Effects of omega-3 fatty acid supplementation on cigarette craving and oxidative stress index in heavy-smoker males: A double-blind, randomized, placebo-controlled clinical trial
Abstract
Background: Smoking-induced oxidative stress is thought to contribute to lower levels of omega-3 fatty acids in plasma and brain tissue. This lower level leads to impaired function in a dopaminergic system related to dependence and craving. Aims: The aim of this study was to evaluate the effects of omega-3 fatty acid supplementation on cigarette craving and oxidative stress index in heavy-smoker males. Methods: In this double-blind, randomized clinical trial, 54 heavy-smoker males (smoke ⩾20 cigarettes per day) were randomly selected to receive either five capsules of fish-oil-derived omega-3 fatty acid supplements (n = 27, each 1 g capsule containing 180 mg of eicosapentaenoic acid and 120 mg of docosahexanoic acid) or a placebo (n = 27) for 3 months. The psychometric evaluations (nicotine dependence and cigarette craving), biochemical markers (urinary cotinine, serum total antioxidant capacity and total oxidant status) and self-reported smoking status were used to assess the cigarette craving and oxidative stress index (oxidative stress index = total oxidant status/total antioxidant capacity). Results: There was a greater reduction in levels of nicotine dependence, cigarette craving and cigarettes smoked per day in the omega-3 fatty acid group compared to the placebo group, and the difference between the two groups increased from baseline to 3-month follow up. The model estimated that these differences were statistically significant (p < 0.001, p < 0.001 and p < 0.001,…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 3 of 5 (Moderate · trial / cohort / secondary analysis). Trials without a large randomized design, cohorts and secondary analyses give moderate evidence. Reported size: 27 participants or records.
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