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Table 1 Human milk composition during the first year of breastfeeding [12]

From: Macronutrient balance and micronutrient amounts through growth and development

Age (months) Energy (kcal/g) Protein (g/l) Vitamin A (μmo/l) Vitamin D (ng/l) Vitamin B6 (mg/l) Calcium (mg/l) Iron (mg/l) Zinc (mg/l)
1 0.67 11 1.7 645 0.13 266 0.5 2.1
2 0.67 9 1.7 645 0.13 259 0.4 2
3 0.67 9 1.7 645 0.13 253 0.4 1.5
4 0.67 8 1.7 645 0.13 247 0.35 1.2
5 0.67 8 1.7 645 0.13 241 0.35 1
6 0.67 8 1.7 645 0.13 234 0.3 1
7 0.67 8 1.7 645 0.13 228 0.3 0.75
8 0.67 8 1.7 645 0.13 222 0.3 0.75
9 0.67 8 1.7 645 0.13 215 0.3 0.75
10 0.67 8 1.7 645 0.13 209 0.3 0.5
11 0.67 8 1.7 645 0.13 203 0.3 0.5
12 0.67 8 1.7 645 0.13 197 0.3 0.5