Me neither, I can't get MSG at all. That is an instant headache. Yeah, I can't wear my glasses while working out, but I do use solar spectrum bulbs in my workout room. My glasses are too weird and orange to be seen in! I didn't know that yeast extract and caramel color were MSG, oh my goodness, thank you for telling me. I really didn't know that.RapidBreath: I had migraines everyday for years, turns out I can't handle eating any form of processed glutamates like msg, yeast extract, caramel color, etc... Once those migraines cleared up I discovered the florescent lights and perfumes also do me in. I hear you on the glasses, I have a pair of axon optics glasses that help, but they won't work well for working out. I can't handle sweating in glasses! I always take them off when I have to meet with people too because they are so tinted they just don't make a positive fashion statement, as you know!