Studies have found decreases over time, from the mid 20th century, to now, in vitamins and minerals in fruits and vegetables. It's due to changes in varieties,

Studies have found decreases over time, from the mid 20th century, to now, in vitamins and minerals in fruits and vegetables. It's due to changes in varieties, soil depletion, and increased atmospheric CO2. https://blogs.scientificamerican.com/observations/vanishing-nutrients/ https://blogs.scientificamerican.com/observations/vanishing-... https://www.politico.com/agenda/story/2017/09/13/food-nutrients-carbon-dioxide-000511/ https://www.politico.com/agenda/story/2017/09/13/food-nutrie... There is some evidence sugar content has increased, from varietal changes, but that's about it.