Better coffee can be a help.

Another option is collagen. No carbohydrates but does have calories so might not be appropriate if a person is fasting and doesn't want to break their fast. Pure protein and good for providing proper nutrients for good joints. Loaded with essential amino acids. We used it for about a year a couple years ago then got away from putting it in our coffee. We have recently started again. Pure protein. Makes the taste of coffee a bit milder.

https://www.amazon.com/dp/B087775RX7?psc=1&ref=ppx_yo2ov_dt_b_product_details

Heavy whipping cream and butter are also low carb options instead of half and half or milk.