How long after turning vegetarian does anemia occur?

Why askng? Why do you take the risk? Take multivitamin therapeutic once or twice daily for prevention. Vitamin B12 is important, might need to take a shot 500-1000 mcg every 3-6 months. Vegetarian food leads t also iron and minerals..... The time taken to be anemic is ill-defined since it depends on the type and quality and quantity of the vegetarian food. Be smart. Be wise. Prevent anemia from happening.