Neither 30 nor 55: Humans begin to age at this age, according to experts.

Aging is a natural process for all people. The truth is that many people begin to notice some physical changes, and to put an end to this discussion, experts revealed the age at which humans begin to transition through this much-contested stage.

According to research conducted by Stanford University, a group of specialists analyzed the blood plasma of more than 4,200 patients with the aim of determining precisely when a person begins to age.

Based on these observations, these scientists divided adulthood into three phases: adulthood, which begins between the ages of 34 and 60; late adulthood, which begins between the ages of 60 and 78; and finally, old age, which begins at the age of 78.

(See more: Neither 60 nor 80 years old: until this age you can legally drive in Colombia ) On this matter, Michael Snyder, lead author of the study, remarked: "It turns out that the mid-40s are a time of dramatic changes, just as the early 60s were. And this is true regardless of the type of molecule being observed," he pointed out. (See more: Three weekly frequencies: Avianca announced a new destination from Bogotá and it's beautiful ) "These major changes are likely affecting our health: the number of molecules related to cardiovascular disease showed significant changes at both time points, and those related to immune function changed in people around 60 years old," the research noted. What are five tips for staying healthy before the aging stage?

Medline Plus, through its website, outlined the aspects you should consider to ensure your body reaches this stage of your life in optimal condition: 1. Eat healthy foods that provide the nutrients your body needs. Avoid foods high in cholesterol, and it is even recommended to drink plenty of fluids. 2. Exercise to prevent the onset of physical health problems. Consult your doctor before developing these routines. 3. Maintaining a healthy weight can prevent problems for your body. (See more: This is the dollar equivalent of the prize won by the winner of the Baloto Revancha.) 4. Engage in activities that keep your mind active . Learning new skills can be a solution. 5. Prioritize your mental health , and if you have any problems, consult a specialist in this field.