The ruling on taking blood samples for analysis for a fasting person

Question:
The questioner says: Performing a blood test during the day in Ramadan, and taking blood samples, does that break the fast?

Answer:
Yes, we have known previously that drawing blood from a fasting person, specifically drawing a large amount of blood from a fasting person through cupping or by medical means, breaks the fast. The saying of the Messenger (peace and blessings be upon him) regarding cupping is: Cupping breaks the fast, according to the correct opinion of the scholars, and this is due to this hadith. Similarly, drawing a large amount of blood for donation or to treat an injured person breaks the fast. As for a small amount of blood, a small sample, one or two drops, or something close to that which is not considered a large amount, this does not invalidate the fast. Yes.