I was having inflamation issues in my foot from running. A wellness doctor suggested I give up dairy for 3 months because it might be contributing to my inflamation. Dairy is the #1 cause for allergic reactions, people think it's nuts or soy, but it's really dairy products, specifically cow dairy.

Yeah I know, it's sort of "out there hippie" finding a cure for my plantar faciitis by changing my eating, but the doctor had a point about the food we ingest. Think of it as clean fuel vs. not so clean fuel, both will still work, but your body will definitely function better with cleaner fuels.

Once I gave up dairy I dropped 15 lbs in 6 weeks. I have to say, it wasn't just dairy that did it. I switched out my proteins to be more fish oriented, ate more veggies, etc. I seriously felt physically better. However, to me it was probable that dairy did bad things to my body that I didn't even notice--minor inflamation, minor aches and pains. My body just didn't like dairy on a large level. (I will still have a slice of pizza or ice cream on occassion)
However to be fair, the weight loss could have made it easier on my joints and now my aches and pains are less. Who knows? I just think it's dairy.

Then I started to look into epigenetics--the thought being, our body genetics are driven by the diet of our ancestors. They ate what was available in their area and then genetics followed to adapt to those foods (through the generations) Since I am of Asian desent, I should eat more foods from the sea and more rice and typically Asians are lactose intollerant, so cutting out dairy made even more sense.

Anyhow, my 2 cents worth about weight loss.