Comparison of trace elements in milk of four species.

The research focused on comparing the trace elements found in the milk of four species – guinea pigs, dairy cattle, horses, and humans.

Objective and Methodology

• The key goal of this study was to understand and compare the presence and levels of different trace elements in the milk of four distinct species – guinea pigs, dairy cattle, horses, and humans.
• For this comparison, milk samples greater than 4 ml were obtained from each species.
• These samples were then processed and analyzed using a method known as inductively coupled argon plasma spectroscopy. This technology is often applied in the analysis of metal and mineral content.
• The trace elements that were looked for included aluminum (Al), boron (B), barium (Ba), copper (Cu), iron (Fe), lithium (Li), manganese (Mn), molybdenum (Mo), silicon (Si), strontium (Sr), titanium (Ti), and zinc (Zn).

Key Findings

• When comparing all four species, the study found that the concentration of specific trace elements varied significantly.
• In case of zinc (Zn), it was found in the highest concentration (over 4 ppm) in the milk of guinea pigs while the lowest was in mare milk (less than 2 ppm).
• Strontium (Sr) level was high in the milk of guinea pigs (over 1 ppm), decreasing down to less than 0.1 ppm in human milk.
• For iron (Fe), the maximum content was found in guinea pig milk (over 0.7 ppm), with the lowest found in cow’s milk (less than 0.2 ppm).
• High levels of copper (Cu) were found in guinea pig milk (over 0.5 ppm) and a bare minimum (.05 ppm) in cow’s milk.
• The concentration of other elements like boron (B), silicon (Si), aluminum (Al), and barium (Ba), though varied across species, fell within a relatively narrow range.
• Lithium (Li), manganese (Mn), and molybdenum (Mo) were found to be quite low, all less than 0.04 ppm for all species. Particularly, the content of manganese (Mn) in milk was pointed out as surprisingly low given its importance for body functions.

Conclusion

• This study provides a comparative perspective on the trace elements present in the milk of different species, emphasizing how the nutritional profile can vary significantly.
• However, it notices a surprising low content of manganese, a critical element for many bodily functions across all species studied. This aspect calls for further research on how dietary intake may influence these trace elements’ presence in milk.