4 - 12 years old: 2 - 3g per serving, once a day or every other day, continuously consumed for 3 months.
12 - 18 years old: 5 - 8g per serving, once a day or every other day, continuously consumed for 3 months.
18 - 60 years old: 3 - 5g per serving, once a day or every other day, continuously consumed for more than 3 months.