Is a Paleo Diet Good for Weight Loss? | Ask the Dietitian

Alexis Joseph, MS, RD, LD
by Alexis Joseph, MS, RD, LD
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Is a Paleo Diet Good for Weight Loss? | Ask the Dietitian

Whether you’re simply dabbling in Paleo cooking with flourless almond butter brownies and stir-fried cauliflower rice or adopting the diet in its entirety, it’s clear that the Paleo lifestyle is taking the world by storm. Cutting carbs and leaving behind legumes sure is trendy, but is the Paleo diet actually good for weight loss? Better yet, is it “healthy”? As with any approach to weight loss, it’s important to keep in mind that diet quality and long-term sustainability are the key factors at play. Let’s begin with the basics.


In terms of macronutrient composition, Paleo diets tend to be higher in fat and animal protein and lower in carbohydrates. Approved foods include grass-fed meats, fish, seafood, fruits, vegetables, eggs, nuts (excluding peanuts, which are technically legumes), seeds and healthy, minimally refined oils like olive, flaxseed, walnut, coconut and avocado. Foods that are discouraged include all grains, legumes, dairy, refined sugar, potatoes (though some say sweet potatoes are OK), processed foods and highly refined vegetable oils.


The good news is that this way of eating definitely has a whole-foods focus. You can’t eat highly processed foods and added sugars, although Paleo crackers, cookies and granolas are popping up left and right. Because you’re typically consuming more fat and protein, this can be a very satiating way to eat. The boost in fat also helps in the flavor department, meaning less salt is needed for cooking. Since the Internet is full of creative recipes for alternatives to bread, pastries and more using nut and coconut flours, it doesn’t have to feel super restrictive either.

Some studies suggest that Paleo diets may be effective for weight loss and/or metabolic syndrome because you can eat fewer calories without consciously trying to restrict. Essentially, consuming simple, Paleo-style foods may lead to eating less and shedding pounds more quickly. Some studies suggest it may help improve glycemic control for those with Type 2 diabetes.

The problem with the science around Paleo is that the available studies use very limited sample sizes, so take these findings with a grain of salt. And, if you’re someone who craves oodles of salt, fat and sugar with each meal, this simple eating style (Think: baked chicken with herbs, sliced avocado and steamed sweet potato) is much easier said than done.



For starters, higher intake of animal protein means more cholesterol, and animal fat increases your risk for heart disease and several cancers. Harvard researchers analyzed 90,655 premenopausal women and determined that intake of animal fat, especially from red meat and full-fat dairy, during premenopausal years was associated with an increased risk of breast cancer. Frequent consumption of meat — particularly red meat — is also associated with an increased risk of colon cancer.

Our ancestors were extremely active, hunting game and rodents, picking berries off bushes and digging up tubers as opposed to heading to Whole Foods for grass-fed butter, organic fruit and bacon by the pound. Just about every fruit and vegetable from the Paleo era looked drastically different from the ones we eat today. The strongest species have been transformed over time through careful selective breeding. Farmers sowed seeds from plants with the most desirable traits until everything became bigger, sweeter and juicier.

Prohibiting foods thought to not be available to Stone Age hunter-gatherers has some drawbacks. Contrary to popular belief, DNA tests show that humans of the Neolithic era (which followed the Paleolithic era) actually did eat grains and legumes — cooked ones, too! — such as barley, lentils and peas. You heard right: Starch granules from legumes and wild barley have been found in the teeth of 40,000-year-old Neanderthals. Modern humans weren’t the first to harvest and prepare wild grasses and seeds.

Whether or not you believe that we are biologically identical to Stone Age humans, there’s no denying the benefits of some of our modern-day eating habits. Eliminating legumes, beans and whole grains means not getting their fiber, plant-based proteins and phytochemicals proven to combat chronic diseases, namely cancer. A cancer-prevention diet is one that’s high in fiber, low in animal fat and includes lots of fruits and vegetables. Whereas diets high in animal protein and saturated fat can lead to heart disease, plant-based diets can actually reverse it.


To slim down while eating like a caveman, start by focusing on what you can eat rather than what you can’t. Pack 2/3 of your plate with plant foods by loading up on fruits and veggies and using antioxidant-packed herbs and spices for flavor. Be sure to get plenty of carbohydrates from Paleo-permitted starchy foods and fruit. Consume nuts, seeds and avocados for heart-healthy fats in moderation, but don’t overdo it, since those are very calorie-dense. Choose well-sourced lean meat and seafood in appropriate quantities. Reduce carbohydrate cravings by making breads and baked goods using coconut flour,which will add a hefty dose of fiber and plant-based protein, too!

Last but not least, keep moving! Consistent exercise is one of the few behaviors that nearly everyone agrees is healthy, both mentally and physically.


As usual, more research is needed to support many of the early, often overhyped findings of small studies on Paleo diets and weight loss. Remember that you can still reap the benefits of a balanced, nutrient-dense whole-food diet without eliminating all non-Paleo foods. If you want to eat peanuts or quinoa but still abstain from dairy and refined flour and sugar, go for it!

A Paleo lifestyle doesn’t have to be all or nothing, especially since nutrition is certainly not one size fits all. Find what works best for you, and then set small, realistic goals to maximize your health potential each day.

About the Author

Alexis Joseph, MS, RD, LD
Alexis Joseph, MS, RD, LD

Alexis is a nationally recognized nutritionist and media personality specializing in nutrition communications and intuitive eating. She founded Hummusapien, a multi-faceted food, wellness, and lifestyle website in 2011 and co-founded Alchemy Juice Bar + Cafe in Columbus, OH in 2014. Alexis also works as a writer, speaker, and nutrition consultant for food brands and commodity boards.


5 responses to “Is a Paleo Diet Good for Weight Loss? | Ask the Dietitian”

  1. Avatar Luke Jeffery says:

    It would be nice to see some balance in this. I am following a LCHF diet and have lost 40lb in 3 months. I feel better than ever; get fewer hunger pains; less heartburn; sleep better; and, most importantly, and able to stick to this diet. There are studies that show LCHF, which is fairly similar to paleo, is anti carcinogenic and that the main cause of cancer (and the thing that actually feeds cancer, is sugar or other carbs). Balance people. You discuss it, so let’s see some in your argument.

    • Avatar Bob says:

      I havr lost 80 lbs by doimg lchf for the past 18 months, i am now fit, strong and very healthy according to my doctor. Every level including blood pressure, blood sugar and cholesterol normalised within 2 months and i was taken off the diabetic register. I dont need any more proof that the general public are being lied to regarding healthy eating in the most massive and life threatening way. This article follows suit. Its about time dieticians and, gp’s, health professionals and the media woke up to the poor advice that keeps being shoved literally down peoples throats.

  2. Avatar Jimmy NoChit says:

    I too am eating LCHF, for the past 9 months, and have lost 50 lbs, lowered my bad cholesterol levels, raised the good cholesterol levels, evened out my blood sugar levels and sleep like a baby (other than using the bathroom frequently, which happens to men my age). I started this to lose weight to try to avoid back surgery, and it has worked! I am not totally pain free, but Back feels good enough to play golf again and I can travel again because a two hour flight isn’t excruciating anymore.

  3. Avatar joshalosh says:

    Should probably update your knowledge on dietary fat and cholesterol. Saturated fat is no longer considered risky as it relates to heart disease.

  4. Avatar david says:

    I just want to reiterate that these RD’s need to give it a rest on the dangers of cholesterol and saturated fat. I read another article this morning by a RD that stated that weight loss from a LCHP/F diet was water loss and only temporary! When will these folks start paying attention to the research and stop with the corporate line? I don’t get it.

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