I've always had a stomach of steel, I could eat anything and never feel bad or get stomach cramps... I will even go as far to say I've eat food that others have got food poisoning from and I've been fine.
That is until I went paleo.
Then when ever I walked off the beaten path I would have stomach pain for a couple days, and generally feel like crap.
Then I was at a power lifting competition and people were drinking Organic milk, which comes from mostly grass fed cows.
I thought I would give this a shot as I used to drink only milk... I mean no water, no juice it was milk or nothing 24/7. When I was a kid I used to go for 10km bike rides for time and come back and drink a huge glass of milk while I was still trying to catch my breath.
So I picked up some of this milk and tried it, no issues at all. So I figured what the hell, I would add it post workout instead of protein powder and a bunch of other crap.
I had better recovery and started making huge strength gains, my shoulder press alone has gone up 24 pounds in the last month and a half. I drink one liter post workout.
So to say the least I am digging the milk.
Now, I noticed that every once in a while I would eat something that was less then stellar not paleo and had no stomach issues the next day. So I put this to the test... You could say I found the most non paleo foods I could... and ate them. In one day to see what would happen.
Just to be clear I ate a Krispy Kreme burger and added the fried egg and bacon (if you don't know what is just Google it) followed by a deep fried mars bar. The next day I had no stomach pain at all. I eat pretty strict paleo, normally. But in the interest of since I consumed these 2 items. I did however feel a little sluggish.
(It tasted like crap by they way, no need to test it yourself, the burger that is. The mars bar was delicious)
To say the least my stomach of steel that I grew up with is back, I am just wondering what is in milk (since that is the only thing I've changed) that would cause this? I've been drinking Harmony Organic unhomogenized milk.
This could easily be related to pH. Milk tends to decrease the acid in the stomach. You may be one of those individuals blessed with high acid production in the stomach...which is good kept in check because stomach acid is extremely important in immune function as it is the first big place where bacteria and viruses are killed off. Also, your body may have adapted to the large quantities of milk over a long period of time by building up more proton pumps to handle the alkalinity of the milk...which is why u feel like crap without it. My suggestion would be to watch symptoms elsewhere. Food allergies can develop with too much of anything...and milk is often a big trigger. In your case I'd be watching for asthma/upper respiratory issues and/or skin eruptions...allergens (aka toxins) have to get out of the body somehow. The four systems of the body that eliminate toxins are the gi system, the respiratory system, the skin, and the urinary tract. If there is an overwhelming toxin it will show up in one of those places. If not, drink up and enjoy!
That's a pretty interesting experience.
My guess would be that the milks providing some sort of nutrient that was low or absent from your basic paleo regimen.
Another possibility is the stuff you replaced milk with was causing some issues.