Medical knowledge in Vedas:

It is well-known that the medicine in the Atharvaveda is predominantly a pre-scientific medicine and is considered to be the forerunner of the Indian system of scientific medicine, known as the Āyurveda ‘science of longevity’. Scholars have attempted to find roots of the Āyurveda in the medical charms of the Atharvaveda and the remedies against various diseases prescribed in the ritual texts in the tradition of that Veda.

The atharvaveda gave birth to Ayur Veda, the traditional system of Hindu medicine and it was developed around 5000 years ago.

The west is fond of proclaiming Hippocrates (460 – 377 BC) as the father of medicine, but way before him in 500 BC Maharishi Charaka wrote the famous Charaka Samhita or Physicians’ Handbook containing about 150 chapters. The Charaka Samhita went into great detail to describe human anatomy, pathology, diagnostic procedures, and treatment for various diseases. Charaka defined eight major medical disciplines of Ayur Veda: Shailya Chikitsa (surgery), Shaalakya Chikitsa (head, eye, nose, throat), Kaaya Chikitsa (mental health), Kaumarbhrutya Chikitsa (pediatrics), Agada Tantra (toxicology), Rasaayana Tantra (Pharmacology), Vaajeekarna Tantra (reproductive medicine). Charaka also described the functions of the heart and the circulatory system in great detail. The Charaka Samhita was widely translated in various languages and Charaka was a respected medical authority in both the Arab and Roman empires.

Written in Wikipedia, The Dṛḍhbala revision and completion, the source of current texts, is dated to the 6th century CE. It can be claimed that Hinduism was first to research about medicine. Besides the superstitious believe whose seed was planted by western culture, Hindu scholars was able to give world valuable knowledge and research.

The Atharvaveda contains chapters relating to medicine, surgery and magico-religious rites  This Atharvaveda layer of text was likely compiled contemporaneously with Samaveda and Yajurveda, or about 1200 BCE - 1000 BCE. Dasgupta and other scholars state that the Atreya-Caraka school and its texts may have emerged from this older tradition, and he cites a series of Atharvaveda hymns to show that almost all organs and nomenclature found in Caraka Samhita is also found in the Vedic hymns.

The text asserts that there are four important parts to medical practice – the patient, the physician, the nurse and the medicines. All four are essential to recovery and return to health, states the text. The physician provides knowledge and coordinates the treatment, he is who can "explore the dark interior of the body with the lamp of knowledge", according to the text and Valiathan's translation.

Nutrition and diet:

Charaka Samhita ,stating that wholesome diet is essential for good health and to prevent diseases, while unwholesome food is an important cause of diseases. The text suggests that foods are source of heat, nutritive value as well as physiological substances that act like drugs inside human body. Furthermore, along with medicine, Caraka Samhita in Chapters 26 and 27, states that proper nutrition is essential for expedient recovery from sickness or surgery.

The Charaka Samhita suggests a regimen of Mamsa Rasa (meat soup) during pregnancy from 6th month onwards.

Freshly cut meat is also recommended by the text for treatment of poison, wherein the cut meat is pressed against the affected part or spot of insect or reptile bite to absorb away the poison.

 Medicinal substances from over one hundred fifty animal origins that are described in Charaka Samhita, and the chapters these are found in.These range from meat of wild animals such as fox and crocodile, to that of freshly cut fish, fish oil, eggs of birds, bee's wax. Additionally, the text describes hundreds of formulations (gruel) it asserts to be of medicinal value from a mixtures of animal products and herb or plant products, as well as inert minerals such as various salts, soots and alkalis.

Depth of Vedic knowledge is still unknown. There are still many researches carried out to know more scientific facts hidden inside the Vedas.

One day, for sure, human being will know about the reality ,which is primary objective of both science and religion. It has already written in Religious texts but due to absence of proper mathematical prove. Hinduism was considered as superstitious religion but things is about to change.