Walnut is a Green-Green food. Green-Green foods are safe to eat as a regular part of a diet.
Guideline related quotes related to Nuts and Green-Green throughout Geoff Bond's publications.
For nuts group, Consume at least three servings of “Green” foods per week. ~Paleo in a Nutshell p.103
For nuts group, Consume at least seven servings of “Green-Green” foods per week. ~Paleo in a Nutshell p.103
For nuts group, Restrict total nuts servings per session to one. ~Paleo in a Nutshell p.103
For nuts group, Restrict total nuts servings per day to two. ~Paleo in a Nutshell p.103
Nuts should be raw and fresh. ~Deadly Harvest p.151
Specific references to Walnut throughout Geoff Bond's publications.
Almonds, walnuts, pistachios, and chestnuts are all native to the Fertile Crescent and were domesticated early during the farming revolution. ~Deadly Harvest p.65
Omega-3 EFAs are found in plants and animal matter. In plants, the most common form is alpha-linolenic acid (ALA), found particularly in walnuts, flaxseed, hempseed, and rapeseed (canola oil). In animals, omega-3 oils are particularly found in "oily" fish, such as sardines, salmon, trout, and tuna. ~Deadly Harvest p.104
Nuts are a natural food for humans to be consuming. All tree nuts are generally fine. Examples are walnuts, almonds, Brazil nuts, and filberts. However, chestnuts and coconut do not fit into this tree nut category. Chestnuts are mainly starch and so are included in the starchy vegetable group; coconuts are mainly oil and are included in the fats and oils group. Peanuts are a legume and are included in the previous group. ~Deadly Harvest p.151
Walnuts have the exceptional property of being rich in omega-3 oil. However, it is essential that the walnuts be fresh, because their omega-3 oil turns rancid very easily and becomes an oxidized fat particularly harmful to cardiovascular health. ~Deadly Harvest p.151