We learn from stories of 'giant pumpkin' competition that the giant pumpkin are 'not' edible

• In Chiang Mai, my hometown, also have 'big garlic' competition 
• However the smaller "กระเทียมโทน" is more expensive that I don't know why ( more delicious, more nutrient?)
• I've seen some supermarket in San Francisco tell amount of nutrtion but no one care since we have to pay by weight anyway.