Creatine: The Only Supplement Most People Need
Creatine: The Only Supplement Most People Need
If you take exactly one supplement, take creatine monohydrate.
Not because it's exotic. Because it's the most-researched performance supplement of all time, with over 1,000 studies showing consistent, measurable effects across populations.
It's also cheap, safe, easy, and the supplement industry hates it because there's no premium version to upsell you to.
Here's everything worth knowing in 1,000 words.
What creatine actually does
Your muscles store a compound called phosphocreatine. During high-effort work (the last 2 to 3 reps of a hard set, a 10-second sprint, a heavy single), phosphocreatine regenerates ATP, which is the immediate energy your muscles use to contract.
The more phosphocreatine your muscles have, the more high-effort work they can do before fatigue.
Creatine supplementation increases your muscle stores of phosphocreatine by roughly 20%. Translation: you get one to two more reps on your hardest working sets. Two more reps a session, every session, for a year, equals meaningful additional volume. Meaningful additional volume equals more muscle and more strength.
That's it. That's the entire mechanism.
It's not a steroid. It doesn't change your hormones. It just lets you do slightly more work at peak intensity.
The expected effects
Over 8 to 12 weeks of consistent use, with serious training:
- Strength up 5 to 10% on most major lifts. This is on top of whatever you would have gained without creatine.
- 2 to 4 pounds of bodyweight gain (this is mostly water held inside the muscle cells, where you want it). Your muscles look slightly fuller.
- More reps per set at the same loads. The most concrete benefit you'll feel.
- Slightly faster recovery between sets. Less noticeable but real.
It does not transform you. It is not a one-and-done miracle. It's a roughly 10% boost on top of solid training and nutrition.
That's plenty.
How to take it
The protocol is comically simple.
Dose: 5 grams per day. Every day. Forever.
Timing: doesn't matter. Take it whenever you remember.
With food or without: doesn't matter. The "take with carbs to spike insulin" myth doesn't change long-term outcomes.
Loading phase? Optional. You can take 20 grams a day for 5 to 7 days to saturate faster, or you can take 5 grams a day and reach the same saturation in 3 to 4 weeks. The end state is identical. Loading just gets you there faster.
Cycling on and off? Unnecessary. Continuous use is safer and more effective than cycling.
Form: powder mixed in water. Creatine doesn't taste great but doesn't taste bad. Pills work but cost more for the same dose.
That's the whole protocol.
Which kind to buy
Creatine monohydrate. That's it.
Avoid:
- Creatine HCL. Marketed as "better absorbed." It's not. The studies don't show meaningful difference. Costs 3 to 5x more for the same effect.
- Creatine ethyl ester. Worse absorbed than monohydrate, despite marketing.
- Buffered creatine. No benefit over monohydrate.
- Micronized creatine. Identical to regular monohydrate, just ground finer. Maybe slightly less gritty in water. Not worth the price premium.
- Anything with "blend" in the name. Usually 80% monohydrate with 20% expensive marketing.
Look for "creatine monohydrate" on the label. Most reputable brands sell 1 kg of pure monohydrate for $15 to $30. That's roughly 200 servings, or 6 to 7 months of supply.
Side effects (the real ones, not the myths)
The honest side effects are minor.
Water weight gain. 2 to 4 pounds in the first month. This water is intracellular (inside your muscle cells). It's not "puffiness." Your muscles literally hold more water. Some people see this as a positive (fuller-looking muscles), some as a negative (number on the scale goes up). It's harmless either way.
Minor GI upset. Rare. Usually only happens with very high doses (above 10 g at once) or with low-quality product. Splitting the dose or taking with food usually resolves it.
Increased hydration needs. Drink slightly more water than usual.
The myths:
- Kidney damage. Repeatedly debunked. The "creatine harms kidneys" idea comes from misreading creatinine (a kidney marker) elevations on lab tests, which creatine raises without actually causing kidney damage. Healthy adults can take creatine indefinitely. (If you have pre-existing kidney disease, ask your doctor.)
- Hair loss. One small study suggested a hormonal mechanism. Subsequent research has not confirmed a meaningful effect on actual hair loss. If you're predisposed to male pattern baldness, that's the genetic risk doing the work, not creatine.
- Bloating. What people call "creatine bloat" is the muscle cells holding water. It's not subcutaneous water under your skin. Your face doesn't get puffy from creatine.
- Cramping. Multiple studies show creatine reduces cramping if anything, not increases it.
Does it work for vegetarians and vegans?
Yes, even better than for omnivores.
Vegetarians and vegans have lower baseline muscle creatine because dietary creatine comes primarily from meat. Adding 5 g per day produces a bigger response in plant-based eaters than in omnivores.
If you're vegan and don't supplement creatine, you're leaving meaningful performance and muscle on the table.
Does it work for cardio athletes?
Less impactful than for strength sports, but not useless.
Creatine helps most for activities under 30 seconds at high intensity. Sprints, jumps, short bursts. It's less useful for endurance running, cycling, or other low-intensity, long-duration work.
If you do mixed sports (hockey, soccer, basketball, sprint cycling, CrossFit), creatine still helps because those sports involve short high-intensity bursts.
If you're a pure marathoner, the benefits are minimal.
Does it work for older adults?
Yes, and possibly better than for younger lifters.
Older adults experience faster age-related muscle loss (sarcopenia). Creatine is one of the few interventions with strong evidence for slowing this. It may also have modest cognitive benefits in older populations.
Anyone over 50 lifting weights should be on creatine if they're not.
Does it work for women?
Yes. The supplement industry sometimes markets creatine as "for men." Studies show the effects are essentially identical in women, including the water weight gain (proportionally smaller) and the strength gains.
Some women avoid creatine because of the water weight. That's a cosmetic preference. The water lives in your muscles, not under your skin. It actually makes muscles look more defined, not less.
Common questions
"Do I need to take it on rest days?" Yes. It's not pre-workout. It's saturation-based. Take it every day to maintain the saturation in your muscle cells.
"Will it interfere with my other supplements?" No known interactions with protein, vitamins, omega-3, caffeine, or anything else on the legitimate supplement list.
"How long until I feel a difference?" 2 to 4 weeks if you don't load. 5 to 7 days if you load. The "feeling" is usually being able to push one or two more reps on your hardest sets.
"Can I take more than 5 g a day?" Larger doses don't add benefit. Your muscles saturate at a fixed level. Excess creatine is excreted in urine.
"Should I take it before or after my workout?" Doesn't matter. Take it whenever you're most likely to actually remember.
What to do next
Today: buy 1 kg of plain creatine monohydrate from any reputable brand. Cost: ~$25.
Tomorrow: start taking 5 grams a day. Mix in water, juice, or your protein shake. Don't worry about timing.
In 30 to 60 days: notice that your hardest working sets have one or two extra reps in them.
In 90 days: notice that your strength on major lifts has climbed faster than the previous quarter.
That's the whole protocol. One supplement. One dose. Indefinite.