WHEN TO USE IT In cases of deficiency or increased need for Vitamin D. Especially indicated for growing children and young people. HOW TO USE IT For best absorption, intake on a full stomach is recommended. Children 3-10 years: 4 drops/day (10 mcg/400 IU) Children, pregnant and lactating women: 6 drops/day (15 mcg/600 IU) Adults: 20 drops/day (50 mcg/2000 IU)