In India, it has been a very common practice among people to keep the body warm either by consuming ajwain, or then massaging the chest with ajwain heated in pure mustard oil. Keeps the body warm and secure from catching a cold. It is said that by applying this oil on painful joints one gets rid of joint pain too.
I know of people who grow this herb in their kitchen gardens, and consume the leaves ( I love the flavour) as a green vegetable, or seasoning on veggies, or then have them as fritters ( in a paste of bengal gram flour and fried) . The fritters taste incredible on a cool rainy day.
It plays an important role in oral hygiene too, as it kills germs in the mouth, and removes bad odor. Use of ajwain oil along with clove oil in gum pain is well known.
These are the benefits of Carrom seeds as I know, and have experienced. There may be many more.
Add on if you know, and help others benefit too. Go on!!