Does taking a blood sample for analysis invalidate the fast?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
Taking blood from a fasting person for analysis does not invalidate the fast, because it is not among the known invalidators of the fast according to Islamic law. It is, however, preferable to avoid it if it weakens the fasting person from completing their fast.
Summary from Ftawy's records · added here
Reviewed by El Fatwa's sharia committee.
Read the full answer on Ftawyhttps://ftawy.com/en/questions/32652
Where this answer came from
- Source platform
- Ftawy
- Original fatwa ID
- 32652
- Added here
- . This is when the answer was added to El Fatwa, not the fatwa's date.
- Text
- Summary from Ftawy's records, reviewed by El Fatwa's sharia committee.
- Read the full ruling
- Read the full answer on Ftawy