I Tried the Ketogenic Diet for 30 Days, and Here's What Happened (2024)

As a rule, I shy away from extreme diets or eating regimens. Atkins? Never heard of them. Whole30 diet? Wholly not going to bother with it. The Paleo plan? Some things are better left in the history books.

However, the simplicity of the ketogenic—keto for short—diet plan appealed to me, and I was looking to lose some weight ahead of a wedding I was attending.

Find out what happened when I decided to limit carbs for 30 days, including how I did it, my successes, challenges and results, and my lifelong takeaways about keto weight loss.

Read More: Ketogenic Diet 101: A Beginner's Guide

How I Did the Keto Diet Plan

Four things that really helped me get started were:

  • a goal
  • a plan
  • focusing on carbs only
  • having a friend for accountability

I started the keto diet about one month before the wedding to try to lose 10 pounds. Since a low-calorie diet can produce a 1- to 2-pound weight loss per week, 10 pounds over four weeks didn't feel extreme. If the keto diet plan was as great as had been touted, I thought 10 pounds would be easy.

Before I started, I spent several weeks researching the diet, following keto-focused Instagram accounts for inspiration, and creating a plan. I soon learned this last part was the most important thing for my journey.

I used an online keto calculator to set a goal for calories, carbs and fat. I mostly followed the suggestions, except for fat. The calculator suggested over 200 grams of fat each day. That's tough to hit without loading ghee into my coffee or swigging some coconut oil before lunch. Can it be done? Absolutely. I just couldn't get there. For me, the focus was on reducing carbs. I let the other pieces just fall into place.

I also asked a friend to join me as an accountability partner. She had tried the keto diet before with success, so having a guide for my myriad questions was a big help. It also helped keep me on track.

My Biggest Challenges on the Keto Diet Plan

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Eating Only 20 Grams of Carbs a Day Is Hard

The keto diet plan is a high-fat and low-carb (HFLC) diet. Although, I dare say that it's extremely low-carb—you're "allowed" to eat just 20 grams in a day, which is super low. Some people on keto follow a net-carb plan—you can subtract the grams of fiber from a food's total carbs—which allows you to eat more carbs in a day. For my 30-day diet and the sake of simplicity, I stuck with total carbs.

As a rule, I aimed for 20 g each day—2 at breakfast, 5 at lunch, 3 for snacks and 10 for dinner. I found that if I aimed for 20, I'd land under 30. That was successful enough for me.

The key to hitting my number was to plan, plan, plan. I planned out all three meals, condiments and snacks on the weekends for the next week. If I knew what I was having ahead of time, I found managing the infrequent cravings and hunger pangs easier. I can't stress enough the importance of planning for a keto diet.

The Food Is Repetitive

I ate a lot of bacon, cheese, eggs and meat—mostly steak and chicken. For a person whose eating philosophy is typically more plant-based and whole-food-focused, eating processed pork products every morning was definitely a big change.

This Can Be a Very Low-Calorie Diet

Keeping your carb count near 20 g reduces your calorie consumption too. Carb-focused foods can contribute a large share of calories mainly because we eat a lot of them. If you cut way down on carbs, you dramatically reduce calorie intake.

30 Healthy Low-Carb Foods to Eat

You would think with all that fat and protein that it would be easy to overdo it on calories. But some days, I struggled to get over 1,200 calories. Despite my goal of 1,800 calories, I fell short almost every day. That's enough of a calorie deficit to produce weight loss, even without the low-carb count.

I Came Down with 'Keto Flu'

The "keto flu" is a term you'll see on keto blogs and forums. It was a real event for me, but not everyone will experience it.

As your body starts to rely on ketones from the fat you're burning instead of glucose from carbohydrates, you may experience fatigue, mental fogginess and even irritability. My "keto flu" only lasted a day, and I never experienced the symptoms again once I passed it.

What Happens to Your Body When You're on the Keto Diet

My Biggest Successes on the Keto Diet Plan

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I Beat My Weight Loss Goal

While I set out to lose 10 pounds, I quickly surpassed my goal. I lost 10 pounds within three weeks and hit 15 pounds two days before the wedding.

It's important to remember that when you are on a low-carb diet of any type, you will lose several pounds in the first few days. That's because your body is dropping water weight. When I returned to typical eating over the wedding weekend, I gained 4 pounds because when I started eating carbs again the water weight returned.

