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The Creatine Gap for Plant-Based Eaters: Why removing animal foods can change more than your protein intake

Amira Lamb
5 days ago
6 min read

Colorful vegan grain bowl with avocado, chickpeas, cherry tomatoes, lettuce, sweet potato, cabbage, and radish on wood table

I just finished the Dormition Fast, which means I’ve had plant-based eating on my mind in a very practical way.

In the Orthodox Church, fasting seasons usually mean stepping away from meat, dairy, and eggs. Often fish too. The Dormition Fast is one of those seasons. Research on Orthodox fasting describes the Assumption/Dormition Fast as a period where fasters abstain from meat, dairy, and eggs, and usually fish as well, with some tradition-specific allowances.

Through Faithful Fasting, my free online program for Orthodox Christians, I’ve been helping people approach fasting seasons with more steadiness, nourishment, and common sense.

Not because fasting needs to become a wellness project.

It doesn’t.

But because removing animal foods changes more than your dinner options. It changes the nutrients you’re getting on a regular basis. And creatine is one of the big ones most people never think about.

This is not only relevant for Orthodox Christians.

It matters for vegans. Vegetarians. Mostly plant-based eaters. People who eat very little red meat. People who go through seasons where they eat less animal food. And anyone who feels a little flat, foggy, or underpowered when animal foods come out of the picture.

That is the creatine gap.

And it is worth understanding.

What creatine actually is

Creatine is a compound your body makes from amino acids. Your liver, kidneys, and pancreas make it naturally. Most of it is stored in your muscles, with smaller amounts in your brain. You also get creatine from food, mostly red meat and seafood.

Its main job is energy support.

Not caffeine energy.

Not “I cleaned my whole apartment at midnight” energy.

Creatine helps your body quickly recycle ATP, which is your body’s immediate energy currency. This matters most during short, intense efforts.

Think lifting. Sprinting. Climbing stairs. Carrying heavy groceries. Getting through a hard set when your muscles want to quit before you do.

That’s the muscle side.

But creatine also shows up in brain energy metabolism. That is why researchers have been looking at it for memory, attention, processing speed, and mental fatigue.

We don’t need to turn that into a miracle claim. We just need to be honest.

Your muscles use creatine. Your brain uses creatine. And if your diet removes the foods that normally supply it, intake drops.

That matters.

Why plant-based eaters may have a gap

If you eat meat and seafood regularly, you are getting some creatine from your diet.

If you don’t, you’re mostly relying on what your body makes.

That does not mean your body is broken. It does not mean plant-based eating is bad. It means there is a difference between can make some and is getting enough for your current output.

That output piece matters.

A sedentary person, an athlete, a woman over 40 lifting hard, someone fasting while training, someone under stress, someone sleeping poorly, and someone trying to maintain muscle while eating less animal food are not all living in the same body demand.

This is where people get nutrition wrong.

They ask, “Is this diet healthy?”

That question is too vague.

Healthy for whom?

Under what conditions?

With what training load?

With what protein intake?

With what blood sugar response?

With what recovery?

With what nutrient gaps?

That’s the Run Your Plate lens.

Not food identity. Function.

What the research says

Vegetarians tend to have lower dietary creatine intake because creatine is mainly found in animal foods. That is why researchers have looked at whether vegetarians respond differently to supplementation.

One study found that creatine supplementation improved memory in vegetarians more than in people who ate meat.

A 2024 meta-analysis found that creatine monohydrate may support cognitive function in adults, especially memory, attention time, and information processing speed. The authors also said larger, stronger trials are still needed.

So, creatine may be especially useful when baseline intake is low, demand is high, or the body is under extra strain.

That includes many plant-based eaters.

And yes, it can include Orthodox Christians during fasting seasons.

The fasting season piece

During Orthodox Christian fasting seasons, people often focus on what they are giving up.

No meat. No dairy. No eggs. Maybe no fish.

That is part of the practice.

But the body still needs support.

The goal is not to hack the fast. The goal is not to turn the fast into a macro challenge or a performance competition. And it is definitely not to treat fasting like a diet challenge in church clothes.

The goal is to fast with wisdom.

Because depletion is not devotion.

Here's what I mean: If you are fasting and your blood sugar is all over the place, you are exhausted, you are losing muscle, you cannot focus, and you are snapping at everyone in your house, that is not automatically a sign that you are doing something holy.

It may mean you need a better plan.

Creatine is one small part of that plan.

Not the whole thing.

You still need enough protein. Enough calories. Enough fluids. Enough salt. Enough sleep. Enough actual food.

But creatine is one of those quiet supports that can make plant-based seasons feel more stable, especially if you are training.

So, who should pay attention to creatine?

Creatine is worth considering if you:

eat vegan or vegetarian
eat mostly plant-based
rarely eat red meat or seafood
are Orthodox and fasting from animal foods
lift weights or do intense training
feel weaker during plant-based seasons
notice brain fog when animal foods come out
are trying to maintain muscle over 40
struggle with low energy during fasting periods

This does not mean creatine is mandatory.

It means it belongs on the radar.

And if you are already taking it consistently, fasting season is not the time I’d casually drop it just because the food pattern changed.

That is when I would be more likely to keep it in.

What kind of creatine?

The most researched form is creatine monohydrate.

That is the one I would look for first.

You do not need a fancy blend. You do not need a neon tub with a lightning bolt on it. You do not need a supplement that sounds like it was named by a teenage boy trying to deadlift a truck.

Creatine monohydrate. Simple.

The International Society of Sports Nutrition has described creatine monohydrate as one of the most effective supplements for increasing high-intensity exercise capacity and lean body mass during training, and reports no compelling evidence that short- or long-term use harms otherwise healthy people when used appropriately.

A common maintenance amount is around 3 to 5 grams per day. Some people use a loading phase, but many people skip that and just take the daily dose consistently.

Consistency matters more than drama.

What I use and recommend

I keep this simple.

For creatine, I like Thorne Research Creatine because it’s straightforward creatine monohydrate without a lot of unnecessary extras.

I also keep plant protein options in my Fullscript collection because creatine is not a substitute for protein. During plant-based seasons, especially fasting seasons, both questions matter:

Are you getting enough protein?

And are you missing nutrients that usually come from animal foods?

Creatine helps with one piece of the puzzle. Protein helps with another.

I’ve put my creatine and plant protein options together here: shop my Fullscript collection.

Some links may be affiliate links, which means I may earn a commission if you purchase through them. I only share products I actually use or would recommend.

A few cautions

Creatine is generally well-studied, but this is still a supplement.

If you have kidney disease, are pregnant or breastfeeding, take medications that affect kidney function, or have a medical condition that requires nutrition oversight, talk to your healthcare provider first.

Also, creatine can cause a little water-weight increase in some people because it helps muscles store water. That is not fat gain.

Read that again.

That is not fat gain.

It may show up on the scale, especially early on. If you are someone who spirals over a two-pound shift, I want you to understand what is happening before you panic.

Your scale does not know the difference between fat, water, muscle, inflammation, food volume, salt, hormones, and your last bathroom trip.

You do.

Or at least, you can learn.