CREATINE: The Supplement Everyone Has an Opinion About (and Most People Get Wrong)

Creatine is one of the most researched supplements in history… and somehow, it’s still surrounded by myths, fear, and internet nonsense.

Let’s cut through it with what the data actually shows — what it does, who it’s for, how to take it, what’s safe, what’s not, and why it keeps showing up in elite sports and in clinical research.

What Creatine Actually Is (No, It’s Not a Steroid)

Creatine is a naturally occurring compound your body already makes (mainly in the liver and kidneys), and you also get some from food (especially red meat and fish).

Inside your muscle (and brain), creatine helps recycle energy rapidly by supporting the phosphocreatine system — the “instant power” energy system used for:

heavy lifting

sprinting

jumps

explosive work

hard sets close to failure

If your workouts involve intensity, creatine matters.

What Creatine Does (The Real Benefits)

1) Strength + Power

Creatine consistently improves performance in high-intensity, short-duration training — meaning you can often do:

more reps

more total volume

higher quality work

Over time, that adds up to better strength and more muscle stimulus.

2) Muscle Gain (Indirect, But Real)

Creatine doesn’t “build muscle by itself.”

It helps you train harder and recover better → which drives better long-term adaptation.

Also: it increases water inside the muscle cell (intramuscular water). That’s not fake muscle — it’s a real physiological effect that can support training performance and may contribute to growth signaling.

3) Recovery, Training Tolerance, and More Work Capacity

People often notice:

less drop-off across sets

better repeat performance

better ability to handle volume

Not magic. Just better energy recycling.

4) Brain Benefits (Promising, Not Guaranteed)

Your brain uses a ton of energy. Creatine is being studied for potential cognitive benefits, especially in:

sleep deprivation

older adults

people with low dietary creatine intake (vegetarians/vegans)

The evidence is encouraging, but it’s not “limitless brain power.” It’s a developing area with real potential — and it’s not settled science yet.

Who Should Consider Using Creatine?

If you fall into any of these categories, creatine is worth serious consideration:

People who lift weights

If you want to get stronger, build muscle, or improve training performance — it’s one of the few supplements with consistent results.

Athletes

Creatine can benefit repeated sprint ability, explosive performance, and total training quality (depending on the sport).

Older adults

Aging includes a gradual loss of muscle and power. Creatine may help support resistance training outcomes in older populations (especially when paired with lifting).

People who eat little to no meat

Vegetarians/vegans often start with lower baseline creatine stores, which may make supplementation more noticeable.

Who Should NOT Use Creatine (or Needs Medical Clearance First)

This is where the internet gets reckless.

Creatine is generally safe for healthy adults at recommended doses — but that does NOT mean it’s for everyone.

Get medical clearance first if you have:

Known kidney disease or reduced kidney function

A history of serious kidney issues

Uncontrolled hypertension + kidney risk

You’re on medications that can stress kidneys (ask your clinician)

Also avoid or use caution if you are:

Pregnant or breastfeeding (not because it’s proven harmful — because long-term safety data is limited)

A child/young teen (again: limited long-term data in minors)

“Creatine Ruins Your Kidneys” — The Myth That Won’t Die

Here’s the truth:

Creatine can raise serum creatinine on bloodwork.

That’s expected — and it’s where confusion starts.

Creatinine is a breakdown product related to creatine metabolism and is used as a kidney marker. If you supplement creatine, serum creatinine may rise modestly without kidney damage.

So if someone starts creatine and later sees higher creatinine on labs, a lazy interpretation is:

“Your kidneys are failing.”

A smarter interpretation is:

“Creatine can affect this marker — let’s evaluate kidney function properly (eGFR trends, clinical context, and other markers).”

Bottom line: In healthy people using standard dosing, the total research body does not support the claim that creatine damages kidneys.

Side Effects (What’s Real vs What’s Fearmongering)

Most common: GI upset

Cramping, bloating, diarrhea

This is usually from taking too much at once or doing aggressive loading.

Fix:

split doses

take with food

reduce dose

Water weight (not fat)

Creatine increases water inside muscle cells. Some people gain 1–4 lb early. That’s not fat gain.

“Hair loss”

You’ll see this claim everywhere. Human evidence is not strong or conclusive. If you’re genetically prone to hair loss, don’t use creatine as the scapegoat for what genetics was already doing.

“Dehydration” / “cramps”

This myth has not held up well in research. Still, hydration matters for everyone — creatine or not.

The #1 Rule: Use the Right Kind

If you remember one thing, remember this:

Creatine monohydrate is the gold standard.

Most studied. Most effective. Best value.

You do not need:

“buffered creatine”

“ethyl ester”

overpriced designer blends

“transport systems”

hype labels that triple the cost

That stuff exists because marketing is profitable — not because it works better.

How to Take Creatine (Simple and Evidence-Based)

The easiest method (recommended):

3–5 grams per day, every day.

That’s it.

Consistency beats creativity.

Loading (optional)

Some people do:

20 g/day split into 4 doses for 5–7 days

Then:

3–5 g/day ongoing

Loading saturates stores faster, but it’s not required, and it increases GI risk.

Timing?

Not a big deal.

Take it whenever you’ll remember consistently.

How to Buy Creatine Without Getting Scammed

Supplements aren’t regulated like medications. Quality matters.

Look for:

Creatine monohydrate (single ingredient)

Third-party testing (NSF Certified for Sport / Informed Choice are strong signals)

Simple labeling, no “proprietary blends”

A brand that shares testing or certifications

If you can’t verify quality, don’t assume it’s clean.

The Real Takeaway

Creatine isn’t a fad.

It isn’t a steroid.

It isn’t a shortcut.

It’s a well-supported performance and training-adaptation tool that helps you do more high-quality work — and over time, that’s what drives results.

And if someone is still terrified of creatine in 2026 while drinking three energy drinks a day, sleeping 5 hours, and eating 30 grams of protein… the problem isn’t creatine.

The problem is priorities.

References

International Society of Sports Nutrition (ISSN) Position Stand: Safety and efficacy of creatine supplementation in exercise, sport, and medicine (2017).

FDA GRAS Notice Inventory: Creatine Monohydrate (GRN 931) and FDA “no questions” response materials.

Systematic review & meta-analysis: Effect of creatine supplementation on kidney function (2025).

Systematic review & meta-analysis: Effects of creatine supplementation on cognitive function in adults (2024).

Narrative review: Common safety concerns and misconceptions about creatine monohydrate (2025).