A dirty keto diet is a high-fat, low-carb diet that doesn’t take the quality of your food into account. People who follow this diet don’t focus on where their food comes from or if it’s nutrient-dense.
Dirty keto (also known as lazy keto) is less about a holistic approach to your overall health and more about loose eating habits — as long as they fit your keto macros.
This “quick and dirty” approach to the ketogenic diet replaces the meal prep, cleanup, and “hard” work of keto with food that could be bad for your body in the long term. Still, some people are convinced it’s good enough. But is it?
What Is Dirty Keto?
Dirty keto is a lot like the keto diet but without much thought about the quality and nutrient density of food.
Those who follow these eating habits might consume fast food, cured meats, and sugar-free diet products, as long as it fits into their macronutrient ratios.
Since the goal of the regular keto diet is simply to get your body into a state of ketosis, the dirty keto approach can technically result in weight loss.
You can get into ketosis — a metabolic state wherein you’re burning fat for fuel instead of glucose — just by lowering your carb intake enough.
However, simply being in ketosis doesn’t mean you’re healthy.
Real, sustainable weight loss and health depends on where your food comes from and the nutrients you’re digesting and using.
According to the dirty keto commandments, as long as you stay under 20 grams of carbs per day, you can:
- Eat fast food all the time. Dirty keto dieters find it easier to stick to their macros if they don’t have to prep, cook, and clean up after all their meals and snacks. They believe it’s much more convenient to order keto fast food and continue eating their favorite drive-thru meals by simply making a few low-carb tweaks (like skipping the bun and switching to diet soda).
- Snack on pre-made, packaged foods over fresh, whole foods. This includes everything from low-carb snacks to keto-friendly frozen meals and protein bars. As long as it fits your macros, the ingredients aren’t important.
- Replace your favorite sugary drinks or high-carb foods with sugar-free versions. Dirty keto dieters don’t care about artificial sweeteners. Sugar-free chocolate, ice cream, protein bars, drinks, and more are considered OK as long as you make it under 20 grams of net carbs for the day.
But can you really eat this kind of junk food every day and still be healthy or even lose weight?
Dirty Keto and Weight Loss
By limiting your net carbs to less than 20 grams per day, you’ll get your body to start producing ketones, so you can burn fat for energy instead of sugar. This can lead to weight loss.
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Though this shortcut approach to losing weight may work, you won’t feel nearly as many of the positive health benefits a clean keto diet offers — things like mental clarity and better physical performance.
Many people lose weight on a dirty keto diet. But it’s not sustainable in the long term and, frankly, it makes the regular keto diet look bad.
5 Reasons to Avoid Dirty Keto
This dirty diet may seem like the easy answer to losing weight without giving up greasy fast food, sugar-free sodas, and candies.
But are these tradeoffs more important than your long-term health? Here’s what these eating habits really get you.
#1. Highly Processed Foods
Quick grab-and-go foods and snacks, including healthy-seeming protein bars, are much more likely to contain bad fats, sugar alcohols, and artificial ingredients.
Studies show eating highly processed foods increases your rate of:
- Food addiction[*][*]
- Chronic inflammation[*][*]
- Poor digestion and GI disorders[*]
- Asthma and allergy symptoms[*]
Many of these negative outcomes stem from sugary drinks and high-carb staples like hamburger buns, french fries, potato chips, ice cream, and cookies. However, studies have not shown whether eating fast food and processed snacks in a ketogenic state is any better for you. Likely not.
Consuming low-quality and ultra-processed foods often means you’re also getting harmful additives and hormones.
Added Hormones and Antibiotics
Growth hormones and antibiotics are often found in factory farmed beef, chicken, and pork products. Artificial hormones may make livestock bigger, and help cows produce more milk, but eating them may disrupt your body’s own hormones.
Antibiotics are given to animals in cramped quarters to prevent diseases and infections from spreading. Having too many antibiotics in your system increases antibiotic resistance, which makes antibiotics given to treat serious infections less effective.
