Costco的維生素D不用國際單位而用微克mcg了，轉：換算信息

12. How can I convert 'mg' or 'mcg' to 'IU' for Vitamins A, D and E?

To convert Vitamin A as retinol: 
      From IU to mcg:  IU/3.33 = mcg
      For example: 5000 IU/3.33 = 1500 mcg
      From mcg to IU: mcg * 3.33 = IU 

To convert Vitamin A as beta-carotene: 
      From IU to mcg:  IU/1.66 = mcg
      From mcg to IU: mcg * 1.66 = IU 

To convert Vitamin D: 
      From IU to mcg: IU/40 = mcg 
      For example: 400 IU/40 = 10 mcg
      From mcg to IU: mcg * 40 =IU 

To convert Vitamin E if the product label has dl-Alpha-tocopherol as the ingredient:
      From IU to mg: IU * 0.9 = mg 
      For example:  30 IU * 0.9 = 27 mg 
      From mg to IU: mg * 1.1 = IU

To convert Vitamin E if the product label has d-Alpha-tocopherol as the ingredient:
      From IU to mg: IU * 0.67 = mg. 
      For example: 30 IU * 0.67 = 20.1 mg
      From mg to IU: mg * 1.5 = IU

所以，Costco 的維生素D3現在標為 50mcg，其實和以前的2000 IU 完全一樣。

所有跟帖： 

• 應該選擇什麽劑量的啊？ -非魚和樂- ♀ (89 bytes) () 06/19/2019 postreply 20:07:43

• 我的維生素D略低，醫生讓吃2000國際單位的，每天吃一次 -dudaan- ♂ (72 bytes) () 06/20/2019 postreply 04:51:22

• 我是你的話，就每天吃條魚，或者啃個雞腿，或者整幾塊紅燒肉，啥D都夠了，嗑藥沒有必要啊。 -ephd- ♂ (0 bytes) () 06/20/2019 postreply 10:52:36

• 謝謝 -dudaan- ♂ (65 bytes) () 06/20/2019 postreply 12:13:48

• 這個和黃芪恐怕關係不大啊 -ephd- ♂ (746 bytes) () 06/20/2019 postreply 12:43:43

• 再謝，試驗以後向你匯報 -dudaan- ♂ (0 bytes) () 06/20/2019 postreply 12:56:26