Creatine Guide — Benefits, Dosage, Safety and Myths
Creatine monohydrate is the most studied sports supplement in history — hundreds of trials, decades of use — and the conclusion is unusually consistent: it improves strength and power by a small but real amount, it is safe for healthy adults, and it is cheap. It is also surrounded by myths (hair loss, kidney damage, bloating, 'it is a steroid') that refuse to die despite the evidence.
This guide covers what creatine does, how much to take, whether loading is worth it, who should be cautious, and which claims are true and which are not. The short version: 3–5 g a day, every day, indefinitely, for anyone who trains with weights.
Use the calculator
Start with the numbers: try our protein calculator and the macro calculator to work out your own figures before applying anything on this page. The worked examples below use round numbers so you can follow the maths; the calculators use your real weight, height, age and goal.
Related reading: protein calculator, macro calculator, Muscle Gain Diet — Calories, Protein and Meal Structure, Sleep and Muscle Growth — Why 7-9 Hours Is Non-Negotiable. You can also browse the full guides section for the rest of the series.
The key points
What creatine does. Creatine is stored in muscle as phosphocreatine, which rapidly regenerates ATP — the immediate energy for short, intense efforts such as a heavy set of five reps or a sprint. Supplementing raises muscle creatine stores by about 20–40%, which lets you do one or two more reps per set, recover faster between sets, and train slightly harder over weeks. The result is a small strength and muscle advantage (typically 5–15% more strength gain than training without it) that compounds over months. It does not build muscle by itself — it lets training build more of it.
Dosage: 3–5 g a day, every day. The standard dose is 3–5 g of creatine monohydrate a day, taken at any time, with any meal, every day — including rest days, because the goal is to keep muscle stores saturated, not to time a single dose. There is no benefit to taking more than 5 g (the excess is excreted), and no need to cycle on and off. Taking it with carbohydrate or protein may improve uptake slightly, but the difference is small — consistency matters far more than timing. Mix it in water, a shake or yoghurt; it does not dissolve well in cold water, so stir it.
Loading: optional, not necessary. A loading phase of 20 g a day (split into four 5 g doses) for five to seven days saturates muscle stores in about a week, versus about four weeks on 3–5 g a day. The end point is identical — the same saturation, the same benefit — so loading only buys three weeks. It also causes more stomach discomfort and more initial water retention, which is why most people should skip it and just take 3–5 g a day. If you want the benefit sooner (a competition in two weeks, for example), load; otherwise, do not bother.
Water retention: real, small and harmless. Creatine draws water into muscle cells, and most people gain 1–2 kg in the first few weeks — water inside the muscle, not fat, and not the bloated look people fear. It is actually part of how creatine works (cell volumisation is associated with muscle protein synthesis), and it reverses within weeks of stopping. If the scale jumps 1–2 kg in the first month of creatine, that is the water, not fat gain — judge progress by strength and by the trend after the first month, not by the first two weeks.
Safety and the kidney question. Creatine is safe for healthy adults at 3–5 g a day, based on decades of trials and long-term studies with no evidence of harm to kidneys or liver in healthy people. The kidney concern comes from a misunderstanding: creatine raises blood creatinine, which is a marker used to estimate kidney function — so a blood test can look worse while the kidneys are fine. That is why anyone with kidney disease, or abnormal kidney blood tests, should discuss creatine with their clinician before using it, and why you should tell your doctor you take it before a kidney blood test. For healthy kidneys, the evidence is reassuring.
Myths that refuse to die. Creatine is not a steroid — it is a compound your body makes and that occurs in meat and fish, and it is not banned by any sports body (it is permitted by WADA). It does not cause hair loss: one small study found a rise in DHT (a hormone linked to hair loss) and the finding has never been replicated, so the link is unproven. It does not cause cramps or dehydration — trials find no higher rate of either, and some find fewer cramps. And it does not need to be cycled: there is no evidence that long-term use stops working or harms health, and stopping simply returns muscle stores to baseline over four to six weeks.
