I thought this was interesting.
http://www.foodsmatter.com/allergy_intolerance/histamine/articles/q&a-joneja.html
Question:
I heard that Phosphatidylcholine has the capacity to mop up histamine but I wanted to check with the experts to make sure.
Can you tell me if it does wipe out histamine in a crisis and if it is safe to take long term? If so, what should be the dosage?
Dr Joneja says:
Phosphatidylcholines are a group of phospholipids (lipids, or fats, that contain phosphate) and are essential components of cell membranes. Lecithin is probably the most well-known. We obtain it from our diet. Lecithin is especially rich in foods such as egg yolk, soya beans, other legumes, wheat germ, fish, and meat, especially organ meats. Supplemental phosphatidylcholine has been suggested as a support for increasing brain function, retarding aging, improving skin, and several other conditions. It is hoped, that by increasing the body's supply of phosphatidylcholine (PC), cell structure will be improved. More recently, research has been investigating the role of PC in inflammatory bowel disease, specifically, ulcerative colitis (UC). Usually PC acts as an anti-inflammatory agent in the digestive tract, protecting the surface from invasion by micro-organisms in the area. However, people with UC tend to have lower than normal levels of PC in the mucus secretions, and thus are unprotected. Hence, they develop the inflammation that causes the disease.
So here is the misconception: an anti-inflammatory agent is not necessarily an antihistamine. Although inflammation does involve high levels of histamine, not all inflammation is primarily caused by high histamine levels. In the case of UC, supplemental PC protects the bowel by suppressing some inflammatory agents (for example, TNF-alpha – a pro-inflammatory cytokine) and enhancing the structure of the cell membrane so that it is not vulnerable to the effects of others.
So, in summary, anti-inflammatory agents such as PC act by a variety of mechanisms that suppress inflammatory agents, or protect cells from them.
Histamine is an inflammatory mediator in many types of inflammation, but PC will not act as an antihistamine. Antihistamines prevent histamine from entering the cell, by blocking the receptor that allows histamine access (you can find details of this activity in
several of my articles). PC does not have this capability. So – no – phosphatidylcholine will not 'mop up histamine'.