Everything from 3 times a day to once every 3 days is normal. It depends on how much you eat, how much of it your body can absorb, your fiber intake and some genetic variance too.
Your intestines aren't a conveyor belt, things don't constantly move. There are multiple muscles acting as a valve between different sections. Based on the factors above your body decides when to push stuff to the next section including the exit.
I usually have to poop 2-3 times after I wake up, the 1st time is usually a dud, then the moment I step out of the bathroom is when things loosen up and I can actually go.
Then sometimes a 3rd time after I've moved around a bit more getting ready.
Id agree. Swapped all my carbs to higher fiber carbs a bit ago and I'm still upset when I have to shit twice a day, I could be happily wasting that time instead of having to shit again.
Maybe you poop only once. Everything between three times a day and every three days is in the normal range. If you find yourself within this range, congratulations, you are a boring pooper.
Unless you are celiac, its likely FODMAPs your body hates. There is a correllation between the amount of gluten and FODMAPs in food that makes watching gluten get part of the picture, but you're missing the whole picture and thus likely not completely regular yet. FODMAPs are in most things. Onions are concentrated FODMAPs and so is tomato sauce.
I have to admit. Onions, garlic and mushrooms were haaaaard to remove. Ive turned to Miso and a lot of japanese and thai food with the onions removed from any recipes to get this right.
Most people don't have issues with every type in that umbrella. A full FODMAP diet is usually too restrictive for people to get the most out of their diet, and isn't recommended for most. Ideally you go full FODMAP for a month, then start reintroducing foods until you know which kinds bother you.
Sometimes it can be as simple as eliminating sugar alcohols for the lucky.
I’m about to try this diet to get to the bottom of it, but I think onions/garlic seem to be a problem. It’s not that bad a condition, but I’d like to at least be able to know when I’m signing up for indigestion.
I admire your abilities. I still have to learn how to cook without garlic or onion. I keep saying 'this is the last one' but now I'm feeling like one of those smokers who can't quit.
Fast for 24 hours then use an anal douche. This should completely clear your digestive track.
Now eat for the next 24 hours while measuring everything you eat. Every time you poop make sure to measure it, either my measuring the poop directly (poop in a bowl?) Or by measuring the difference in weight after you poop (be sure to first pee as to not measure liquids)
Now fast for another 24 hours while continuing to measure your poop. By the end of it you should have to total weight you eat and the total weight you pooped. For most foods you can probably reduce the weight by half to account for liquids (most will be pee, some will be in your poop, this will depend on the liquidness of your poop)
Now you will probably notice a few things:
you poop a lot less mass than you consume, this is because you turn a lot of it into energy.
there is a lot of water in food
you probably poop more than you think (one dump can be quite big in comparison to a meal when removing liquids)
Humans have a really good digestive tract for getting nutrients out of food. So you take a lot of the mass of the food you eat and use it in your body as energy or building material. As such your poop has significantly smaller mass because it's made up of all the stuff you're body can't use after it's pulled out so the good bits.
As for dogs my understanding is they have a shorter digestive tract to allow them to eat the nasty stuff does seem to like without getting sick so they are probably less efficient at removing nutrients and poop more proportionally to what they eat.