri Speaks, and also works with The Forward Foundation. She has studied several Hindu temples, religious restrictions owing to menstruation and their impact on women’s menstrual health. Her study on Sabarimala and the associated Sastha temples explore the way consecrated spaces can alter women’s menstrual cycles. Her book ‘Woman & Sabarimala: The science behind restrictions” is written from a woman’s perspective, explaining the nature of the temple through India’s traditional knowledge systems, such as Tantra and Agama Shastra. She is also author of 'Ṛtu Viḍyā: Ancient Science behind Menstrual Practices'.