The oxalate content of plants is highly variable due to factors like variety, season, and growing conditions.

“are there a lot of lists out there that are incorrect they haven't been tested and retested enough times to say how much of it is because there's different varieties or different seasons or variability we don't know you have to actually be able to test each variety and designate what variety you're testing and then repeat those tests over a number of years to see if there's any real variation in these plants and maybe source differently grown differently but that takes real money you'd have to invest huge amounts of money in each food to get a real sense of how variable the oxley content is and it hasn't been done”