The goal of this double-blind, randomised, controlled trial is to determine the effects of LC n-3 PUFAs supplementation on changes in body composition and muscle strength during body weight loss and body weight maintenance among healthy adults living with overweight and obesity. The main research questions: * Is supplementation with LC n-3 PUFAs during dietary weight loss intervention (alternative-day fasting) attenuate the reduction in fat-free mass and muscle strength? * Is supplementation with LC n-3 PUFAs during dietary weight loss intervention (alternative-day fasting) provide additional impact on appetite related hormones (Acylated ghrelin, GLP-1, and PYY) and cardiometabolic risk factors (Post prandial inflammatory markers and Triglycerides)? Participants will be randomly assigned to a PLACEBO (Mix-vegetables oil) or LC n-3 PUFAs group (krill oil) (1:1 basis). Both groups will follow a dietary weight loss intervention (Alternate-day fasting). The study will last for 20 weeks that divided into 3 phases: four weeks of the preparation phase, eight weeks of body weight loss phase (Alternate Day Fasting), followed by eight weeks of body weight maintenance phase (regular diet).
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Changes in fat-free mass
Timeframe: 4 weeks, 12 weeks, and 20 weeks
Muscle function by Handgrip strength
Timeframe: 4 weeks, 12 weeks, and 20 weeks
Chair rising test
Timeframe: 4 weeks, 12 weeks, and 20 weeks
Fat mass
Timeframe: 4 weeks, 12 weeks, and 20 weeks