If you are giving the oil to the baby then half of an adult dose or 1/2 teaspoon in the juice of an orange. Maintenance dose for adults is 1 teaspoon in the juice or in raw honey. If you are having tiredness use the juice. If you are having any health issues go to 2 teaspoons a day or one in the morning and one in the evening. Understand that the oil is like a vitamin pill and will help you in case of an impending illness. So by taking the oil you build up the immune system to fight cancers and other illnesses.
Heaven forbid if you ever get cancer, if you are taking the oil regularly you could fight off the disease easier.
The hope of each plan with Nigella sativa is that you do not need other things and that Nigella will alleviate all problems.