It’s time to start trusting your gut — at least when it comes to staying young and living longer. Research has shown that the gut microbiomes of healthy older people — including those in their 90s over age 100 — often resemble those of people who are decades younger. But your gut microbiome isn’t just a matter of chance: Fine-tuning it can turn back time, leading to better metabolism, sleep, thinking and immunity, according to microbiome expert Colleen Cutcliffe, Ph.D. The gut microbiomes of healthy older people often resemble those of people who are decades younger. PaweÃâ MichaÃâowski – stock.adobe.com “Even though our metabolism, muscle strength, brain function and immune system are really different parts of the body, they’re all tied together through the gut,” said Cutcliffe, CEO of Pendulum Therapeutics , told The Post.…