Kenneth Glad
Finding the right path to good health often feels like navigating a maze. With endless food trends sweeping across social media, separating solid scientific advice from passing fads grows harder every day. Yet, looking closely at how our ancestors actually ate can offer a surprisingly clear reality check.
Popular options like the paleo lifestyle often urge people to ditch whole food groups, including grains, dairy, and legumes. Adherents cut out staples like rice, wheat, and peanuts, arguing that early humans never evolved to digest them. However, Harvard evolutionary anthropologist Daniel Lieberman points out to the Guardian that this underlying premise is simply inaccurate.
Our distant ancestors were far from picky eaters. Archaeological records show starch granules preserved on Neanderthal teeth, proving ancient diets were remarkably diverse.
Field studies of modern hunter-gatherers in the tropics show they consumed whatever grew, crawled, or swam without causing immediate harm. While some eliminate beans over fears of anti-nutrients like lectins or phytates, standard cooking reduces those compounds to completely safe levels.
Choosing better fats
Public health advice in past decades blamed saturated fats for heart issues, which inadvertently sparked a massive rise in processed carbohydrate consumption. Promoted by physiologist Ancel Keys in the 1970s, the war on fat created a goldmine for big food companies.
Manufacturers quickly flooded supermarket shelves with low-fat, high-sugar alternatives, causing obesity and chronic condition rates to surge. This widespread shift in eating habits ended up breeding massive public skepticism toward nutritional science.
Lieberman emphasizes that plant-based options remain the superior choice for long-term health. While some now argue that saturated fat from butter or cheese is completely harmless, research shows unsaturated alternatives perform far better.
“Saturated fat might not be your foe, but unsaturated fats are always your friend,” Lieberman notes. Swapping animal fats for items like olive oil or rapeseed oil consistently yields better health outcomes, cutting the risk of heart disease, cancer, and cognitive decline like Alzheimer’s disease.
Rethinking eating habits
Intermittent fasting has also surged in popularity by controlling when people eat rather than restricting specific ingredients. Methods range from strict weekly starvation schedules, like the five to two diet, to time-restricted eating within an eight-hour daily window.
Lieberman tried skipping breakfast to test the popular eight-hour approach firsthand, finding it surprisingly easy to maintain. Cycling between positive energy states during meals and negative energy states while fasting gives cells a chance to recover, offering genuine metabolic perks through natural metabolic switching.
However, extreme claims about multiplying human longevity lack solid scientific proof. While severe calorie restriction extended the lifespan of laboratory mice, fruit flies, and worms, identical landmark tests on primates showed no lifespan benefits at all.
When researchers fed macaques a healthy baseline diet instead of junk food, calorie-restricted monkeys lived no longer than normally fed ones. Starving oneself does not guarantee extra years, and claims around popular longevity schemes, like the famous Blue Zones diet, remain vastly overblown.
The middle path
Among every dietary style evaluated, the traditional Mediterranean pattern stood out as the single option most backed by hard scientific evidence. While the term often reflects an idealized ideal rather than modern local habits, its core elements remain unmatched. Built around whole grains, fresh fish, and plenty of olive oil, it reliably reduces risks of heart disease, cancer, and other chronic conditions.
Rather than eliminating entire categories of food, adopting flexible moderation works far better for long-term health. Drawing on a 7th-century BC fragment of poetry by Archilochus of Paros, which famously observes that “the fox knows many things, but the hedgehog knows one big thing,” Lieberman advises people to eat more like a clever fox that sees complexity and trade-offs, rather than a stubborn hedgehog clinging to a single rigid scheme. Hedgehogs rely on one magic bullet solution, whether that means going low-carb, raw, or completely plant-free.
Foxes recognize that nutrition involves balancing choices, where avoiding one food means substituting another. Strict elimination rarely delivers lasting wellness, whereas practicing sensible moderation allows people to enjoy diverse pleasures in abundance. Embracing balanced habits helps build sustainable health without falling for clever marketing hype or chasing impossible optimization goals.
Sources: The Guardian, Nature
