Amount of Vitamin D3 in 100 g of Vit D3 Powder
Question
Hello,
If I buy Cholecalciferol Vitamin D3 Powder 100000 IU/g 100 grams, how many grams of VitD3 does it contain?
Answer
Based on the product name "Cholecalciferol Vitamin D3 Powder 100000 IU/g", the concentration is 100,000 IU of Vitamin D3 per gram of powder.
To find the amount of pure Vitamin D3 in 100 grams of this powder, we first calculate the total International Units (IU):
Total IU = 100 grams * 100,000 IU/gram = 10,000,000 IU.
Next, we convert IU to grams. The conversion factor for Vitamin D3 is approximately 1 IU = 0.025 micrograms (µg).
1 µg = 10^-6 grams.
So, 1 IU = 0.025 * 10^-6 grams = 25 * 10^-9 grams.
Total grams of Vit D3 = 10,000,000 IU * (25 * 10^-9 grams/IU)
Total grams of Vit D3 = 10^7 * 25 * 10^-9 grams
Total grams of Vit D3 = 25 * 10^-2 grams = 0.25 grams.
Therefore, 100 grams of this powder contains approximately 0.25 grams of pure Vitamin D3.
Updated Review: May 2026
This section was added after reviewing the original answer against current product availability and formulation knowledge at the stated point in time.
As of May 17, 2026, the calculation based on the product’s label potency of 100,000 IU/g remains the primary reference: 100 grams of powder provides approximately 0.25 grams of active Vitamin D3. This is derived from the total of 10,000,000 IU, using the standard conversion where 1 µg of Vitamin D3 equals 40 IU (250,000 µg = 0.25 g).
Current technical specifications for Cholecalciferol Vitamin D3 (Powder, 100,000 IU/g) list the composition at approximately 0.27% Vitamin D3, equivalent to 0.27 grams per 100 grams of powder. This slight overage is common in manufacturing to ensure potency throughout the shelf life. For exact batch assay, please refer to the Certificate of Analysis (COA) for your specific batch. For supplement dosing, always calculate based on the IU per gram potency rather than the total carrier powder weight.
In Thailand, per MOPH Notification No. 448 B.E. 2566 (2023), the maximum permitted Vitamin D limit for ordinary food supplements is 15 µg (600 IU) per recommended daily consumption. Always verify the latest regulatory requirements for your specific product category.
References:
- NIH Office of Dietary Supplements, Vitamin D Fact Sheet for Health Professionals.
- EFSA NDA Panel, Scientific Opinion on the tolerable upper intake level for vitamin D, EFSA Journal 2023.
- Thailand FDA / Ministry of Public Health Notification No. 448 B.E. 2566 (2023).
