I unborked it

code/modules/mob/living/carbon/human/human.dm

@@ -1308,7 +1308,7 @@
 /mob/living/carbon/human/revive()
 
 	if(species && !(species.flags & NO_BLOOD))
-		var/blood_reagent = species.exotic_blood ? species.exotic_blood : "blood"
+		var/blood_reagent = get_blood_name()
 		vessel.add_reagent(blood_reagent, max_blood-vessel.total_volume)
 		fixblood()
 

code/modules/reagents/Chemistry-Holder.dm

@@ -102,6 +102,11 @@ var/const/INGEST = 2
 		if (!O.reagents )
 			return
 		R = O.reagents
+	else if (istype(target, /mob/living))
+		var/mob/living/M = target
+		if(!M.reagents)
+			return
+		R = M.reagents
 	else if(istype(target, /datum/reagents))
 		R = target
 	else