Amy Myers, MD is a two-time New York Times bestselling author and an internationally acclaimed functional medicine physician. Dr. Myers specializes in empowering those with autoimmune, thyroid, and digestive issues to reverse their conditions and take back their health. In addition, she is a wife, mother, and the successful founder and CEO of Amy Myers MD®.


Protein is incredibly important in repairing your tissues, building muscles, combating fat, balancing your hormones, and increasing your overall health and well-being.29 Healthy proteins include grass-fed beef, pork, lamb, organic pasture-raised poultry, wild-caught fish, and wild game. I purchase my meats from ButcherBox and my fish from Vital Choice. I drink a delicious smoothie using The Myers Way® Paleo Protein to meet my protein needs. It’s organic, gluten-free, sugar-free, dairy-free and sourced from non-GMO, hormone and antibiotic free, grass-fed beef with 21 grams of protein per serving. My new, limited-time-only Salted Caramel flavor has just released. It’s a great summertime treat that ups your protein without weighing you down with sugars.
Soda and other sugary soft drinks are all empty calories that may result in weight gain and health problems. Don’t be fooled—diet soda is not better. It’s full of artificial sweeteners, preservatives, and often caffeine that can disrupt your health.31,32 It can interfere with your hunger hormones, increase your appetite, and lead to weight gain.33,34 Herbal teas and green juices are a good option.
One of the main culprits for weight gain is, of course, our hormones, which start to change right around the mid-30s and into the 40s. This change in hormones, less estrogen for women and less testosterone for men, cause the fat in our bodies fat to shift to the middle of the body while abandoning other areas of the body you could care less about. That's one reason you may get a little fluffier around the middle while other parts of you actually get smaller.
3. Keep a food journal or use an app to track what you eat. As we get older, our metabolisms naturally slow down.  That means you need less food.  If you’re still eating as much as you did in your 30’s, you’ve probably had to buy a whole new wardrobe or 2 by now.  Apps like “My Fitness Pal” or “Lose It” help making weight loss goals easier by keeping you on track.  Or you can go old school and write everything down then look up the calories.  Not all calories are created equal, but one is for sure, taking in more than you burn leads to more body fat.

If you prefer a specific plan with specific rules, make sure it goes with your lifestyle, which, for most guys, gets increasingly complicated in your 40s with more responsibilities at work, with your family, and maybe even with your aging parents. A vegan diet can be hard to do in a healthy way if you live a grab-and-go existence. Meal prep is going to be a challenge if you’re never home long enough to cook. Don’t just pick what worked for a friend; pick what’s likely to work with your busy, over-40 lifestyle.


There appears to be a connection between estrogen and body weight regulation.  With lower estrogen levels, lab animals tend to eat more and be less physically active.  Levels that are too high or too low appear to lead to fat storage.  And, lower estrogen levels may also slow down your metabolic rate (the speed  at your body converts stored energy into working energy).
Between desk jobs, commutes, and family activities, many 40-somethings don’t have a lot of free time to work out. But it’s important -- for your weight and your overall health -- to fit in at least 2 1/2 hours of moderate physical activity (like brisk walking or light yard work) every week. Pencil times in to your calendar, and make them a priority.
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