I Had More Energy—but Not Every Day

While on the keto diet, I had a lot of energy, and I didn't experience the typical mid-afternoon energy slumps. With that said, gym time was a bit of a challenge. Without carbs, your body has to burn fat for energy, which some days will leave you feeling drained during a workout because your body has to work harder to release the fat so it can be used for energy. That's OK. Stick with it, and try again tomorrow.

I Learned to Be Very Creative in the Kitchen

Eating at a restaurant and keeping your keto status is almost impossible—and after asking the server to hold the onions from your chicken fajitas for the third time, you'll never want to go into a restaurant again. Luckily, I consider myself an adventurous cook and love trying new recipes.

Of course, with a keto plan, your ingredient list is dramatically shortened. I scoured blogs, Instagram, Pinterest and other sources for reliable recipes, then put my thinking cap on and came up with several dishes I really enjoyed.

Write the recipes down, use a meal-tracking app like MyFitnessPal to record the ingredients and determine if a recipe works for you. It takes a bit more work than an average meal plan, but it's worth it.

I Eat Less Sugar Now

You can't eat sugar on the keto diet, and most of the no-carb sugar substitutes don't work for me.

This isn't to say that my cravings simply went away. In the first few days, cravings for a peanut butter cup, soda or even just a banana were strong. Here's when having an accountability buddy really helps. When you go back to typical eating, you might find, as I did, that many foods you ate regularly are now just too sweet to finish.

Read More: I Gave up Sugar for 30 Days—Here's What Happened

Lifelong Takeaways from My 30 Days on the Keto Diet Plan

I won't be staying on a keto diet meal plan for the long term—I can't eat that much bacon to keep it up—but I expect I'll return to it several times a year. If nothing else, my monthlong experiment helped me eat less sugar and refined carbs.

It's important that you check with your health care practitioner before trying this diet, as the keto diet is not for everyone. Certainly, there are plenty of people who should not try this diet, including if you're pregnant or breastfeeding, and those with blood sugar issues, heart disease and liver disease, among other conditions.

With that said, if you're in good health and are looking for a weight loss jump-start, the keto diet might be the opportunity you've been looking for. I just hope you really like bacon.

Read More: 7 Things I Wish I Knew Before Starting the Keto Diet

I Tried the Ketogenic Diet for 30 Days, and Here's What Happened (2024)

FAQs

How much weight can you lose in 30 days on keto? ›

How Much Weight Can You Lose in a Month on Keto? Individuals on a keto diet can lose an average of 10-12 pounds in their first month if they stay consistent with the diet and maintain a calorie deficit. However, weight loss can vary depending on starting weight, age, and activity level.

How long does it take to feel the effects of a ketogenic diet? ›

While the length of time it takes to adapt to a keto diet varies, the process begins after the first few days. Then, after about a week to 10 days, many low-carbers suddenly start to feel the positive effects of keto-adaptation. They report improved mental concentration and focus and more physical energy as well.

How much weight can you lose in 1 week on keto? ›

1 Week. The great news is, you'll start to see the weight drop off straight away - in the first week of going Keto. Anywhere between 2-10lbs of weight loss can be expected after 1 week. This is an incredible amount, however it isn't due to losing fat, but rather water!

How much weight can you lose on keto in 2 months? ›

“If the patient can maintain a steady calorie deficit, I expect them to lose one to two pounds per week,” says Dr. Seeman. So after 12 weeks, her clients are usually down around 20-25 pounds. She adds, however, that this is very patient-specific and would depend on their initial body fat percentage.

What happens if I eat no carbs for a month? ›

Severe carb limits can cause your body to break down fat into ketones for energy. This is called ketosis. Ketosis can cause side effects such as bad breath, headache, fatigue and weakness.

How to speed up weight loss in ketosis? ›

To maximize weight loss on a ketogenic diet, get adequate sleep, reduce stress, be more active and consume whole, nutritious, low-carb foods whenever possible.

What color is urine when in ketosis? ›

Any color on the ketone strip, from pink to purple, indicates fat burning (ketosis). Some people get a darker ketone strip color and achieve the same weight loss results as someone with a lighter color. Your “positive” color result can vary throughout the day for many reasons.

What happens to your body when you first start keto? ›

People often report brain fog, tiredness, and feeling sick when starting a very low carb diet. This is termed the “low carb flu” or “keto flu” (16). However, long-term keto dieters often report increased focus and energy.

How do you know your body is in ketosis? ›

People in ketosis may experience a variety of side effects and symptoms, including headaches, stomach upset, and changes to their sleep and energy levels. For a more accurate way of determining ketosis, people can check the levels of ketones in their blood, breath, or urine.

