Too bad the article isn't posted so everyone can read it. Critical
points are:
1) flax hull lignans are not flax seeds; they are in the hull that
surrounds the seed and has been removed from the seeds you buy at retail.
2) one teaspoon of hull lignans contain the nutritional equivalent of
two GALLONS of flax seed! That is a critical difference.

The important lignan is SDG (secoisolariciresinol diglucoside).

Be careful of preground flaxseed. It goes rancid rather fast, as does
the oil. The best bet is to buy the seeds (which have a very long shelf
life) and use one of those cheap ($10-$15) coffee grinders to grind them
just before you use them. Don't use that grinder for anything else.

My girlfriend also has diverticulitis. Has to be real careful to avoid
eating seeds (even in tomatoes, cucumbers, zuccini, etc.) and avoids
black pepper. She's be diagnosed with a wheat (but not gluten) allergy.
Since being off wheat for two years, her bouts of diarrhea and bloating
are much less. She deals with her dairy sensitivity by using Lactaid
tablets. Aspartame (Nutrasweet, Equal) can be a trigger in some people, too.

Ray