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Endomorph Diet: Everything You Need To Know About This "Body-Type" Diet

Stephanie Eckelkamp
Author:
January 03, 2020
Stephanie Eckelkamp
Contributing Health & Nutrition Editor
By Stephanie Eckelkamp
Contributing Health & Nutrition Editor
Stephanie Eckelkamp is a writer and editor who has been working for leading health publications for the past 10 years. She received her B.S. in journalism from Syracuse University with a minor in nutrition.
January 03, 2020
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Everyone is bio-individual—meaning, a weight loss regimen that works for me won't necessarily work for you. Of course, there are certain universal truths, like the fact that you'll probably have to eat a little bit less and move a little bit more. But beyond that, the specific macronutrient breakdown and types of foods that are "ideal" may vary quite a bit. 

Increasingly, one way people are personalizing their nutrition plan is with an endomorph diet—created for those with an endomorph body type (think bigger bone structure, higher percentage body fat, little muscle definition). It's not exactly new, but it's recently been gaining steam, and Google recently announced that it was the ninth-most searched for diet of 2019. 

But how do you know if you're an endomorph, and can your body type really dictate your nutritional needs? Here's what you need to know. 

First off, what is an endomorph?

Back in the 1940s, psychologist William Sheldon classified people into three categories (called somatotypes) based on their body composition and build: endomorphs, mesomorphs, and ectomorphs.

Ectomorphs tend to be long and lean and may have a hard time gaining fat or muscle; mesomorphs tend to be athletic, strong, and can gain or lose weight easily; and endomorphs are described as "round and soft," with a higher percentage of body fat compared to muscle and a tendency to carry their excess fat around the abdomen, thighs, and upper arms. Endomorphs are also said to have slower metabolisms that can make weight loss quite difficult. Well-known endomorphs supposedly include Marilyn Monroe, Sophia Vergara, and Beyoncé.

What is the endomorph diet?

There's no one official set of rules for the endomorph diet (like you'd find with a Whole30, for example), but there are plenty of recommendations swirling around the internet and elsewhere about how to eat for each body type. The American Council on Exercise (ACE), for example, is one of the only national organizations to feature recommendations on what endomorphs, mesomorphs, and ectomorphs should be eating; and in 2019, the book Just Your Type: The Ultimate Guide to Eating and Training Right for Your Body Type, featuring tips on how to eat and work out for your somatotype, was released.

According to the ACE, endomorphs tend to have some degree of insulin or carbohydrate sensitivity and are particularly good at converting high-carb foods into sugar, which is then stored as fat. This, in turn, is said to increase their body fat percentage along with the risk of issues like diabetes. For this reason, it's generally recommended that endomorphs eat enough protein and healthy fats and lay off the processed refined carbohydrates (cereal, bread, crackers, sweets, etc.). Carbohydrates from fiber-rich vegetables and fruits, and to a lesser extent from unrefined grains such as quinoa or rice, are said to be a better choice for endomorphs. A paleo-style diet would easily fit this framework.

Proponents recommend that endomorphs consume a pretty even distribution of macronutrients, with the following percentages of calories coming from carbs, protein, and fat. 

  • 30% carbohydrates
  • 35% protein
  • 35% fat

There is some variability in these recommendations, though—Phil Catudal, author of Just Your Type, suggests ramping up both protein and fat to about 40% and dropping carbs down to 20%, while aiming for around 1,300 to 1,500 calories per day to start.  

Some foods commonly recommended for an endomorph diet include:

  • Nonstarchy vegetables (leafy greens, cabbage, Brussels sprouts, bell peppers, green beans, cucumbers, asparagus, tomatoes, beets)
  • Starchy vegetables (squash, sweet potatoes, carrots)
  • Fruits (apples, berries, pears, citrus)
  • Healthy fats (nuts and seeds, nut butters, olive oil, avocado, avocado oil)
  • Quality proteins (salmon, eggs, poultry, beef)
  • Dairy (yogurt, cheese)
  • Whole grains (quinoa, amaranth, millet, brown rice, oats)
  • Beans and lentils

What do functional nutrition experts have to say about it?

The endomorph diet itself might be pretty healthy, but the rationale behind it is flawed. That's because "there is no science-backed evidence that shows that certain diets work for specific body types," says Frances Largeman-Roth, RDN, nutrition and wellness expert and author of Eating in Color. Additionally, it's likely too presumptuous to say that endomorphs are typically insulin resistant. "Without looking at someone's individual blood work, I wouldn't want to assume that they are prediabetic or have blood sugar issues," says Largeman-Roth. 

If you're following Catudal's recommended macronutrient breakdown for an endomorph diet, Largeman-Roth says you should also be mindful that, depending on a person's size, an intake of 1,300 to 1,500 calories may be too restrictive, and 40% of calories from protein may be too high unless you're doing a lot of endurance training. "But this is a low-cal diet," she says, "so people are likely to lose weight on it, at least initially."

On the bright side, there's likely no harm in trying an endomorph diet (which, again, can be formulated pretty similarly to a paleo diet, if desired), and Largeman-Roth says, "Everyone can certainly benefit from reducing their intake of refined carbohydrates like white bread, cookies, and crackers."

But keep in mind, every body is different, and if you're struggling to lose weight, you may benefit from a more tailored dietary approach—and don't forget a consistent exercise routine.

"I think the best strategy for anyone who struggles to lose weight and to gain muscle is to work with a registered dietitian nutritionist (RDN), who can create an individualized diet that will support their needs," says Largeman-Roth. "Also, an exercise plan with both cardio and resistance training would be advised to boost heart health and improve muscle mass."

Bottom line on the endomorph diet. 

While there's no real science to back up eating for your particular body type, an endomorph diet is loaded with foods that would be pretty damn healthy for just about anyone—regardless of their shape and size. So if you want to try it, try it, while adjusting it to meet your caloric needs. But keep in mind, many factors are at play when it comes to finding your ideal eating plan (including things like your personal microbiome makeup, says Largeman-Roth, which may play a significant role in how we metabolize food), so if you try this and it doesn't work, don't be afraid to tweak your approach or consult with an RDN—what works for your friends or family may not work for you, even if you're of a similar build. 

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