Good question ð
For **blood tests like
Vitamin B12,
Vitamin D, and Serum Iron**, the timing and fasting state can affect accuracy:
### ð¹ **Vitamin B12 & Vitamin D**
* **Fasting not strictly required**.
* Can be done anytime of the day.
* But **morning (empty stomach or light fasting of 6â8 hours)** is often preferred because levels may fluctuate slightly during the day, and labs usually standardize morning samples.
### ð¹ **Serum Iron (and Iron Studies â
Ferritin, TIBC, Transferrin Saturation)**
* **Best done in the morning, fasting** (8â12 hours without food).
* Reason: Iron levels **vary during the day** and are highest in the morning. Food and supplements can artificially increase or decrease values.
---
â
**Recommended for you:**
* Do the test **in the morning, after an overnight fast (8â12 hours)**.
* Drink water (okay), but **avoid tea, coffee, or supplements** before the test.
* If only Vitamin B12 & D are being tested â fasting not mandatory.
* If Serum Iron is included â fasting morning sample is best.
ð So, since youâre testing **all three (B12, D, Iron)** â do it **morning, fasting, before breakfast** for the most accurate results.
Do you also want me to share how long you should stop taking **iron or vitamin supplements** before the test to avoid false readings?
Advice- self medication is hazardous, always consult ayurvedic doctor before taking ayurvedic medicine.
Consult me personally for details.
Next Steps
book consultation with us for more details.
Health Tips
kindly follow the advice.