Influence of a Maharishi Ayurvedaic Herbal Preparation [MAK-5] on Age-Related Visual Discrimination

International Journal of Psychosomatics, Vol. 37, Nos. 1-4, pp. 25-29, 1990.

P. Gelderloos, SScD, H.H.B. Ahlstrom, MS, D.W. Orme-Johnson, PhD, D.K. Robinson, MS, R.K. Wallace, PhD, and J.L. Glaser, MD.

Conducted at
Maharishi University of Management, Fairfield, IA


An ancient system of natural medicine—Maharishi Ayurveda—prescribes certain herbal formulas to enhance cognitive functioning, prevent illness, and alleviate the detrimental effects of the aging process. A double-blind study was conducted to test the effect of an Ayurvedic herbal preparation, Maharishi Amrit Kalash (MAK-5), on an age-related alertness task. Forty-eight men over 35 years of age were randomly assigned to receive MAK-5 tablets or a closely matched placebo twice daily for six weeks. A visual discrimination task consisted of the identification of the exact location of a stimulus "v" within an array of "x" symbols in tachistoscopic presentations. The MAK-5 group improved significantly more in their performance of this task after three and six weeks of treatment relative to the placebo group. Performance was highly correlated with age, and because successful performance apparently requires an unrestricted flow of homogeneous attention as well as focalized concentration, it is concluded that MAK-5 may enhance attentional capacity or alertness, and thus reverse some of the detrimental cognitive effects of aging.

Please Note

MAK-5 is now called Amrit Kalash Ambrosia.

The sole purpose of these articles is to provide information about the tradition of ayurveda. This information is not intended for use in the diagnosis, treatment, cure or prevention of any disease. If you have any serious acute or chronic health concern, please consult a trained health professional who can fully assess your needs and address them effectively. If you are seeking the medical advice of a trained ayurvedic expert, call or e-mail us for the number of a physician in your area. Check with your doctor before taking herbs or using essential oils when pregnant or nursing.