Conjugated Linoleic Acid (CLA)

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Conjugated linoleic acid is a naturally occurring fatty acid found primarily in dairy and beef products. It is commonly used as a dietary supplement for body composition support and metabolic health, though research on its efficacy remains mixed.

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Benefits

✓May support reduction in body fat mass, particularly when combined with exercise

✓Potentially enhances metabolic rate and energy expenditure

✓May support immune function through modulation of inflammatory markers

✓Could promote lean muscle mass retention during weight loss

✓May have antioxidant and anti-inflammatory properties

Dosage

Typical Dose

3.2–3.6 g daily

Upper Limit

6 g daily

Timing

Divided doses with meals to enhance absorption and minimise gastrointestinal effects

Forms & Bioavailability

CLA from safflower oil (c9,t11 and t10,c12 isomers)

Moderate; absorption enhanced with dietary fat

CLA from dairy sources (food-derived)

High; most bioavailable but less practical for supplementation

Synthetic CLA softgels

Moderate; standardised dosing but may cause digestive upset

Side Effects

⚠Gastrointestinal disturbances including diarrhoea, nausea, and abdominal discomfort

⚠Potential insulin resistance or glucose intolerance in some individuals with prolonged use

⚠Hepatic steatosis (fatty liver) reported in rare cases at high doses

Interactions

⚡May reduce the effectiveness of anticoagulant medications if taken in very high doses

⚡Concurrent use with insulin or glucose-regulating medications requires medical monitoring

⚡Fat-soluble vitamin absorption may be affected by high-dose CLA supplementation

Research Summary

Clinical evidence for CLA's weight loss benefits is modest and inconsistent. Meta-analyses suggest a small reduction in body fat (approximately 0.5–1.5 kg over 12 weeks) in some populations, but effects are generally inferior to exercise and diet alone. Research on immune and metabolic benefits remains preliminary and requires further human trials. Safety profile is generally regarded as good, though long-term studies are limited.

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The Bottom Line on Conjugated Linoleic Acid (CLA)

Conjugated Linoleic Acid (CLA) is moderately researched with promising but sometimes mixed evidence.It is most commonly used for may support reduction in body fat mass, particularly when combined with exercise and potentially enhances metabolic rate and energy expenditure. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.

About Our Research

This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.

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Disclaimer: This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement, especially if you have existing health conditions or take medication.