This study is a continuation of another (C002, registration number NCT04647071).~The volunteers from study C002 were invited to participate in this new study and, by the end of C002, all gave 2 stool samples.~After 4 weeks of washout, the control group volunteers in C002 will begin consuming 1 capsule per day of garlic and onion extract after lunch. The intervention group volunteers in C002 will not consume anything.~During 36 weeks any incident related to the health of the volunteers will be noted. Likewise, during this time, the volunteers will maintain their lifestyle and eating habits.~At 36 weeks, 2 stool samples will be taken from all volunteers.
To evaluate the effect of daily consumption of a combination of garlic and onion extracts on the intestinal microbiota and the production of short chain fatty acids in elderly healthy volunteers living in a residence.~Likewise, any incident related to health that occurred during that period will be noted.