| Institute of Medicines (IOM) | Endocrine Society | Indian Council of Medical Research (ICMR) | |||
| RDA (1997) | RDA (2011) | UL (2011) | Daily Requirement (2011) | UL (2011) | Daily Requirement (2010) |
| 200 IU | 600 IU | 4000 >19 yrs. | 1500 - 2000 IU | 10000 > 19 yrs. | 400 IU |