Dr Michael Greger on the modern diet’s impact on longevity and the path to less inflammation and improved healthspan.
Nutrition is one of the foundational pillars of longevity, shaping not just how long we live, but the quality of those years. The balance of what we eat – and how much – directly influences our healthspan, the period of life spent in good health. Overeating can lead to chronic conditions like obesity, diabetes and cardiovascular disease, while deficiencies in essential nutrients can weaken immunity, impair cellular repair and accelerate aging processes.
Striking the right nutritional balance is not merely about avoiding disease – it’s about fueling the body to function optimally, supporting energy, resilience and vitality at every stage of life. Understanding and optimizing nutrition is essential for anyone seeking to live healthier, longer lives.
Longevity.Technology: Dr Michael Greger, a leading authority on evidence-based nutrition and the powerful role that diet plays in preventing chronic disease. He is also the founder of NutritionFacts.org, a science-based nonprofit organization that provides free updates on the latest in nutrition research via bite-sized videos, blogs, podcasts and infographics. We sat down with Dr Greger to find out more on the challenges and misconceptions surrounding nutrition and diet trends and the importance of eating well for longevity.
Michael Greger on:
Dangers of processed food
The processed food industry is a trillion-dollar industry. We’re just bombarded by ads for candy and fast food and junk food all the time, basically from when we’re born, and these try to muddy the waters in terms of the available science and exploit our natural biological triggers to take us down this other very profitable path.
Planting the seed
Diets don’t work by definition, because going on a diet implies at some point you’re going to go off a diet. Permanent weight loss requires permanent dietary change, and if it’s going to be lifelong, you want it to lead to a long life – the point of weight loss is not simply to fit into a skinnier casket. The single best diet proven for weight loss just so happens to be the safest, cheapest way to eat for the longest, healthiest life, and that’s a diet centered around whole plant foods; this is also the same diet practiced by every single one of the historical blue zones, these areas of exceptional longevity around the world, where they may have up to 10 times the rate of those reaching triple digits.
Spotlight on inflammation
Are processed foods driving inflammation and consequently leading to chronic diseases? Well, it depends what’s in them. Certainly, there are pro-inflammatory emulsifiers which are added to many processed foods and which affect our gut microbiome in a way that increases systemic inflammation in the body. An anti-inflammatory diet is essentially synonymous with a whole food plant-based diet. So, if you look at the Dietary Inflammatory Index, the single most anti-inflammatory food component in our diet is dietary fiber. What is the most pro-inflammatory food component? Saturated fat which is coming from meat, dairy, and processed junk. And also, sodium is pro-inflammatory, which, again, is found in processed foods.
From deficiency to excess
It is important to recognize that the field of nutrition was born on the shoulders of nutrient deficiencies – we used to die from diseases of deficiency, but now it has completely flipped and we are dying of diseases of excess, of excess saturated fat, trans fat, sodium and added sugar. How are you going to avoid exceeding 1500 milligrams of sodium every day, which is The American Heart Association recommendation? You eat anything in a box or a bag, it’s almost impossible, unless you’re only eating whole foods. That’s really where the messaging has to be – the science is really clear on these messages.
