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Macronutrients – Lipids

Unsaturated Fatty Acid

A fatty acid with one or more double bonds, typically liquid at room temperature, found in plant oils and fish.

Definition

An unsaturated fatty acid is a fatty acid containing one or more double bonds between carbon atoms in its chain, resulting in 'kinks' in the molecular structure.

How it works

Unsaturated fatty acids have one or more double bonds (C=C) in their carbon chain, which creates a bent or kinked molecular structure. This structural difference from saturated fats makes them liquid at room temperature and more vulnerable to oxidation. There are two main categories: monounsaturated (one double bond) and polyunsaturated (multiple double bonds). Unsaturated fats are generally considered healthier than saturated fats because they help reduce LDL cholesterol and support cardiovascular health. Most health organizations recommend consuming more unsaturated fats, particularly from sources like fatty fish, nuts, seeds, and plant oils.

Role

Unsaturated fatty acids support cardiovascular health, reduce inflammation, and are essential components of cell membranes.

Examples

  • Olive oil
  • Avocado
  • Almonds
  • Salmon
  • Sunflower oil
  • Walnuts
  • Flaxseeds
  • Chia seeds

Recommendations

Aim for unsaturated fats to comprise 20-35% of your daily calories. Prioritize polyunsaturated and monounsaturated sources over saturated fats. Choose extra virgin olive oil, fatty fish, nuts, and seeds regularly.

Key takeaway

Unsaturated fats are heart-healthy alternatives to saturated fats that support overall cardiovascular and metabolic health.

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