The CDC says antibiotic resistance is one of the biggest public health challenges today. Each year at least 2 million people get antibiotic-resistant infections in the U.S. — and at least 23,000 people will die as a result of them[*].
Artificial sweeteners include aspartame, saccharin, sucralose, maltitol, lactitol, mannitol, sorbitol, xylitol, and generally anything labeled “sugar-free.”
Consuming these artificial sweeteners has been linked with cancer, weight gain, type 2 diabetes, and an imbalance in healthy gut bacteria (leaving you more prone to sick days)[*].
Sugar-free versions of high-carb foods may also raise blood sugar levels and blood pressure, increase anxiety, and cause GI upset like bloating, diarrhea, and cramping[*].
Less Healthy Oils
Unhealthy, processed, refined vegetable oils like soybean oil, canola oil, and corn oil extend the shelf life of packaged foods and make their consistency more palatable. Your take-out bacon cheeseburger or grilled chicken is probably also cooked in these oils.
These types of low-grade, cheap oils are considered bad fats on keto.
Harmful trans fats are found in foods such as:
- Packaged, processed snack foods like margarine, non-dairy coffee creamers, cookies, crackers, tortilla chips, shelf-stable frosting, and microwave popcorn
- Fast food meals like burgers, tacos, and fries
- Fried foods that are deep-fried in vegetable oils like donuts, french fries, and fried meats
- Frozen doughs like canned or pre-prepared biscuits, pizza crust, and cinnamon rolls
Soybean and corn, the most commonly used oils, are among the top GMO crops in the United States[*]. They cause inflammation (by being higher in omega-6s than omega-3s) and may even trigger allergic reactions in some[*].
Chronic, systemic inflammation has serious consequences if left unchecked and has been linked to:
- Autoimmune disorders
- Several types of cancer
- Type 2 diabetes
- Leaky gut syndrome
- Heart disease
- Liver disease
- Negative behavioral changes
- Anxiety and depression
- Neurodegenerative diseases like Alzheimer’s and Parkinson’s
Plus, when these fats oxidize (through heating), they create dangerous free radicals with the power to alter your DNA, change the ways your cells function, and even impact whether crucial cells live or die[*].
This may be why one team of researchers discovered that for every 10% increase in ultra-processed foods in the diet of their participants, there was a significant increase (greater than 10%) in the risk of overall cancer and breast cancer[*].
Scientists discovered that mice fed a diet high in soybean oil had higher rates of obesity and weight gain, and they also showed signs of insulin resistance and diabetes. But when the same mice were fed a high-fat diet rich in saturated fats from coconut oil, these negative side effects disappeared[*].
Harmful Preservatives and Other Additives
Companies hide these terrible ingredients in everything from their meat “seasoning” to the preservatives keeping your pickles, bacon, eggs, and salads looking fresh longer.
Check the ingredients label for these food additives:
- Modified food starch (from corn, rice, wheat, or potato)
- Propylene glycol
- Propyl gallate
- Potassium sorbate
- Polysorbate 80
- Natamycin (a mold inhibitor)
- Sodium metabisulfite
- Sodium benzoate
- Sodium phosphate
- Sodium nitrate and sodium nitrite
Then there’s monosodium glutamate (MSG), which enhances the flavors of less-than-fresh food and is virtually tasteless on its own.
More than 40 different ingredients contain the same chemical in MSG (processed free glutamic acid).
So even if you don’t see MSG on the label, you may find maltodextrin, sodium caseinate, autolyzed yeast, autolyzed vegetable protein, hydrolyzed vegetable protein, or yeast extract, just to name a few[*].
What’s wrong with using MSG to make things taste better?
Many people are sensitive to MSG and don’t realize it. This means you may experience headaches and migraines, flushing, sweating, numbness, chest pain, nausea, and even heart palpitations after eating[*].
