When I searched older posts on blood donation, most responses recommended not counting it because it's just a small amount of extra calories to replace donated blood over 4-6 weeks. I feel like that is probably reasonable advice for people losing weight.
However, for maintenance, I'm trying to keep an accurate record of calories consumed and used, so it seems counterintuitive to just ignore something that's perhaps 450-650 calories, depending on which donation I do. I wouldn't eat a 500 calorie item and not record it, or do a 500 calorie exercise and skip adding it.
In my case, I am donating platelets, which I found online is about 450 - 500 calories over a week to replace, so about 65 - 70 calories per day.
How would you handle something like this, especially the data-driven people who like to keep as accurate as possible records? I could easily just add the full amount as a negative the day of, since I try to balance calories over an entire month, not each day.
Perhaps it's important to know that I am still struggling to stabilize my weight and stop my slow loss of about a third a pound a month, so ignoring a largish calorie expenditure seems like a bad idea for me.