Vegemite, Marmite, Yeast Extract and Nourishing Traditions, Paleo or GAPS

I am trying to find my own version of Nourishing Traditions, GAPS and a Paleo diet. I am more or less just trying to avoid unhealthy foods but not strictly following these diets ITMS :) So after googling for ages I still haven't found an answer to whether Yeast Extract, Vegemite or Marmite would be suitable or if it is a no no because it is processed at too high a temperature so therefore contains MSG (unintentionally)

Does anyone know?

:

---

Glutamate
Vegemite, like many foods including tomatoes, cheese, mushrooms and meat, contains unrefined glutamate[1], not to be mistaken with Mono-sodium Glutamate (MSG) -- a salt-bound, chemically-refined form of this flavour-enhancing natural amino acid. Vegemite contains 1.4% of unbound, natural glutamate amino acid, and an unknown quantity of the bound form, which also occurs naturally in many common foods.

---

From some site caled wiki cookbooks or something. But all the info is about 50/50 so I couldn't say for sure, it does have a lot of salt though