the oldest woman alive at 291

We find photos of a woman named Mama Efisho, which is 291 years old, according to a great-grandson of the woman, Mr. Avuefeyen.
According to him, the woman who is about two centuries old 'lives in Ellu (Edhemoko, Akaluba Street, Ellu in INLG).
Ellu is a Isoko, rural community in Delta State of Nigeria, which was founded around the 18th century.
Cultivation, cassava, are the main food consumed by people Isoko where Mama is Efisho. Although we are still awaiting confirmation of his true age, what you eat probably explains his long life.
Cassava is loaded with magnesium and copper. A diet rich in magnesium promotes healthy life, lowering your blood pressure and reduce the risk of osteoporosis. While a diet rich in copper helps support healthy nerve function. A cup of cassava contains 23 percent of the copper you need each day, determined by the Institute of Medicine.
Each cup contains cassava and 42 milligrams of vitamin E. This amount contributes 56 to 47 percent by intake recommendations of vitamin C per day for women and men, established by the Institute of Medicine.
Cassava also has nearly 20 percent of your daily intake of folate. Including more than dietary folate protects against colon cancer and reduces the risk of complications during pregnancy and provides protection against coronary heart disease.
While questioning the validity of the birth of Mama, Mr. Avufeyen said she witnessed the birth of his grandfather.
If their claims are true then Mama Efisho is not only the oldest woman in Nigeria alive, she will be the oldest woman alive anywhere.
This information comes just after public officials in Brazil reported that they have discovered the world's oldest person - a 131-year-old father of three children lives with a wife 69 years younger than him.
The Guinness Book of Records recognizes 112 years old, Yasutaro Koide of Japan as the oldest person alive.And the French Jeanne Calment, who died 122 years old in 1997, held the record for world's longest living person.
That is until social services sent a photograph of the man beside her birth certificate that said he was born in 1884.