Spinach is a Green food. Green foods are safe to eat as a regular part of a diet.
Guideline related quotes related to Non-Starchy and Green throughout Geoff Bond's publications.
Eat at least 2 3/4 lbs of mixed salad and vegetables per day, consisting of "Green-Green” and “Green” foods. Of these, at least 3/4 lb should be mixed salad. Also include at least 5 cups of “Green-Green” leafy vegetables or 2 1/2 cups of other vegetables per week. ~Paleo in a Nutshell p.102
Specific references to Spinach throughout Geoff Bond's publications.
At a restaurant, If green beans, broccoli, spinach, or any other green vegetable is available, ask for double portions. ~Paleo in a Nutshell p.90
"Fresh is best" is a familiar slogan and it is good for us, too. However, that is not always possible, so how do we prioritize? Broadly speaking, the "least bad" alternative to fresh plant food is frozen. Frozen plant foods, such as cauliflower, spinach, and chopped onion, have been quickly prepared in the field, and then blanched and frozen nearby. Blanching is designed to destroy certain enzymes that cause discoloration, softening, and bruising. It is likely that these are background micronutrients that are useful to the human body and become lost in the blanching process. So, here we make a compromise: In the absence of an alternative, freezing is the least of all evils. ~Paleo in a Nutshell p.92
The vegetables from above ground cover a huge range of plant parts: stems, such as asparagus from the Mediterranean and kohlrabi from Europe; buds, such as Brussels sprouts from Belgium; leafstalks, such as celery from the Mediterranean and rhubarb from Asia; leaves, such as Europe's cabbage, lettuce, and spinach; immature flowers, such as cauliflower from Europe, broccoli from Turkey, and artichoke from the western Mediterranean; immature fruits, such as eggplant from southern Asia and cucumber from northern India; mature "vegetable-fruits," such as tomato from Peru, avocado from Central America, and bell pepper from the Andes; edible bean pods, such as runner beans from tropical America; and edible fungi (mushrooms) from just about everywhere. Of course, today, these plants are grown all over the world, wherever farmers can produce them economically. ~Deadly Harvest p.56