Tex,
The book that is the source of the ICUS diet was published in 1988. Understandably, it's not going to be the final word on histamine-restriction because there's always new research. Also, histamine isn't a stable factor. Amounts can vary depending upon the age of a particular food, for example. The Vickerstaff-Joenja book is used as a reference often, so I think it's fairly reliable. The Histame.com site also has a list of 'helpful tips,' which
are helpful. They explain why bread and confectioneries are typically a problem because they contain yeast.
It
can be confusing. I've found you need to
really study all the information and correlate the lists to truly understand this. It's not easy because there is no conclusive information. Is the diet quite restrictive? Yes!
You said:
It opens the question of whether or not some of us truly are intolerant of virtually all food.
I think that may very well be possible for some of us. If you have food chemical intolerance or a mast cell problem
and MC, it's really difficult!!!! That's the position I think I'm in.
There's a hospital in Australia with an allergy unit that has designed a low food chemical diet-low in amines, salicylates and glutamates. They say if you are sensitive to one natural food chemical, it's likely you are sensitive to others as well and additives too. So yes, some people may be intolerant to many foods. They've devised an elimination diet to help people determine if they are sensitive to food chemicals; histamine is just one of them! You can read the overview here:
www.cs.nsw.gov.au/RPA/Allergy/default.htm
These are some of the symptoms they list:
Symptoms triggered by food chemical intolerances vary from person to person. The commonest ones are recurrent hives and swellings, headaches, sinus trouble, mouth ulcers, nausea, stomach pains and bowel irritation. Some people feel vaguely unwell, with flu-like aches and pains, or get unusually tired, run-down or moody, often for no apparent reason.
They have 20 years of experience and research. They give considerable credence to salicylate problems, whereas Vickerstadd-Joneja has a different view on that. I got the booklets for the elimination diet and it has been helpful in reducing my symptoms. But I still cannot eat most of the foods on the low list so there's more going on. Still trying to figure it out!
Their theory of food intolerances says:
They are triggered by food chemicals which cause reactions by irritating nerve endings in different parts of the body, rather in the way that certain drugs can cause side-effects in sensitive people.
They say they are not an immune reaction. Sometimes I definitely feel like a raw nerve ending!
The Failsafe Diet by Sue Dengate is the same as the hospital diet...
www.fedupwithfoodadditives.info/
So there's yet another theory about food intolerance!
It
is confusing and I've been trying to sort out for quite a few years now why I'm never able to expand my ability to eat more foods. For a long time I thought it was the food chemical problem, but more recently I got on to the possibility of mast cell activation disorder. Of course, there's also the MC, but does anyone with MC have food intolerance problems that never resolve?
And here's the whole elimination diet:
http://www.plantpoisonsandrottenstuff.i ... -diet.aspx
You see there are many 'low' foods that someone with MC would not eat...cabbage, brussel sprouts, celery....The booklets from the hospital are even more helpful because they list low to very high foods in groups. But not sure that is even my problem, although it does include histamine.
Some people are born with a sensitive constitution and react more readily to food chemicals than others. The tendency is probably inherited, but environmental triggers — a sudden change of diet, a bad food or drug reaction, a nasty viral infection (for example, gastroenteritis, glandular fever) — can bring on symptoms at any age by altering the way the body reacts to food chemicals. Women often become more sensitive in their child-bearing years, perhaps due to hormonal changes, which might be nature’s way of preventing pregnant and breast-feeding women from eating foods that could harm the developing baby.
Gastroenteritis can bring this on though so there could be a connection to MC for some.
I hope I haven't confused people by even introducing the topic here!!!! So sorry if I have and sorry for all the disconnected rambling.