Risk Assessment (for deficiency and toxicity):

Deficiency:
- Symptoms: Muscle weakness, impaired coordination, nerve damage, immune system suppression, and vision problems.
- Causes: Malabsorption disorders (like cystic fibrosis, Crohn’s disease), low-fat diets, genetic disorders affecting vitamin E metabolism (e.g., abetalipoproteinemia).
- At-risk groups: People with fat malabsorption, individuals on extremely low-fat diets, and premature infants are at higher risk for deficiency.
Excess (Toxicity):
- Symptoms: High doses of vitamin E can increase the risk of bleeding, particularly in people taking anticoagulants (blood thinners), and may cause nausea, diarrhea, fatigue, and blurred vision.
- Toxic dose: The tolerable upper intake level for vitamin E is typically around 1000 mg/day for adults, far higher than what would be obtained through food sources.