Rasayana Therapy

Place within Ayurveda

A review of Rasayana therapy in brain ageing describes Ayurvedic texts as setting out a group of rejuvenative measures, called Rasayana, intended to give biological sustenance to bodily tissues. The same review lists the areas of special consideration in Ayurveda as geriatrics, rejuvenation, nutrition, immunology, genetics and higher consciousness, and the authors place the system's antiquity in the Vedas. The review does not give dated manuscript evidence for that claim. Ayurveda has its own Machipedia page, which covers the wider system.

A perspective article by Ayurvedic scholars calls Rasayana one of the comprehensive disciplines of Ayurveda, and a paper on conduct-based forms states that Charaka introduced the concept of Achara Rasayana. These are statements by Ayurvedic authors summarizing their own tradition. The sources reviewed for this page do not give a dated chronology of the classical texts, and they do not list the classical branches of Ayurveda or named classical forms of the therapy, so this page does not describe them.

Modern research framing

A 2024 scoping review notes that research on rasayanas has increased steadily over the years. It treats rasayanas as natural products with rejuvenating and anti-aging aims in Ayurvedic tradition, and observes that many overlap with what biomedicine calls adaptogens, which it defines as substances that aid the response to stress. The authors write that the differences between the two concepts lie mostly in the language each system uses to describe effects, not in separate sets of substances.

Meaning of the term

Writers in this field use rasayana for rejuvenation. One Ayurvedic perspective article describes it as a way to achieve homeostasis and thereby retard ageing and prevent disease, and in healthy people as nutritional dynamics for the rejuvenation of body and mind. The scoping review of adaptogen rasayanas describes rasayanas as focused on rejuvenating and anti-aging effects. A review of brain ageing says the remedies are claimed to act as micronutrients. These are definitions offered by the authors, not laboratory findings.

Related terms

Medhya Rasayana is the term for rasayanas considered specific to brain tissue, with Ashwagandha, Brahmi, Mandukaparni and Shankhapushpi named as popular examples in one review. Naimittika is the term used for disease-specific rasayanas, in contrast to rasayanas given to healthy people. Achara Rasayana means a code of right socio-behavioral conduct. The term Ojas is traditionally associated with resilience and vitality in one review of Ayurveda in preventive care.

Metal-based preparations belong to Rasa Shastra, a specialized branch of Ayurveda that has its own Machipedia page. A review of heavy metal poisoning explains that the name of that branch is linked to mercury and says that rejuvenation therapy is one setting in which metal-containing medications are used. Rasayana is therefore not limited to herbs, and the herbal and metal-based forms carry different safety questions.

Drug-based rasayana

An Ayurvedic perspective article states that Rasayana comprises a specialized use of herbs, herbo-mineral formulations, food articles and lifestyle, together with self-discipline and social etiquette. It gives milk, ghee and honey as examples of food used in this way and says rasayanas may be age specific. Named herb examples in the reviewed literature include Amalaki (Phyllanthus emblica fruit), Ashwagandha, Brahmi, Mandukaparni and Shankhapushpi. Related herbal practice is covered on the Machipedia pages Ayurvedic Herbal Medicine and Herbal Medicine.

In one placebo-controlled study of Amalaki Rasayana, healthy volunteers aged 45 to 60 years received a preparatory body-purification regimen before the rasayana or a placebo, because the tradition describes that age range as the onset of geriatric symptoms. Purification procedures of this kind are discussed on the Machipedia page Panchakarma. This page does not describe preparation steps, formulas or doses.

Conduct-based rasayana

Achara Rasayana is described by Ayurvedic authors as a code of socio-behavioral conduct that teaches a preferred lifestyle with defined do's and don'ts, and as a way of avoiding stimuli that disturb biological rhythms or emotional harmony. The authors advocate it mainly for psychosomatic disorders and suggest dietary patterns that increase the quality called Satwa, such as milk and ghee. The paper is conceptual, and it reports no trial of conduct-based rasayana. Dietary aspects connect to the Machipedia page Ayurvedic Diet.

Metal-containing preparations

Herbo-mineral and metal-based preparations are part of Ayurvedic pharmaceutics. A review of heavy metal poisoning states that Ayurvedic texts emphasize purification of metals before use and that mercury and lead are the metals most used according to the Ayurvedic Formulary of India. It states that several medications used in rejuvenation therapy contain such ingredients. Details of processing belong to the Machipedia page Rasa Shastra and are not given here.

Aims stated by the tradition

Ayurvedic authors describe the aims of Rasayana as maintaining and preserving health, retarding age-related change, preventing disease and promoting longevity. The scoping review reports that, according to the tradition, rasayanas act by enhancing tissue nourishment, optimizing digestion and metabolism, increasing inner vitality or immunity and opening the body channels. One review of Ayurveda in preventive care links Ojas to resilience and vitality. Medhya Rasayanas are claimed to retard brain ageing and to have anti-stress, adaptogenic and memory-enhancing effects.

