 [ Symptoms ] will omeprazole cause a positive thc result on a drug screen [ Disease ] within the diet itself are generally good diet recommendations  says david w grotto rd ld a spokesman for the american dietetic association dadamo does not say avoid vegetables and fruit for example but his specific recommendations based on blood type    the science is not there to support it i am not aware that anyone has duplicated his research  the presumption that each blood type will thrive on certain foods but not others also gives grotto pause i am type o and apparently i should be feasting over roadkill well that does not work for me because i do not like too much meat  overall grotto does not recommend the diet believing it pigeonholes people into dietary restrictions without taking into consideration individual needs and tastes