Andy, That's a good example. There's no way to know if anything is really organic unless you work the soil yourself. And no traveler is going to stay long enough to do that!
As for lemons, they are on The George Mateljan Foundation's list of worlds healthiest foods. Nutrient density is what they look for in food and drinks. I think it's good criteria for healthy consumption.
The World's Healthiest Foods Enjoy the lemonade. Eric
THINKING I have been thinking for a long time, there are foods, and there are foods that are sold. There are foods that people say to eat, however, they are not available, and often the reader has been going to some super large Walmart too much or Tesco, I think and buying too much of anything.
Anything is not available, and the list of the most Healthy Foods is by far not really available on the planet, especially getting specific.
I took the list, and am showing what is common and available from the list, I put a number 1 next to the most common, sometimes the list does not have listed what people eat, for instance it says brown rice, and all I see is White rice, unless the brown rice really looks white.
List of food you can buy in the world easy:
VEGETABLES Cucumbers 1 Garlic Mushrooms IN CAN Olives Onions Potatoes Tomatoes