CLA Dosage: How Much to Take
Conjugated linoleic acid (CLA) is a naturally occurring fatty acid found mainly in meat and dairy from ruminant animals. As a supplement, CLA is commonly marketed for body composition support. Understanding the evidence on CLA dosage helps you set realistic expectations and avoid both under-dosing and unnecessary excess.
Studied Effective Dose Ranges
The doses used in the majority of published human trials range from approximately 3.2 g to 6.4 g of CLA per day. A meta-analysis of randomised controlled trials found that CLA supplementation at around 3.2 g per day was associated with a modest reduction in body fat mass compared to placebo (Whigham et al., 2007). Effects on lean mass were less consistent across studies.
Lower doses (below 2 g/day) have not been shown to produce significant body composition changes in trials to date. Doses above 6 g/day have not produced proportionally larger effects and are associated with a higher rate of gastrointestinal side effects.
Dose by Goal
CLA's effects on body composition are modest and appear dose-dependent within the studied range:
- Body fat reduction: Most trials showing effects used 3.2–3.4 g/day of total CLA
- Lean mass support: Some studies at 3.2–6 g/day show a small benefit, but results are inconsistent
- General health (antioxidant, immune): Doses as low as 2–3 g/day have been explored, but evidence is weaker
CLA softgels typically contain 1000 mg of CLA per capsule. A three-capsule daily dose provides 3 g of CLA, which falls close to the lower boundary of the studied effective range.
Upper Limits and Safety
CLA is a trans fatty acid, but unlike industrially produced trans fats, naturally derived CLA isomers have a distinct metabolic profile. At supplement doses studied in trials, no serious adverse effects have been consistently reported in healthy adults.
However, some studies have raised concerns about the c9,t11 and t10,c12 isomers at higher doses — particularly potential effects on insulin sensitivity and blood lipid profiles in individuals with metabolic conditions. People with diabetes or metabolic syndrome should consult a physician before using CLA supplements.
Gastrointestinal discomfort (nausea, diarrhoea, loose stools) is the most commonly reported side effect at doses above 4 g/day.
Timing Relative to Dose
There is no strong evidence that the timing of CLA relative to exercise or meals makes a meaningful difference to outcomes. In most trials, CLA was taken with meals, which is the general recommendation to minimise gastrointestinal discomfort.
Splitting the daily dose across two or three meals (e.g., one capsule at breakfast, one at lunch, one at dinner) is the most common protocol and tends to reduce digestive side effects compared to taking the full daily dose at once.
Practical Protocol
- Start with one to two capsules per day with food for the first week to assess tolerance.
- Increase to three capsules per day (approximately 3 g of CLA) across two or three meals.
- Evaluate after eight to twelve weeks of consistent use alongside regular exercise and controlled nutrition.
- Do not exceed six capsules (approximately 6 g CLA) daily.
At maxfit.ee you can find CLA products including OstroVit CLA 1000 150caps, OstroVit CLA 1000 90caps, OstroVit CLA + Green Tea + L-carnitine 90 caps, and DY CLA Softgel Capsules. Browse the CLA category for the current range.
FAQ
How long does CLA take to show results?
Most randomised trials showing body composition effects ran for twelve weeks or more. Do not expect visible changes before at least eight weeks of consistent supplementation with appropriate diet and exercise.
Should I take CLA with food?
Yes. Taking CLA with meals reduces the likelihood of nausea and gastrointestinal upset and is the standard protocol in clinical trials.
Can I take CLA and L-carnitine together?
Yes — there are no known interactions. Some products combine both ingredients in a single capsule. The evidence base for each is independent.
References
Whigham, L. D., Watras, A. C., & Schoeller, D. A. (2007). Efficacy of conjugated linoleic acid for reducing fat mass: a meta-analysis in humans. American Journal of Clinical Nutrition, 85(5), 1203-1211. https://pubmed.ncbi.nlm.nih.gov/17490954/
