When most people think about managing an autoimmune disease, they think about reducing inflammation.
That’s understandable—after all, inflammation is what drives many of the symptoms we experience, from joint pain and stiffness to fatigue.
But there’s another piece of the puzzle that often gets overlooked: maintaining muscle.

Muscle isn’t just about strength or appearance. It’s one of the body’s most metabolically active tissues, playing an important role in blood sugar regulation, mobility, balance, healthy aging, and even how well we recover from illness. For people living with autoimmune disease, preserving muscle can become even more important, especially when chronic inflammation, fatigue, or prolonged inactivity make it difficult to stay active. That’s one reason creatine has become a topic of growing interest. Once thought of as a supplement only for athletes and bodybuilders, creatine is now being studied for its potential role in healthy aging, cognitive health, and preserving muscle throughout life.
So, should someone with an autoimmune disease consider taking it?
Like many questions in medicine, the answer depends on the individual. But the conversation is certainly worth having.

Why Muscle Matters More Than You Think

One of the biggest misconceptions about autoimmune disease is that treatment begins and ends with calming the immune system.
While reducing inflammation is essential, our long-term health depends on much more than our immune cells alone. The health of our muscles, bones, metabolism, gut, and nervous system all influence how resilient we are over time.
Unfortunately, autoimmune diseases can make maintaining muscle surprisingly difficult.

Persistent inflammation increases the body’s demand for energy and can accelerate the breakdown of muscle tissue. Joint pain often limits physical activity. Fatigue makes exercise feel impossible on some days. Even medications like corticosteroids, while sometimes necessary, can contribute to muscle loss when used for extended periods.

Over months or years, this can create a cycle that’s difficult to escape. Less movement leads to weaker muscles, weaker muscles make movement harder, and physical function gradually declines. That’s why one of my goals for patients isn’t simply reducing inflammation—it’s helping them maintain the
strength and capacity to live the life they want.

What Exactly Is Creatine?

Creatine is a naturally occurring compound that your body makes from amino acids. You also get small amounts from foods like fish and red meat.
Inside your muscles, creatine helps regenerate ATP, the molecule your cells use for quick bursts of energy. Whether you’re lifting weights, climbing stairs, carrying groceries, or simply getting up from the floor, your muscles rely on this energy system every day.

Supplementing with creatine increases the amount stored in your muscles, allowing them to perform repeated efforts more efficiently and recover more effectively from resistance training. That’s why it’s remained one of the most extensively researched sports supplements for decades. But today, researchers are looking beyond athletic performance. Increasingly, the conversation is about preserving muscle as we age—not just building it.

An Integrative Perspective

In integrative medicine, we often ask a simple question:
What helps the body become more resilient?
Rather than chasing a single supplement or searching for one “root cause,” we look at how different pieces of health work together.
Movement reduces inflammation.
Strength training improves insulin sensitivity.
Better metabolic health supports immune regulation.
Quality sleep improves recovery.
Good nutrition provides the building blocks for repair.
Creatine doesn’t replace any of these foundations. But it may help support one of them: maintaining healthy muscle.
If taking creatine allows someone to recover better from exercise, feel stronger during resistance training, or remain physically active despite living with a chronic illness, then it may have value—not because it’s a miracle supplement, but because it supports habits that improve long-term health.

What Does the Research Say?

Research specifically involving autoimmune diseases is still relatively limited, but studies in healthy adults and older individuals consistently show that creatine can improve strength, increase lean muscle mass, and enhance exercise performance when combined with resistance training.
That’s an important point.
Creatine doesn’t build muscle by itself.
It works best when paired with regular movement, particularly strength training.
For someone living with rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, or another autoimmune condition, maintaining muscle isn’t just about fitness. Stronger muscles help support joints, improve balance, reduce frailty, and make everyday activities easier.
While creatine isn’t a treatment for autoimmune disease itself, helping patients stay active may indirectly support many aspects of their overall health.

Is Creatine Safe?

This is probably the most common question I hear.
One concern that’s circulated for years is whether creatine harms the kidneys.
Fortunately, decades of research in healthy individuals have found no evidence that recommended doses of creatine damage normal kidney function.
The confusion often comes from routine blood work.
Creatine supplementation can slightly increase blood creatinine levels. Because creatinine is commonly used as a marker of kidney function, this change can appear concerning if the full clinical picture isn’t considered. In many cases, however, the elevated number reflects increased creatine metabolism—not kidney injury.
That said, this doesn’t mean creatine is appropriate for everyone.
Individuals with significant kidney disease, lupus nephritis, or other medical conditions affecting kidney function should always discuss supplementation with their physician before starting.
As with any supplement, quality matters. Choosing products that undergo independent third-party testing
helps ensure you’re getting what’s listed on the label without unnecessary contaminants.

Looking Beyond the Supplement

One thing I encourage patients to remember is that supplements are exactly what their name suggests—they supplement an already healthy foundation.
If someone is sleeping five hours a night, eating mostly ultra-processed foods, rarely exercising, and living under constant stress, creatine is unlikely to make a meaningful difference. On the other hand, someone who prioritizes whole foods, strength training, restorative sleep, and stress management may find that creatine helps support those healthy habits.
This is one of the principles of lifestyle medicine: interventions work together.
Nutrition influences exercise.
Exercise improves sleep.
Sleep affects immune regulation.
Metabolic health shapes inflammation.
The goal isn’t finding one magic solution. It’s creating an environment where the body has the greatest opportunity to heal and function well.

Should You Take Creatine?

For many people with autoimmune disease, creatine may be a reasonable addition to a healthy lifestyle— especially if preserving muscle strength and maintaining physical function are priorities.
But it shouldn’t be viewed as another supplement to collect or another shortcut to better health.
Instead, ask yourself a different question.
Am I doing the foundational things that help my body become more resilient?
If the answer is yes, creatine may be one tool that helps you build on that foundation.
If the answer is no, your time and energy are probably better spent improving sleep, moving your body consistently, eating nutrient-dense foods, managing stress, and addressing environmental factors that may be contributing to inflammation.
Those habits will almost always have the greatest impact.
At the end of the day, our goal isn’t simply to suppress autoimmune disease. It’s to build a healthier, stronger, more resilient body—one that’s better equipped to support healing for years to come.