Final answer:
The intake of more polyunsaturated oils leads to an increased need for vitamin E to protect against oxidative damage to PUFAs. Higher PUFA consumption requires a substantial increase in vitamin E from the standard daily requirement.
Step-by-step explanation:
As people consume more polyunsaturated oil, their need for vitamin E rises. Polyunsaturated fatty acids (PUFAs) in the diet increase the body's requirement for vitamin E, which is a fat-soluble vitamin. This is because vitamin E acts as an antioxidant that protects the unsaturated bonds in PUFAs from oxidative damage. An increase in dietary PUFAs necessitates more vitamin E to provide adequate protection and prevent lipid peroxidation, which can lead to negative health outcomes such as necrosis of hepatic cells. The daily requirement for adults is typically around 10 mg/day, but with a diet that includes 1 gm/day of PUFA, the requirement can rise to as much as 35 grams/day. It is crucial to balance vitamin E intake appropriately, as an excess, or hypervitaminosis, can lead to adverse effects such as nausea.