What’s worse is that MSG has been shown to increase your appetite and make you hungry for more calories — definitely not what you need if weight loss is your goal.
The processed food industry uses food dyes to make unhealthy food look appealing.
Americans now consume five times more artificial food dyes than when they were first approved by the FDA in the early 1960s[*]. They’re in sliced cheese, pickles, sugar-free drinks and candies, sausages, and more.
Both the UK and the EU have taken actions to ban artificial food colorings since lab studies have connected these potential carcinogens with cancer, an increase in allergies, and hyperactivity in children[*][*].
Phthalates are a group of chemicals used in food handling and plastic food packaging. They can seep into the food they’re protecting or come in contact with.
The problem is, they’re hormone disruptors that may lead to cancer, type 2 diabetes, and fertility problems.
When 10,253 participants in one study were asked to recall what they ate and where their food came from in the previous 24 hours, phthalate levels were 35% higher in those who regularly ate out at restaurants and fast food joints[*].
All these chemicals are just the tip of the iceberg when it comes to eating out and picking up pre-made foods with long ingredients lists.
So even though you may be eating fewer than 20 grams of carbs, what you’re really giving your body is chemicals instead of nutrient-dense foods.
#2. Lacks Essential Micronutrients
Don’t ignore your micronutrients while your macros are getting all the attention.
Vitamins, antioxidants, and minerals from whole food sources are essential for your body to function at its best.
Micronutrients, which are found in meat, veggies, fruit, nuts, and seeds, are vital and do important things for your body such as:
- Strengthen your immune system[*]
- Aid in normal cell functioning and maintenance[*]
- Help your hair, skin, and nails glow[*]
- Boost your energy levels (B vitamins especially)
- Protect your cells from environmental damage[*]
Though you’ll need to cut out many fruits and vegetables when you switch to a keto diet, you’ll get even fewer micronutrients on dirty keto.
Eating meat and cheese alone will make you deficient in certain vitamins you can only get naturally from fruits and veggies.
That’s why regular keto dieters eat a wide variety of nutrient-rich keto foods — or make it a point to supplement with the right micronutrients to meet their intake.
Since fast food and grab-and-go options don’t have all the vitamins and minerals you need, you may also get sidelined with the keto flu.
#3. Potential for Never-Ending Keto Flu
The keto flu is a temporary side effect of getting into ketosis. Most people just starting out on a keto diet experience a few weeks of fatigue and other issues, then transition into full ketosis.
These symptoms are a result of your body adjusting to a different ratio of macronutrients (more fat and protein, fewer carbs).
As your body depletes all the glycogen (stored glucose) you’ve been accumulating on a high-carb diet, you start to lose water quickly. This is because each gram of glycogen is stored alongside 2–3 grams of water.
As your cells flush glycogen, they also lose water and electrolytes. And this can result in dehydration and electrolyte imbalances.
Symptoms of Electrolyte Imbalance
Without the right balance of fluids and electrolytes like sodium, magnesium, calcium, and potassium, symptoms of an electrolyte deficiency may appear, such as[*]:
- Heart palpitations or a racing heart
- Feeling shaky, dizzy, or weak like you’re going to pass out
- Headaches or migraines
- Muscles cramps
- Constipation and bloating
When you combine the normal effects of the keto transition with imbalanced electrolytes, you may wind up with a collection of flu-like symptoms known as the keto flu.
Symptoms of Keto Flu
Until you balance your electrolytes again and finally reach ketosis, you may feel symptoms of the keto flu such as:
- Brain fog
- Dizziness or confusion
- Stomach pain
- Diarrhea or constipation
- Muscle cramping or soreness
- Lack of concentration or focus
- Trouble falling or staying asleep
- Sugar cravings
- Heart palpitations
Both the keto flu and an electrolyte imbalance are temporary issues which will lessen (and even go away) when you become fat-adapted and properly hydrated (with water and electrolytes).
But if you’re following dirty keto, it may take you much longer to get over the keto flu — if you ever do.
