Foods Doctors Eat Every Day for Maximum Healthspan

19. Mackerel (Small Oily Fish): The Low-Mercury Omega-3 Source

While fatty fish is already on the list, Mackerel is singled out by longevity advocates for its dense concentration of Omega-3s (DHA and EPA) combined with its advantageous position low on the marine food chain. This means it delivers high levels of anti-inflammatory fats with minimal concern for mercury contamination, making it an exceptionally safe and sustainable choice for regular consumption. Mackerel also provides a wealth of Vitamin D and B12, supporting bone density and cognitive function. Canned or smoked mackerel is highly versatile and cost-effective, offering a reliable, potent, and toxin-conscious source of vital longevity fats.

20. Apple Cider Vinegar (ACV): The Metabolic Stabilizer

Apple Cider Vinegar is gaining clinical interest for its ability to support metabolic health. The active compound, acetic acid, has been shown in studies to help stabilize post-meal blood sugar levels by interfering with starch digestion, and it may improve insulin sensitivity. Since high, unstable blood glucose accelerates metabolic aging and inflammation, a simple daily dose is highly beneficial. Consuming one teaspoon diluted in a glass of water before a meal—especially a carb-rich one—is an effortless habit. This simple ritual provides a metabolic nudge that helps maintain the low, stable blood sugar necessary for long-term arterial and cellular health.