The paper presented a new idea for body magnesium supplementation by magnesium ion release of magnesium products in drinking waters, analysised the degradation mechanism of magnesium and its alloys in the carbonated drinks, the magnesium ion concentration of solution and pH variation, and explored the feasibility of a magnesium alloy products as human sources of magnesium supplementation. The results show that Mg degradation is the fastest, AZ31 is followed, AZ91 is lowest. Surface corrosion layer of (Ca, Mg)CO3 is formed to inhibit the degradation; aluminum elements can effectively reduce the release rate of magnesium and the increament of pH value in carbonated beverages; the Mg ions released from the three magnesium alloy soaked in 600 mL of carbonated drinks for 2 ~ 4 h basically satisfy daily requirements of magnesium supplementation content, the change in small pH has, no significant effect on the quality of the carbonated drinks.