Processed ingredients cause your body to become dehydrated more quickly, especially if you’re drinking diet sodas instead of water to rehydrate. The lack of micronutrients on a dirty keto diet may also make electrolyte imbalances even worse.
Another side effect of dirty keto that’ll make you feel worse is the GI discomfort.
#4. Lacks Fiber
The only rule about carbs on dirty keto is you must stay under 20 grams each day. But there are no rules about where those carbs come from.
If you “save up” all your carbs for the day for a beer or a few bites of bread, you’re still technically under your carb limit. But your health will suffer.
Instead, if you eat 20 grams worth of low-carb, high-fiber vegetables, you’ll experience all sorts of benefits.
Low-carb dietary fiber is your friend on a classic keto diet because it helps your body:
- Bulk up your stool and move digestion along
- Feed good bacteria in your gut[*]
- Improve insulin sensitivity[*]
- Control appetite by keeping you full longer[*]
- Reduce risks of cancer and heart disease[*]
Everyone should eat more fiber, but most people aren’t hitting their daily 25-34 grams of fiber goals[*].
And this is much harder to do on low-carb diets like keto[*].
Since high-fiber carbs like beans, whole grains, apples, and veggies are off limits — and there’s zero fiber in animal sources like meat and cheese — you actually have to make an effort to reach your recommended fiber intake.
Best Sources of Low-Carb Fiber
The best sources of low-carb fiber on keto include whole, unprocessed foods like:
- Seeds: chia seeds, hemp seeds, and pumpkin seeds
- Berries: blueberries, blackberries, and raspberries
- Nuts: almonds, hazelnuts, pecans, and pistachios
- Vegetables: broccoli, cauliflower, brussels sprouts, and spinach
Healthy carbs on keto are rarely found in the drive-thru.
Even though you can snack on packages of nuts and seeds, you’ll need to avoid those containing harmful ingredients like ultra-refined oils used for roasting or preservatives to extend shelf-life.
All this worrying about lengthy ingredient labels, constantly feeling under the weather, and unpredictable bowel movements may cause you to throw in the towel and abandon the dirty keto life.
#5. Less Sustainable
Dirty keto is a temporary fix if you’re traveling or unable to cook for yourself in the short term. However, it’s not a good strategy for better health and weight loss in the long run. Here are just a few reasons why:
- Dirty keto doesn’t create a true lifestyle change, especially if you can blame fast food restaurants and junk food for your initial weight gain. Tweaking your favorite orders or buying sugar-free versions of your high-carb go-tos won’t teach you how to live without them.
- It gets expensive fast. The average American spends over $3,000 a year dining out[*]. Since a typical $15 restaurant meal can usually be made at home for just $5, you’re going to be wasting more money to eat lower-quality ingredients[*].
- You’re more likely to fall off the wagon. It may sound like a dream to never have to cook or clean up the dishes again, and you may be legitimately excited to eat out at your favorite guilty pleasure drive-thrus on keto. But this novelty will wear off. And without practicing clean keto eating you’re more likely to revert back to your old habits and gain the weight you lost right back.
- You’re not going to feel good, and if you don’t feel energized and lose weight, you’re not going to continue down the low-carb path.
Since you want a diet that promises — and delivers — those results, here’s how to make a clean keto diet work for you.
Better Options to Dirty Keto
A nutrient-dense, healthy keto diet doesn’t have to be complex or time consuming. There are just a few tenants of a healthy keto diet.
A clean ketogenic diet includes plenty of[*]:
- Organic and grass-fed meats and protein, including beef, poultry, pork, game meat, and organ meat
- Wild-caught, sustainably sourced, fatty fish like salmon and tuna
- High-quality, full-fat dairy free of antibiotics
- Healthy fats from coconut oil, avocado, olive oil, grass-fed butter, and MCT oil
- Low-carb vegetables like broccoli, cauliflower, Brussels sprouts, and leafy greens
- Low-sugar fruits such as blueberries and raspberries
- Keto coffee and keto matcha lattes
Don’t think the keto diet is sustainable with your busy lifestyle?
