Metrics behind the primary purpose of blood circulation, oxygen/CO2 and energy delivery (to which you allude), aren't the parameters they found fluctuated: >si

Metrics behind the primary purpose of blood circulation, oxygen/CO2 and energy delivery (to which you allude), aren't the parameters they found fluctuated: >single fingerpricks on multiple subjects varied substantially on results for basic health measures like hemoglobin, white blood cell counts and platelet counts. It would be interesting to see what sort of variance they observed.