Fish Oil for Aging Muscles: What 14 Studies Actually Show
Fish oil is being pitched as armor for aging muscles, but what does the evidence actually say? A 2026 umbrella review pooled seven RCTs and seven meta-analyses in adults 55 and older. It found modest but measurable strength gains, with the clearest signal for lower-body strength and function. Grip strength, walking speed, and upper-body strength were far less certain, and heavy overlap among the studies means the evidence is shakier than it looks. Here is what it means, who it may help, and who should check with a doctor first.
Krill Oil Cut Muscle Loss on a Fasting Diet by Up to 6x in a Trial
Dieting hard often means losing muscle along with fat, but a new randomized trial suggests one supplement may change that. In 41 adults doing 8 weeks of alternate-day fasting, krill oil and placebo groups lost the same body weight (about 4.6 vs 4.5 kg). Yet the krill group lost just 0.2 kg of fat-free mass versus 1.2 kg for placebo, and held onto handgrip strength too. Before you stock up, there are catches: the sample was small and the capsule also contained astaxanthin and choline. Here are the numbers, the dose and who should skip it.
Fish Oil Swapped Fat for Muscle in 6 Weeks. Scale Didn't Budge.
What if the scale doesn't move, but your body quietly trades fat for muscle? A double-blind trial of 44 healthy adults found that 6 weeks of fish oil (about 2.4 g EPA+DHA daily) shifted body composition by roughly half a kilo each way, with body weight unchanged. A drop in salivary cortisol tracked with the changes, though that link is only correlational. Resting metabolic rate didn't budge, and the sample was small. Here's what the numbers really show, and how to use them sensibly.