Use these tips below to make clean keto an easy diet to manage.
#1. Begin a Transition to Clean Keto Using Keto Cycling
If a classic keto diet feels too difficult or restrictive for you right off the bat, you can ease into one using keto cycling.
With this plan, you’ll eat clean keto for five or six days of the week and then have one or two “cheat days” where you’ll have a higher carbohydrate intake.
This may lessen some of the initial pressure of buying, prepping, cooking, and cleaning up every single day of your new healthy life. Just commit to getting back on the keto bandwagon after your scheduled cheat day.
The downside to this yo-yo keto approach is you may never truly get into ketosis, which means weight loss, appetite suppression, higher energy levels, and all the other health benefits of a keto diet may not come as quickly.
#2. Learn a Few Easy Keto Recipes
You don’t need a lot of time, money, or experience to make some of the tastiest, healthiest keto meals and snacks.
You just need to stick to the approved keto foods list.
It’s also essential to understand which foods you should avoid in order to stay in ketosis, and that includes many packaged, processed foods, and those with hidden carbs.
Fill your grocery cart with good keto foods you already enjoy eating.
Then use these keto recipes to kickstart your new low-carb lifestyle without the drive-thru:
- The Best Keto Weight Loss Meal Plan for Beginners
- 25 Easy Keto Meals: How to Keep It Simple on the Keto Diet
- Easy Keto Recipes for When You’re Short on Time
- Delicious Low-Carb Casseroles That Make Keto Easier
Once you make a few of these recipes and beef up your cooking skills, it will be easier and faster to fit meal prep into your hectic schedule. Bonus: You’ll also save money and always have fresh keto food around.
#3. Try a Keto Meal Service
Most people don’t have the luxury of consulting with a dietitian or nutritionist, much less hiring a private chef to cook all their healthy keto meals. Meal delivery services can do some of the meal planning for you and make fueling your low-carb life a lot simpler.
While some of the most popular meal delivery services now have keto and low-carb menu options, other new companies are devoted entirely to keto dieters.
Choose which recipes you want to be shipped to your home and all the ingredients and instructions to make said meal will show up at your door. You won’t have to think about measuring or buying your food, and you’ll still be eating quality ingredients.
#4. Find Healthy, Convenient Food Options
What if you could replace the quick foods and snacks on the dirty version of the keto diet with healthier options just as convenient?
Products 100% free of sugars, cheap fillers, and additives can help ease your transition from fast food to healthy keto food, such as:
- Nut butter featuring healthy fats from macadamia nuts, cashews, and MCT oil is a must-have. A spoon of this will crush cravings and give you a jolt of energy — minus the bad stuff found in standard nut butters.
- Instant keto coffee with MCT oil is the best way to give your caffeine routine a keto upgrade. This high-quality swap also makes intermittent fasting easier.
- Keto bars are the perfect companion for on-the-go keto dieters. One bar has 19 grams of fat, 10 grams of collagen protein, and just 3 grams of net carbs. These real food ingredients will keep you away from junk food.
- Keto micronutrient powder packs pure, plant-sourced nutrition from 26 different fruits and veggies so you’re not missing out on essential vitamins and minerals. Just toss it in a blender with collagen protein or keto whey protein for a quick, delicious smoothie you can make in less than five minutes and take with you.
The Bottom Line on Dirty Keto
Add these options to your diet of whole, unprocessed food sources and you’ll never worry about questionable ingredients kicking you out of ketosis.
While dirty keto may be tasty for a while, it’s neither healthy nor sustainable.
A clean keto approach using real, healthy foods will support your body through deep nutrition, give you higher energy levels, and lead to greater weight loss.
Start a ketogenic diet the right way with this keto kickstart guide, which makes it easy for anyone to reap the benefits of a healthier lifestyle.