Hi blobgob,
A good question. According to Chat GPT, the boost to neutrophils is only for a matter of some hours, but that’s not too bad in the context of a daily dose (there is also of course scope to nibble the stuff over the course of a day). The bigger the dose, the longer and greater the effect (within reason).
There is also a boost to ‘activation’ of neutrophils, but the highest possible cocoa percentage that you can handle is recommended to keep sugar consumption down.
Regards
Rabbit