Many people who are having serious health issues are finding relief and healing by incorporating a more specific diet, e.g., those who have Blood Type O or Blood Type A are avoiding dairy, those who have Blood Type B are avoiding chicken and peanuts, and those with Blood Type A are avoiding red meat and nightshades. Here is a complete list of all foods with recommendations for each blood type.
And some people find that complete avoidance of all grain to be necessary for healing, so they follow the SCD.