- Training Reference Notes

Health and nutrition education and training for Quest stockists and consumers.

Produced by the Nutrition Department, Quest Vitamins Limited,
Birmingham, B7 4AP, Tel: 0121 359 0056, Fax 0121 359 0313, e-mail:
Quest Vitamins Ltd. 2001 - No reproduction of material without permission from Quest Vitamins Ltd.



Depression is a Painful emotional reaction characterised by intense feelings of loss, sadness, worthlessness, failure, or rejection not warranted by an objective view of events. It may be accompanied by such physiological symptoms as tense posture, persistent frowning, slowing of motor and mental activity, Fatigue, lack of appetite, and Insomnia.

A person may be prone to unipolar depression at various intervals during their lifetime. Bipolar depression, however, is manic depression, where periods of intense excitement alternate with periods of acute depression. Often the individual may feel unworthy of life.


Gotu Kola
St. John's Wort (4)
Siberian Ginseng (6)
Valerian (5)


B Complex
Vitamin B6 (1)
Vitamin B12 (2)
L-tyrosine (3)
Vitamin C


1. Adams PW, Wynn V, Rose DP, et al. Effect of Pyridoxine hydrochloride (Vitamin B6) upon depression associated with oral contraception. Lancet 1973;I:897-904.
2. Ellis FR, Nasser S. A pilot study of vitamin B12 in the treatment of tiredness. Br J Nutr 1973;30:277-83.
3. Gelenberg AJ, Wojcik JD, Growdon JH, et al. Tyrosine for the treatment of depression. Am J Psychiatr 1980;137:622-23.
4. Ernst E. St. John's Wort, an antidepressant? A systematic, criteria-based review. Phytomedicine 2(1): 67-71, 1995.
5. Oshima Y, et al: Antidepressant principles of Valerian fauriei roots, Chemical Pharm Bulletin, 43(1), Jan 1995, p 169-170.
6. Liu CX, et al: Recent advances on ginseng research in china, Journal of Ethnopharmacology, 36(1), Feb 1992, p 27-38.