Fat Deficiency: Essential Fatty Acids, Vitamin Absorption & Health Risks

While no disease is caused solely by fat deficiency, inadequate dietary fat leads to multiple problems:

Consequences of Very Low Fat Intake

• Essential fatty acid deficiency (EFAD) – Linoleic (ω-6) and α-linolenic (ω-3) acids cannot be synthesized. Causes dermatitis, hair loss, poor wound healing, growth failure, increased infection susceptibility.
• Fat-soluble vitamin malabsorption – Vitamins A, D, E, K require dietary fat for absorption. Deficiencies → night blindness, osteomalacia, coagulopathy, hemolytic anemia.
• Skin & hair deterioration – Dry, scaly skin; brittle hair.
• Hormonal disruption – Cholesterol is precursor for steroid hormones.
• Paradoxical weight gain risk – Very low-fat diets often high in refined carbs → insulin spikes → fat storage.
• Increased chronic disease risk – Low ω-3 intake linked to CVD, cognitive decline, depression.

Healthy Fat Intake

• 20–35% of calories from fat (AMDR).
• Emphasize unsaturated: olive oil, avocado, nuts, seeds, fatty fish (ω-3).
• Limit saturated (<10% calories), avoid trans fats.

Balance, not elimination, is key.