US - onion consumption has risen over 70 percent in the last two decades

U.S. Consumption Trends

Per capita onion consumption has risen over 70 percent in the last two decades, from 12.2 pounds per person in 1982 to 20 pounds per person in 2010.

My note: Is this rise in consumption of onions one of the causes of increase in diseases among Americans? Onions are fructans and part of FODMAPs, a group of carbohydrates.

FODMAPs are osmotic, which means that they pull water into the intestinal tract. That can cause abdominal pain, bloating, and diarrhea. When the carbohydrates enter the small intestine undigested, they move on to the colon, where bacteria begin to break them down. That process causes fermentation, and one product of fermentation is gas.

Not all carbohydrates are considered fodmaps, but many types of foods contain them, including foods that are high in fructose, like honey, apples, mangoes, and watermelon; dairy products, like milk and ice cream; and fructans, such as garlic and onions.

http://healthsummary.blogspot.in/search/label/FODMAPS

World Consumption Trends

World onion production is estimated at approximately 105 billion pounds each year. The average annual onion consumption calculates to approximately 13.67 pounds of onions per person across the world.

Libya has the highest consumption of onions with an astounding average per capita consumption of 66.8 pounds.

https://www.onions-usa.org/all-about-onions/consumption

As per history of onions, Egypt is another country where onions were widely used historically. Like Libya, Egypt is also a dry and hot weather country. 

https://www.onions-usa.org/all-about-onions/history-of-onions


Libya - 90% of the country is desert and has extremely hot weather 

The Libyan Desert, which covers much of Libya, is one of the most arid and sun-baked places on earth. In places, decades may pass without seeing any rainfall at all, and even in the highlands rainfall seldom happens, once every 5–10 years.

https://en.wikipedia.org/wiki/Libya

Summary

My note:

So, perhaps, onion as a food may be helpful in extremely dry and hot weather like Libya and Egypt.

Perhaps, it may not be suitable to eat onions in humid weather, cold weather, winters and at night time.