as of aug 2020:
however I haven’t the chance to recently test wether drinking blood extracted from a blood drawing kit will refill your blood levels. they can however still be used to obtain drinkable “water” from untainted corpses, as well as just normally bleeding corpses from the butcher screen
So to be safe just sit tight and do not engage in dangerous activities until your blood levels naturally rebalance. Grab a book or work on that huge death machine you’ve been wanting to build for a while