 There are theoretically no restrictions on where the ketogenic diet might be used , and it can cost less than modern anticonvulsants . However , fasting and dietary changes are affected by religious and cultural issues . A culture where food is often prepared by grandparents or hired help means more people must be educated about the diet . When families dine together , sharing the same meal , it can be difficult to separate the child 's meal . In many countries , food labelling is not mandatory so calculating the proportions of fat , protein and carbohydrate is difficult . In some countries , it may be hard to find sugar @-@ free forms of medicines and supplements , to purchase an accurate electronic scale , or to afford MCT oils . 
