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.
This page is available in