What happens to oil when you heat it?
Online Answer
When heated repeatedly, changes in physical appearance of the oil will occur such as increased viscosity and darkening in colour [1], which may alter the fatty acid composition of the oil. Heating causes the oil to undergo a series of chemical reactions like oxidation, hydrolysis and polymerization [2]..
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Very refined oils have a higher smoking point. However, Professor Martin Grootveld from De Montfort University has shown that when we heat oils and fats other, more dangerous, chemical reactions occur which alter the molecular structure of the oils and fats and create new compounds which could be harmful to our health..
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