Understanding Alpha-Linolenic Acid (ALA): Normal vs Optimal Ranges

?What is Alpha-Linolenic Acid (ALA)?

Alpha-linolenic acid (ALA) is the essential short-chain omega-3 fatty acid that must be obtained from diet. It is found in flaxseed, chia seeds, walnuts, and hemp seeds. ALA can be converted to EPA and DHA, but this conversion is inefficient in humans (<5-15%), making direct marine omega-3 intake important for optimal EPA and DHA status.

!Why It Matters

ALA is essential because it cannot be synthesised by humans. While ALA itself has some anti-inflammatory properties, its cardiovascular and neurological benefits are largely limited by poor conversion to EPA and DHA. High ALA intake from plant sources partially addresses omega-3 needs but does not fully substitute for marine omega-3s in vegetarians and vegans.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• ALA deficiency is rare in typical diets; low levels may reflect very low fat intake

How to Improve Your Levels

• 1Flaxseeds/flaxseed oil (highest ALA food source — about 55% ALA by weight)
• 2Chia seeds, walnuts, hemp seeds, canola oil
• 3For vegetarians: use algal DHA supplements to compensate for poor ALA-to-DHA conversion

When to Test

As part of comprehensive omega-3 profiling; vegetarian/vegan nutrition assessment.

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