Reliability and validity of a healthy diet determinants questionnaire for adolescents.

Objective: To describe the development of a short questionnaire including a wide range of personal, social and environmental constructs in relation to a healthy diet in an adolescent population.

Design: The questionnaire was developed based on the literature, past experiences and feedback from a small pilot study (n 10). Test and retest (2 weeks later) of the questionnaire was done to investigate test-retest reliability.

Free zinc inhibits transport of vitamin C in differentiated HL-60 cells during respiratory burst.

Zinc is an essential trace element for the immune system. It is known to be essential for highly proliferating cells, especially for cells of the immune system. However, zinc and other divalent cations are known to inhibit the human neutrophilic NADPH oxidase.