Franziska Spritzler, RD, CDEAs a dietitian, there’s a phrase I hear all too frequently from people, including fellow healthcare professionals: “Keto isn’t sustainable.” And I understand why they have that impression. Many people still see it as a short-term fix or an overly restrictive approach, while clinicians may associate it with strict therapeutic versions like the classic 4:1 ketogenic diet used for epilepsy.
But I have a different point of view. I’ve been following a ketogenic lifestyle for nearly 15 years, and I’ve supported many others in doing the same. When approached in a flexible, personalized way, keto absolutely can be sustainable.
In fact, I recently shared a case report from a man who has followed a ketogenic approach for almost 20 years. His experience shows that keto can be a long-term strategy for maintaining health and vitality.
Over the years, I’ve learned a lot, both through living this lifestyle myself and from working with others. Here are some of the key tips for making keto sustainable over time.
Eat Foods You Enjoy
Liking the food you eat makes long-term sustainability far more likely. If your meals are bland, repetitive, or don’t leave you feeling satisfied, it becomes much harder to stay committed over time.
It’s important to understand that there’s no one “right” way to eat keto. The most successful long-term approach is to eat meals that contain foods you genuinely enjoy and that align with your health goals, preferences, and lifestyle.
Some people prefer whole-food meals like meat, seafood, cheese, or eggs paired with non-starchy vegetables cooked in natural fats such as butter or olive oil. Plain whole milk Greek yogurt topped with chopped nuts or seeds can also make an easy breakfast or snack. This has been my personal approach since 2011. Others follow a similar framework but choose to avoid foods like dairy, eggs, nuts, or seafood based on individual tolerance or preference.
I’ve also seen people thrive on a more plant-based version of keto, focusing on protein sources like tempeh, tofu, nuts, and seeds; low-carb vegetables; and coconut, olive, and other minimally processed plant oils. Ensuring that essential nutrition needs are met can help make a plant-focused ketogenic lifestyle truly sustainable.
Carnivore or animal-based versions of keto are another long-term option for those who feel best eating primarily meat, fish, eggs, and animal fats, with little to no plant foods. Prioritizing nutrient density and adequate fat intake – from sources like fatty cuts of meat, egg yolks, lard, and tallow – is key to making this approach sustainable and supportive of overall health.
There’s also room for a bit of sweetness, whether that’s a keto-friendly dessert or a small serving of berries for those who prefer to avoid alternative sweeteners.
No matter your eating style, long-term success with keto comes from creating a way of eating that is:
- Enjoyable and satisfying
- Nourishing
- Aligned with your health goals and personal preferences
Understand How Keto Supports Your Health
You don’t need to know all the science behind keto to follow it successfully. But having a basic understanding of why it works can help you stay committed for the long term.
After you significantly reduce your carbohydrate intake, you enter a metabolic state known as ketosis, where the body begins to burn fat for fuel instead of glucose. During this process, the liver produces ketones, which can provide a steady, efficient source of energy for the brain and body. Ketosis has been shown to lower insulin levels, improve metabolic flexibility, reduce oxidative stress, and enhance mitochondrial function(1) – all of which may contribute to better energy levels, focus, and metabolic health.
When you understand that lowering carbs and staying in ketosis can potentially provide a number of benefits – such as supporting fat loss(2), reversing type 2 diabetes(3), and improving mental health(4) – it becomes easier to stay focused, especially when faced with tempting foods or other situations that might pull you off course.
Make It Easy to Stick With
Success over the long term has much more to do with preparation and structure than willpower. I don’t leave meals up to chance, especially dinners on busy days. I’ve built routines that make keto my default, not something I have to work hard to maintain.
Here are some strategies that have helped me and many others stick with keto long term:
- Batch-cook proteins and vegetables ahead of time for easy meals that can be put together in minutes.
- Keep frozen or pantry staples like riced cauliflower, canned salmon, and olives on hand at all times.
- Repeat simple meals that don’t require much decision-making: protein + vegetables + fat.
- If you enjoy cooking more elaborate meals, consider creating a collection of keto-friendly favorites from the thousands available online – including the hundreds of recipes on our website.
- Check restaurant menus in advance and call ahead to ask about substitutions if needed.
- For meals at someone’s home, find out about the menu beforehand and offer to bring a keto-friendly dish if appropriate.
- Pack snacks (nuts, meat sticks, cheese, etc.) when traveling or out for the day.
Be Flexible, Not Perfect
One of the biggest challenges to making keto sustainable is the pressure to do it perfectly or not at all. That all-or-nothing mindset can cause people to give up after a single slip, even though it doesn’t erase their progress or determine long-term success.
I’ve seen many people occasionally go off track, whether due to travel, stress, or simply life happening. In some cases, they’ve chosen to eat more carbs intentionally for a special occasion after being fully keto-adapted for several months. And it’s clear that what matters most is how you respond afterward. Getting back to your routine, reflecting on how you felt after the experience, and moving forward is what truly makes the difference.
One off-plan meal – or even a few days of higher-carb eating – doesn’t mean keto isn’t sustainable. It just means you’re human. What makes this lifestyle sustainable isn’t being “perfect” all the time, but knowing what helps you feel your best and having the confidence to return to it when you’re ready.
Build a Support System
Keto can sometimes feel isolating, especially if the people around you don’t fully understand or support your choices. But connection matters. Having a support system can make a big difference in how sustainable this lifestyle feels over time.
That support might come from a friend, healthcare provider, or online group of people on a similar health journey. For many, it’s that sense of shared experience that turns keto from something they’re trying into something they truly live.
And if you’re ever unsure about your approach or feel like something isn’t working, getting input from others – especially those who understand both the science and the day-to-day reality of keto – can help you stay motivated and committed.
If you’re looking for that kind of connection, our online community is a space where people support one another through all phases of the journey. It’s a space to stay grounded, encouraged, and reminded that you’re not doing this alone.
The Case for Keto as a Sustainable Lifestyle
The idea that keto is too extreme or restrictive to maintain doesn’t reflect the lived experiences of many people, myself included. A ketogenic lifestyle can be sustainable when it’s based on real food, personalized to your needs, and realistic for daily life. With the right structure, support, and mindset, keto becomes less about strict rules and more about consistency, satisfaction, and trust in what works for your body. Over time, it simply becomes the way you live.
REFERENCES
- Ketogenic diet for human diseases: the underlying mechanisms and potential for clinical implementations, Nature, 2022
- The impact of a ketogenic diet on weight loss, metabolism, body composition and quality of life, iScience, 2024
- Long-Term Effects of a Novel Continuous Remote Care Intervention Including Nutritional Ketosis for the Management of Type 2 Diabetes: A 2-Year Non-randomized Clinical Trial, Frontiers in Endocrinology, 2019
- Efficacy of low carbohydrate and ketogenic diets in treating mood and anxiety disorders: systematic review and implications for clinical practice, British Journal of Psychiatry Open, 2023
