Healthy eating does not guarantee a longer life - Faro de Vigo

REUTERS/EP Cient?ficos of the Institute National Aging (NIA, its acronym ingl?s) of United States, which is part of the national institutes of health, have concluded a study to long term in macaques that shows that eating a healthy diet does not guarantee a longer life expectancy against what was thought, seg?n results published this week by the journal 'Nature'.

"If there is a way to manipulate the human diet to live m?s, a?n have not found and there is quiz? ', it has recognized the bi?logo Steven Austad, Member of the Institute of studies on longevity and ageing active Barshop of the University of Texas, which has published an an?lisis on the investigaci?n in the same magazine.

Since 1934, various studies have been showing that rats, mice, fruit flies and worms fed in the laboratory with a 10 to 40 percent less than calor?as than those carrying a free alimentaci?n viv?an around a 30 per cent m?s. In fact, some research, they arrived to live twice as long.

These findings have been generating a growing community of believers seeking to improve health and living llev? to numerous compa??as and m?s to trav?s of cal?ricamente restricted diets, to develop f?rmacos that emulated the effects of the cal?rica restricci?n.

?Sin however, this new study break this conexi?n between healthy eating and life prolongaci?n. Work revel? to the mayor?a of the 57 macaques that were fed diets cal?ricamente restricted ten?an hearts and m?s healthy immune systems and lower rates of diabetes, c?ncer and other diseases than the 64 monkeys that acted as a control group. But change does not hab?a any reward in their longevity.

"One can argue that the limited cal?ricamente animals were healthy m?s", has admitted Austad, who however insists that this "does not affect their longevity".

The investigaci?n of the National Institute of aging, that arranc? in 1987, is one of the two studies that have analyzed until old age if only 70 per cent of the calor?as of one diet laboratory est?ndar prolongs life.

The other work was initiated by the National Center for the Investigaci?n of Primates in Wisconsin in 1989, tambi?n with rhesus monkeys, whose psicolog?a, gen?tica and per?odo of average life (27 a?os) are m?s close to the humans than rodents in which has been previously investigated restricci?n cal?rica.

Initial results were promising, since in 2006 reported that the monkeys to diet ten?an parec?an m?s j?venes immune systems and were less likely to suffer heart problems, diabetes, c?ncer and other diseases of old age.

But the striking was that, in 2009, 80 percent of the Wisconsin monkeys with an uncontrolled alimentaci?n hab?a killed by diseases linked to aging, while s?lo 50 percent of the apes with restricci?n cal?rica hab?a deceased.

It breaks with previous experiences
However, in this study have been observed as the elderly each group ten?an m?s animals the same incidence of tumors, heart problems, and general deterioration. While abstainers apes ten?an some better indicators of health, as the levels of cholesterol and triglic?ridos, what "a?n as? not resulted in better survival", argue the authors.

Even the monkeys that started the diet m?s j?venes between your first life a?o and 14 a?os, showed advantage with respect to the control group. In fact, the striking was that in such cases their health indicators were even worse.

Adem?s, m?s deaths from causes unrelated to ageing in this subgroup of animals who started the cal?rica restricci?n when they were j?venes were detected. "Quiz? an early cal?rica restricci?n makes them m?s susceptible to death from other causes," said Austad.

Teams from the NIA and Wisconsin contin?an collecting data to see if the cal?rica restricci?n proves to be beneficial m?s, something that the authors of the study are unlikely at this stage of the investigaci?n.