A coated ferric pyrophosphate composition in which ferric pyrophosphate is coated with, per 100 parts by mass of the ferric pyrophosphate, 1 to 10 parts by mass of a polyoxyethylene sorbitan fatty acid ester or 1 to 10 parts by mass of a glycerin fatty acid ester and 0.05 to 1 part by mass of enzymatically decomposed lecithin and which has a zeta potential of -25 to -39 mV and an average particle diameter of 1 to 4 mum； and an iron-enriched fermented milk which contains 1.0 to 10 mg, in terms of iron originating from ferric pyrophosphate, of the coated ferric pyrophosphate composition per 100 g of a fermented milk having an absolute zeta potential value of 10 mV or smaller. The coated ferric pyrophosphate composition according to the present invention is usable in fermented milks such as yogurts, yogurt beverages, lactobacillus beverages, etc.本發明提供一種被覆焦磷酸鐵組合物，其係對焦磷酸鐵利用相對於該焦磷酸鐵100質量份為1~10質量份之聚氧乙烯山梨糖醇酐脂肪酸酯或1~10質量份之甘油脂肪酸酯與0.05~1質量份之酵素分解卵磷脂進行被覆而成，且ζ電位為-25~-39mV，平均粒徑為1~4μm；及一種強化鐵成分之醱酵乳，其係於ζ電位之絕對值為10mV以下之醱酵乳每100g中以源自焦磷酸鐵之鐵換算含有該被覆焦磷酸鐵組合物1.0~10mg而成。本發明之被覆焦磷酸鐵組合物係用於酸乳酪、酸乳酪飲料、乳酸菌飲料等醱酵乳。
