I think dietary variation is better generally for your body than routine. We evolved without supply chains or consistent availability of anything except perhaps water. Routine leads to specific loads on specific systems consistently and can lead to consistent metabolite loads. Our bodies can handle an acute toxin load with better outcomes than a chronic exposure for these reasons. Peach pits contain arsenic, cherry pits cyanide. What compounds do you seek in apricot pits? Is it treatment of a condition or maintenance? 

 Good point on variation, I never really considered it from that perspective! 

 Focus on nutrients, cut down on toxins and allergens.

That elliminated grains and regular (pasteurized) dairy for me. Nutrients in grass fed beef, lamb, low toxin fish, rawmilk butter and a mix of ripe harvested vegetables.

Most important, avoid seed oils at all cost. 

 All in moderation.