Not really. I've gone vegetarian before, testing diets to see what affects my rheumatoid arthritis. Your smell does change, a lot. What also affects your smell is how you prepare your food. Based on my experience, cumin, turmeric, garlic and sesame (both the seeds and sesame oil) tend to make one stinkier. The fattier your food, the more stink too.Ok. Hijacking thread to go comedian. If you go 2 months without eating meat, you are a full blown vegetarian !
I've pondered going vegetarian before a hunt, but having spent enough time around livestock, eating veggies only won't get rid of the human part of the smell.
And yes, eating badly prepared sushi is a great way to get intestinal parasites.