Manganese absorption from milk

Study, manganese absorption from soy formulas was significantly lower than the other milks and formulas tested, ranging from 63-72%. 

Davidsson L, Cederblad A, Lonnerdal B, et al. 1989b. Manganese absorption from human milk, cow s milk, and infant formulas in humans. Am J Dis Child 143 823-827. 

Animal origin products such as eggs, milk, fish, red meats and poultry contain low amounts of manganese. Absorption of such minerals as iron, copper, phosphorus and calcium is superior from animals products than from plant-origin foods. As reported by Kies et al. (in this book), manganese apparently is better absorbed by humans from meals containing meat and fish than from those containing plant-protein replacement products. Because of the low content... 

Summarizing, it may be concluded that the mechanisms regulating iron-manganese interaction become operative in the third week of the rat s life, i.e., at the same time when the regulation of iron absorption is fully activated. Experimental evidence suggests that the onset of this regulation is not provoked by a change from milk to solid food. 

Absorption Studies of Manganese from Milk Diets in Suckling Rats... 

Comparative effects of calcium lactate and milk on apparent manganese utilization by humans are shown on Table II (7). In this study, 10 adult human subjects were fed 900 mg calcium from milk or 916 mg of calcium from calcium lactate/subject/day. Calcium provided by the basal diet was maintained constant. The increase in fecal manganese excretion with the calcium lactate supplemented diet in comparison to values when milk was the supplemental manganese source suggests that calcium supplied by milk had a lesser adverse effect on manganese absorption than did that from calcium lactate (Table II). 

Table III. In Vitro Absorption Studies of Manganese from Different Milk Diets...

Two studies in suckling rat pups found differing absorptions of manganese from different milks and formulas. The first study (Lonnerdal et al. 1987) found that the percent of Mn (added to the food source as an extrinsic label) retained (measured as whole-body retention) in 14-day-old pups fed breast milk, cow milk, cow milk formula, and soy formula, was 82, 90, 77, and 65%, respectively. 

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