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Byline: E. M. C. Lau (1), H Lynn (1), Y. H. Chan (2), W. Lau (2), J. Woo (3) Keywords: Bone mass; Bone mineral density; Calcium; Chinese adolescents; Milk powder supplementation; Osteoporosis Abstract: Low dietary calcium intake has been demonstrated to be a risk factor for hip and vertebral fractures in studies conducted among Hong Kong Chinese. Few studies have demonstrated the effect of milk supplementation in bone accretion in Chinese children. The aim was to examine the effects of milk powder supplementation in enhancing bone accretion in Chinese children. Three hundred and forty-four children, aged 9--10 years old, were randomized to receive milk powder equivalent to 1300 mg and 650 mg calcium, and to a control group, respectively. Bone mineral density (BMD) at the proximal femur, lumbar spine and total body were measured at 6 months, 12 months and 18 months. The treatment effects were modeled using linear mixed effect models and compared using linear contrast F-tests, by intention-to-treat. Subjects randomized to milk powder equivalent to 1300 mg calcium had significantly higher increase in BMD at both the total hip (7.4+-0.4% in treatment group versus 6.3+-0.4% in the control) and the spine (8.4+-0.5% in the treatment group versus 7.0+-0.5% in the control group). Subjects randomized to milk powder equivalent to 650 mg calcium had smaller increases in BMD at the total hip and spine, although the increase in BMD at the total body was significantly higher (3.1+-0.3% in treatment group versus 2.4+-0.2% in controls). It is concluded that supplementing the diet of Chinese children with milk powder was effective in enhancing bone accretion. Author Affiliation: (1) Department of Community &amp Family Medicine 4/F, School of Public Health, Prince of Wales Hospital, Shatin, N.T., Hong Kong (2) Jockey Club Centre for Osteoporosis Care and Control, The Chinese University of Hong Kong, Shatin , N.T., Hong Kong (3) Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong Article History: Registration Date: 19/01/2004 Received Date: 01/09/2003 Accepted Date: 02/01/2004 Online Date: 17/04/2004

A new study investigates the stability of vitamins during storage at different temperatures in liquid and powdered infant milks with a similar final composition.

A study was conducted on the total lysine and available lysine in raw milk, dried milk and stored dried milk. The dye-binding lysine method was used for the analysis. The results indicate that available lysine content of the raw milk dropped 14.27% by drying process. There were losses in available lysine of dried milk to 15.45% after six months and to 17.44% after 18 months of storage at room temperature.