A detailed study was conducted on 13 healthy subjects as per medium.com, four meals were presented before them which consisted of freshly boiled potatoes, boiled or cold stored potatoes, boiled and cold stored potatoes with vinegar or white wheat bread, fresh boiled potatoes and boiled and cold stored potatoes.
These differently cooked potatoes comprised of 20 carbohydrates and were given for breakfast followed by an overnight fasting.
Blood samples were taken at different time intervals, the resistance of cold-stored potatoes was increased from 3.3% to 5.2%.
Whereas the resistance of cold potatoes with added vinegar got reduced by 43% and 31%.
A difference of 28% was seen in the cold stored potatoes as compared to the fresh boiled ones.