Both psoriatics and doctors tend to agree that a diet with minimal meat content is ideal for fending off Psoriasis. This was confirmed during World War 2 when large numbers of people (including individuals with psoriasis) where held in prison camps, where they were forced to live off of low protein diets.  Despite their all-around bad health, those with psoriasis saw their condition improve.

Later on, in the late 60’s, researchers thought they had discovered a new anti-psoriatic food with turkey.  They believed that turkey was low in the amino acid, tryptophan, which was thought to be the reason for this therapeutic quality.  It turns out that turkey actually has high quantities of tryptophan, and the meat itself it actually not much of an anti-psoriatic food.  Meat in general, including turkey, tends to aggravate psoriasis symptoms.

It is now believed that tryptophan makes psoriasis outbreaks worse.  In fact, tryptophan may be a vital ingredient involved in creating the skin lesions that characterize psoriasis.

You might try verifying this claim in about month when Thanksgiving comes around again.  Trying out different types of food and observing your body’s reaction is one of the most effective ways (maybe the the only way) to weed out the foods that exacerbate your psoriasis outbreaks.