Some Older people can produce less HCL than they should. So it might benefit some older people more. People that have pathogens(h pylori,candida etc…) that are neutralizing the production of good acid might need to supplement with extra HCL. Some pathogens can produce excess ammonia that can neutralize beneficial acids. Go to iherb and check out the testimonials on HCL products and you can get a better idea of how it has helped some people.