Medium chain triglycerides (MCT) oil consumption contributes to weight loss

This study found that overweight adults who used MCT oil instead of olive oil as part of a calorie-restricted diet lost about 1.7 kg more body weight over 16 weeks. However, the statistical analysis did not correct for the large number of measurements taken, meaning the results could be due to chance, and the study was too small to draw firm conclusions.

• MCT oil was tested only alongside a structured weight-loss diet, not on its own — we cannot tell whether MCT itself causes weight loss or just adds a small boost to dieting
• Key statistical problem: At least 10 body measurements were compared between groups, but no correction was applied; the main weight result (p=0.013) does not hold up under standard correction
• MCT group also lost more muscle and lean tissue than the olive oil group — a potential downside not highlighted in the abstract
• Only 31 of 49 people finished the study (37% dropped out), limiting reliability
• The comparison oil (olive oil) is itself a healthy fat, making MCT look less impressive than it might against a less favorable control
• Body weight was recorded to the nearest 0.5 kg; this coarse resolution (±0.25 kg error per measurement) is poorly matched to the small absolute between-group difference (~1.7 kg) being detected in only 31 completers, further undermining the already marginal unadjusted p = 0.013.
• Severe sex imbalance limits generalizability — ~93% of completers were female (MCT: 2M/14F; olive oil: 1M/14F); this imbalance, unremarked by the authors, precludes generalizability to men and prevents detection of sex-differential responses to MCT — a known moderator of fat oxidation.
• Fixed caloric prescription regardless of baseline weight — A fixed 1500–1800 kcal/d target regardless of baseline weight creates unequal caloric deficits; heavier individuals lost more weight by design rather than treatment effect; the baseline BMI gap between enrolled groups (olive oil 32.9 vs. MCT 29.7 kg/m²) means differential dropout likely left olive oil completers at a structural disadvantage for weight loss independent of oil type.