Do dietary supplements extend lifespan?

No major clinical studies prove dietary supplements extend human lifespan, according to doctors and researchers. The industry is largely unregulated, making recommendations for their use questionable. While some experts see potential for supplements to improve healthspan, evidence for lifespan extension is weak. Traditional nutrients like Vitamin D and Omega-3 have shown mixed results in trials, with some benefits noted for specific deficiencies. Experimental supplements like NAD+, spermidine, and urolitin A show promise in animal studies but lack robust human data. Experts emphasize exercise and a healthy diet as proven methods for longevity.