Why do Africans Have Less Heart Disease, Diabetes, and Cancer? And no Depression, Osteoporosis,

Why do Africans have less heart disease, diabetes, and cancer? And, no depression, osteoporosis, arthritis, or asthma? This observation the author made soon she arrived in Rwanda, Central Africa. To find the answer she asked her then husband, a physician. But, he did not know either. Later, she moved to the USA and for many years, this question was staying dormant in her brain database. Then one day, when she started experiencing her personal osteoporosis problem, she retrieved a segment of her life when she was working in Africa. And, voila! The answer popped out. She described this answer in this story.