Keto works for people of all ages. Older people tend to lose weight more slowly than younger people, but it will still happen if you follow the diet correctly. Post-menopausal women often need to be especially strict with the diet in order to get the best results, but thousands of older women have done fabulously on keto. Since older folks tend to be on multiple medications, it’s important for them to work with a knowledgeable medical professional so that doses can be adjusted safely as needed.