What is the 30 30 30 rule for weight loss? ›

The 30-30-30 rule involves eating 30 grams of protein within 30 minutes of waking up, followed by 30 minutes of low-intensity, steady state cardiovascular exercise. Beyond these steps, the 30-30-30 method doesn't require any changes to other meals or behaviors, restrictions or counting calories.

How much water should I drink on keto? ›

Rule of thumb states a person should divide their body weight in half and drink that many ounces of water daily. For example, if someone weighs 160 pounds, they'll need to take in 80 ounces of water a day. That amount could be more for someone on keto, since the diet alters your body's water and electrolyte levels.

Can you lose 10 pounds in 2 weeks on keto? ›

If a person follows the 75% fat /20% carb/5% fat keto diet, average results may look like this: Weeks 1–2: rapid weight reduction phase due to water loss – up to ten pounds. Weeks 2–4: standard weight reduction – between one and two pounds per week. After the first month – slow weight loss – around one pound per week.

Can you lose 20 pounds in a month? ›

Losing 20 pounds in 1 month may be easier than 2 weeks, but it's still unrealistic for most people. Once again, it comes down to your TDEE and simple math. To lose 20 pounds in 1 month, you'd need to create an average deficit of 2,500 calories per day for 4 weeks.

Can you lose 15 pounds in a month on keto? ›

It's been found that most weight loss occurs in the early stages of a ketogenic diet and that those who are on the ketogenic diet for a more extended period of time (12 weeks to 12 months), don't experience major weight loss changes. On average, people: Lost 15 lbs in body weight after 4 weeks, and.

How long can you stay in ketosis safely? ›

Gulotta recommends staying on keto for six months max before reintroducing more carbs to your diet. And Scott Keatley, RDN, of Keatley Medical Nutrition Therapy in New York City, agrees: “The science hasn't gotten to the point where I would be comfortable recommending it as a forever diet,” he says.

What foods can I eat unlimited on keto? ›

Foods you can eat on the keto diet include fish and seafood, meat and poultry, non-starchy vegetables like bell peppers, broccoli, and zucchini, avocados, berries, nuts and seeds, eggs, high-fat dairy products, olive oil and other oils, and high-cocoa chocolate.

Can you eat salad on keto? ›

You can eat a variety of salads on keto, as long as they contain healthy fats and proteins and are low in carbs. Egg salad, grilled chicken salad, shrimp salad, cauliflower salad, arugula salad, cucumber salad, antipasto salad, Greek salad, Caprese salad, and spinach salad are just a few keto-friendly salads to enjoy.

What are big mistakes on keto? ›

Not watching your carb intake - Sugar and refined carbs are in many foods. You should be aiming to eliminate these from your keto diet. “Try to keep your net carb content under 20 grams/day or total carbs under 30 grams,” Dr Riggs says. Keep close track of your sugar and carb intake by reading nutrition labels.

What is the number one worst carb? ›

1. Sugary Foods. Most people already think of many of the foods in this category as unhealthy treats. Candy, soft drinks, and sweet desserts such as cake, chocolate, and ice cream are all expected entries on a list of carbs to avoid to lose weight.

How to flush carbs out of your body fast? ›

Start by drinking more water and increasing your fiber intake (try eating more non-starchy vegetables or taking a fiber supplement). Ginger, peppermint and licorice – either fresh or in tea form – can also help to get things moving, as can taking magnesium, probiotics or digestive enzymes.

Can I lose 30 pounds in 3 months on keto? ›

“I was amazed at how quickly my body changed.” “I was low carb/low sugar for about a year and lost 45 pounds,” she says. “I've been keto for the last 9 months. I lost 30 pounds in about 3 months after starting real keto.

How long to lose 50 pounds on keto? ›

Most doctors would agree that losing about one to two pounds per week is sustainable and healthy. That would put you around the 50-pound mark halfway through your first year of the keto diet.

How long to lose 40 pounds on keto? ›

With a rate of weight loss of 1-2 pounds each week, about 5-6 months is how long to lose 40 pounds on keto. There are other diets to help you lose 40 pounds fast. But, most of them aren't sustainable for the long term.

How long to lose 14 pounds on keto? ›

However, on average, it is safe to aim for a weight loss of 1-2 pounds per week on a ketogenic diet. This means that to lose 15 pounds, it could take anywhere from 7-15 weeks. It's important to note that quick weight loss is not sustainable and can lead to health complications.

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