There are some authentic Hindu scriptures, which say that the portion of the human body from the top of the Head to the Heart are ruled by Vishnu Bhagwan and the functioning of the body parts, which fall within this region are influenced by him. The Tantra also mentions about a Vishnu Gayatri Mantra healing experiment, which can heal any malfunctioning body organ, which falls in this region of the human body, this Mantra experiment is explained in this post.
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