Uses proposed in modern writing

The Ayurvedic perspective article proposes that disease-specific rasayanas could be given alongside treatment of allergic disorders, autoimmune disorders and stress-related conditions, and says that studies at an Ayurvedic institute in Jamnagar support a role for them. The article is a perspective, and its summary of those studies is not a systematic review. Another paper proposes Achara Rasayana as both preventive and therapeutic for the condition the tradition calls Chittodvega, which its authors equate with anxiety neurosis. These are proposals by the authors.

Size and shape of the literature

A 2024 scoping review of fifteen Ayurvedic adaptogen rasayanas in oncology screened 2,733 records and tagged 584 manuscripts. About 80 percent were laboratory studies of one design type, and only 17 manuscripts, or 2.9 percent, were clinical studies. Ashwagandha and licorice were the most tagged herbs. The authors did not assess study quality and called the field early stage.

A 2026 scoping review of Maharishi Amrit Kalash, a standardized formulation developed within the Maharishi Ayurveda framework, found 13 studies meeting its criteria out of 82 records. Clinical studies were mostly exploratory, open-label and non-randomized, with one controlled pilot trial, and the authors called for randomized trials. Its authors include manufacturer affiliates.

Human studies of Amalaki Rasayana

In a placebo-controlled study of healthy volunteers aged 45 to 60 years, about 95 participants were analyzed for telomere length and telomerase activity in blood cells, alongside a group of younger volunteers. Telomerase activity increased in the group that received Amalaki Rasayana, and no discernible change in telomere length was found. These are laboratory markers, not measures of health, function or lifespan.

A randomized, placebo-controlled study in healthy aged volunteers measured DNA repair after 45 days. The abstract reports that DNA strand break repair was maintained or enhanced, that nucleotide and base excision repair did not change, and that no adverse side effects occurred. Only the abstract was read for this page, and the sample size and risk of bias were not checked. The authors stated that the results warrant further study.

Ashwagandha trials and reviews

A 2022 systematic review and meta-analysis of 12 randomized trials with 1,002 participants found lower anxiety and stress with ashwagandha extract than with placebo. It reported very high heterogeneity and rated the certainty of the evidence as low for both outcomes. A 2024 review of nine randomized trials with 558 patients reported lower scores on a stress scale, an anxiety scale and serum cortisol, with four trials reporting mild to moderate adverse events and a stated need for long-term safety data.

The National Center for Complementary and Integrative Health states that some ashwagandha preparations may be effective for insomnia and stress, that evidence on anxiety is unclear, and that evidence is insufficient for cognitive function and several other uses. These trials tested ashwagandha supplements, not the tradition's wider program of herbs, foods and conduct, so the results should not be carried over to Rasayana therapy as a whole.

Preclinical work

Laboratory and animal studies are the main source of mechanistic claims. In one mouse study, pretreatment with a Medhya rasayana formulation of Bacopa monnieri and Centella asiatica preserved performance on memory tests after an Alzheimer-type injury and altered inflammatory gene expression in the hippocampus. Findings in mice say nothing about effects in people.

Liver injury reports with ashwagandha

A case series from Iceland and the US Drug-Induced Liver Injury Network described five people with liver injury attributed to ashwagandha-containing supplements. All developed jaundice after 2 to 12 weeks, injury was cholestatic or mixed, and no patient developed hepatic failure. Liver tests normalized within 1 to 5 months in four patients and one was lost to follow-up. Four had taken other supplements, and rhodiola was a possible cause in one. The authors concluded the cases illustrate hepatotoxic potential.

The National Center for Complementary and Integrative Health states that liver injury is rare but that a number of cases have been linked to ashwagandha supplements, and that drowsiness, stomach upset, diarrhea and vomiting can occur. These reports concern a single herb sold as a supplement, not rasayana practice as a whole, and the frequency of liver injury is not established by case reports.

Interactions and contraindications

The same federal source advises avoiding ashwagandha in pregnancy and during breastfeeding. It does not recommend it before surgery or for people with autoimmune or thyroid disorders, and it advises people with hormone-sensitive prostate cancer to avoid it. It cites possible interactions with medicines for diabetes and high blood pressure, immunosuppressants, sedatives, anticonvulsants and thyroid hormone medicines. Anyone taking prescribed medicines needs to discuss any rasayana herb with a clinician.

Metal content in some Ayurvedic preparations

A 2024 review states that heavy metals such as lead, arsenic, mercury and cadmium can cause toxicity even at low exposure and that some Ayurvedic medicines may contain mercury, lead and arsenic that harm the liver and kidney if not properly prepared, prescribed or used. It cites a study in which heavy metals were found in most of the Ayurvedic remedies analyzed and urges mandatory testing of Ayurvedic products. The review does not show that rasayana herbs in general contain these metals, and the concern applies to herbo-mineral preparations.

Care boundaries and training

Rasayana therapy should not delay or replace necessary medical care. The 2024 meta-analysis noted that information on long-term safety of ashwagandha is lacking. For training, the World Health Organization published updated benchmarks for the training of Ayurveda in 2022, setting minimum requirements for Ayurveda practitioners and associate service providers, including safety in clinical use and in preparing medicines. The sources reviewed did not include a register or training standard from an Indian professional body for rasayana, so none is described here.