After 5 days? Nothing, You don’t need a refeed.
I’d argue you don’t need a refeed at all till you’re looking at 10+ days. Refeeding syndrome is serious, but unless you’re malnourished or incredibly skinny you’re not going to have it. 5 days isn’t nearly enough time for the average person to experience anything other than maybe some slight stomach distress, depends on what you eat.
I regularly go 7-10 days and have a huge meal to end the fast.(like easily 4000-4500 calories in an hour) Been doing it 15 years on and off. Never had anything more than some bloating and gas.
That being said, when you do finally eat after a fast. You usually feel a bit sluggish and weird for an hour or so. That’s not refeeding syndrome, that’s just your body getting an influx of electrolytes and blood sugar and vitamins/minerals. Ketosis turning off etc.
although the video is partially a marketing tool the overall advice is correct.
https://www.youtube.com/watch?v=5W_PXBgBV9U
Personally, I find bananas do better than dates or figs. However, goats milk is excellent as is bone broth/chicken broth. I suggest avoiding solid food like salmon or turkey until several hours have gone by.
The trick is to add healthy, nutritious foods without overloading the digestive system.
Start with chicken broth, then a couple of hours later get a nice lean piece of steak. I refrain from simple carbs like pasta and bread for at least a couple of days. If you ever want to go keto, doing it after an extended fast avoids the keto flu for me.
First meal is a light grilled chicken breast, salt and pepper. Get some char on it for flavour.
Second meal is a bit more, some toast with butter, a protein shake and a piece of chocolate.
Third meal is the rest of the chocolate block, a coke and a family-size bag of chips.
Fourth meal is anything else left in the house.