When I eat it by itself....with no other foods...yes I react to the glutamates.
Also I notice I can't "hide" it in gluten-free dishes like rice or veggies. It goes better in my spelt Baking Powder Drop Biscuits. But I usually can't have more than one serving of Yeast per day or else I can get a migrane, or cleanse-out-of-control boomerang effect....and it starts exuding from the tissues around my lips for the next 12 hours.....as the body gets rid of it..... (pass the napkins, please...)

Quoted from Andrea AWsec

Love it-- but whole foods brand has no additives.

I sprinkle it on my breakfast and make salad dressing with it.

It makes a great "cheese" substitute for those of us who can't have cheese.. like me..
I sprinkle it on cooked vegetables, soups, and on vegie burgers for that "cheezeburger" flavor..

Quoted from Seraffa

But I usually can't have more than one serving of Yeast per day or else I can get a migrane,

I get a migraine from red wine.. especially California wine.  I can only tolerate Italian or French Pinot Noir.  My son bought me a bottle of Cavit Cabernet Sovengion and it triggered a migraine..I like the taste better but it doesn't like me...Oh and I can have Port. My favorite is Sandman..Portugese.. It's very good..

For those who react negatively, what symptoms do you get, other than migraine?

Skin rash, itching all over..especially on my back, joint pain, weight gain, bloating, reduced immunity, blurred vision, nausea, stuffy nose...shall I go on?

After eating Nutritional Yeast daily for many months, sprinkled on a rice cake with almond butter, I have completely stopped eating it.

I've had a few mysterious symptoms for many months and finally realized that they started a few weeks after I started eating the NY.

I had itching in my mid-back, with no rash, bumps or anything else visible.
The sole of my right foot had a strange nerve sensation, sort of a drilling feeling.
The top of my left foot and up my left shin felt a pins & needles sensation.

All of these came and went periodically throughout the day and didn't seem to be connected to anything else I was doing.

I haven't eaten the yeast in a couple of weeks and all 3 of those things are gone!  I miss eating it because I love the taste, but it seemed to be doing something unhealthy to my nerve endings.