The 20th Anniversary edition of EAT RIGHT 4 YOUR TYPE makes this worldwide phenomenon even more accessible, and includes:
Personal and actionable health advice, including: 
A food and supplement key to reflect choices that best aid weight loss and healthy gut bacteria
Instruction on how you should exercise, the efficiency with which you burn calories, and weight loss/gain tendencies
Stress management techniques
Predisposition to diseases including dementia, ADHD, celiac disease, and even allergies
The varying influence of viruses, bacteria, infections, chemicals, and stressors that might compromise your immune system
Vaccine sensitivities for each blood type, and what to watch for