• 1 Lincoln University College
ASM Science Journal, 2014;8(1):55-66.


Through the six domains of the health-related quality of life (HRQOL) - physical, psychological, level of independence, social relationship, environment and spirituality or religion - ten out of one hundred randomly selected studies were analysed and evaluated as a theoretical outcome of self care using health products such as food supplements, multivitamins and minerals. A reconstructed HRQOL tool was used in the qualitative and the quantitative analysis and evaluation of the ten selected studies. A Critical Appraisal Skills Programme tool was also used in making sense of the evidences of the study trials. The Population, Intervention, Comparison and Outcome guide focused the protocol for the selection of the studies used in this meta-analysis. A probability sampling generated a uniform distribution of the populations. The manner of consuming or the route of administration, the volume and the preparation of commercially prepared health products were neither analysed nor evaluated as the exclusion criteria. Of the ten studies, nine gave a high significance to the six domains of the (O.R. = 90% / p =