Krill oil during alternate-day fasting: smaller declines in body tissue and grip
Adults with overweight who took krill oil during alternate-day fasting had smaller declines in fat-free mass and handgrip strength than those taking vegetable oil. Weight loss did not differ significantly.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
During alternate-day fasting, adults with overweight taking krill oil had smaller declines in fat-free mass, meaning body mass excluding fat, and handgrip strength than those taking vegetable-oil placebo. The differences in change were statistically significant. Weight loss did not differ significantly between groups, so the trial did not show a clear added weight-loss effect.
This was a short trial in adults following a specific fasting program. The abstract does not report longer-term outcomes or adverse effects, and its findings cannot establish effects outside that setting.
What researchers found
Change in body mass excluding fat
Compared with vegetable-oil placebo after 8 weeks of alternate-day fasting; the between-group difference in change was statistically significant.
Body composition and strength were separate measures
Researchers measured body weight, fat-free mass and handgrip strength before and after the program. Fat-free mass should not be read as a direct measurement of muscle alone, while handgrip strength describes the specific strength test used.
The group comparison supports the result
The authors reported significant differences between groups in changes in fat-free mass and grip strength. That comparison supports the central result; simply finding a significant decline in one group and a nonsignificant change in another would not establish a difference.
The original publication
Benefits of Krill Oil Supplementation During Alternate-Day Fasting in Adults With Overweight and Obesity: A Randomized Trial.
Alblaji M, Gray SR, Almesbehi T et al.
Obesity (Silver Spring) · 2025
- PubMed ID
- 40671417
- Record checked
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