At a glance
| Claim | Verdict | Evidence |
|---|---|---|
| Improves strength and power | True | Hundreds of trials; 5–15% more strength gain |
| Builds muscle directly | False | It lets training build more muscle; it does not build it alone |
| Causes kidney damage (healthy adults) | False | No evidence of harm at 3–5 g/day in healthy people |
| Causes hair loss | Unproven | One small unreplicated study on DHT |
| Is a steroid / is banned | False | Permitted by WADA; not a steroid |
| Needs cycling | False | No evidence; stores return to baseline on stopping |
| Causes cramps/dehydration | False | Trials find no higher rate |
Your plan, step by step
- Buy plain creatine monohydrate (micronised if you prefer it to mix better); skip blends and expensive forms.
- Take 3–5 g every day, at any time, with food or a shake — including rest days.
- Skip loading unless you need saturation within a week; it buys three weeks and causes more gut discomfort.
- Expect 1–2 kg of water weight in the first month; judge progress by strength after that.
- Tell your doctor you take creatine before kidney blood tests, and do not use it if you have kidney disease without medical advice.
The formula behind it
Creatine dosing is weight-based in the research literature: the maintenance dose that saturates muscle is roughly 0.03–0.05 g/kg of body weight a day, which is where the standard 3–5 g figure comes from.
Worked example — an 80 kg lifter: 80 × 0.03 = 2.4 g at the low end, 80 × 0.05 = 4.0 g at the high end, so 3–5 g a day covers it. A 100 kg lifter needs 3–5 g by the same maths (100 × 0.03 = 3.0 g, 100 × 0.05 = 5.0 g). A loading dose is 0.3 g/kg a day for five to seven days — 24 g a day at 80 kg, split into four 6 g doses — which is why loading causes more stomach discomfort than the 3–5 g maintenance dose. Use the protein calculator to check that your daily protein (1.6 g/kg for lifters, or 128 g at 80 kg) is in place first: creatine without enough protein is a minor gain on a missing foundation.
How to use this guide
The pattern that works is the same for every topic on this page: understand the principle, apply it for two to four weeks, and judge it by what changes — not by how it feels on day one. Most fitness and nutrition advice fails not because it is wrong but because it is applied for three days and then abandoned. Pick the one or two changes from this guide that fit your life, do them consistently for a month, and only then decide whether they are working. If you try to change everything at once, you will not know what helped, and you will not sustain any of it.
Related pages on this site go deeper on the numbers behind this guide: the calculators apply the same formulas shown here to your own weight, height, age and goal, and the protein, macro and body-composition articles work through the maths for specific cases. Use this guide for the understanding and the calculators for your own figures — neither replaces the other.
What this guide does NOT tell you
No guide can replace individual advice. The numbers and ranges on this page are population estimates from published research, and they describe what works on average — your body, your health conditions, your medicines and your training history all shift the answer. This guide does not diagnose anything, prescribe anything, or predict your results. If you have a medical condition (especially heart disease, diabetes, kidney or liver disease, an eating disorder, or a hormone condition), are pregnant, or take prescription medicine, the right next step is a clinician or a registered dietitian, not a more detailed article.
The other limit is honesty about evidence. Some claims in fitness are supported by randomised trials; others are supported by tradition, by a single small study, or by nothing at all. This guide says which is which where it matters, and where the evidence is thin it says so rather than dressing a guess up as a fact. A guide that admits uncertainty is more useful than one that pretends to know everything — and a reader who knows the limits of the advice is safer than one who follows it blindly.
Frequently asked questions
How much creatine should I take a day?
Three to five grams of creatine monohydrate a day, every day, including rest days. That dose saturates muscle stores within about four weeks and maintains them indefinitely. There is no benefit to more than 5 g — the excess is excreted — and no need to cycle. Take it at any time of day, with food or a shake.
Do I need to load creatine?
No. Loading (20 g a day for five to seven days) saturates muscle in about a week instead of four, but the end point is identical, and loading causes more stomach discomfort and water retention. Skip it unless you need the benefit within a week or two — for example, before a competition. For everyone else, 3–5 g a day from the start is simpler and equally effective.
Is creatine safe for my kidneys?
For healthy adults, yes — decades of trials at 3–5 g a day show no harm to kidneys or liver. The confusion comes from creatinine: creatine raises blood creatinine, which is the marker used to estimate kidney function, so a blood test can look worse while the kidneys are fine. If you have kidney disease or abnormal kidney blood tests, discuss creatine with your clinician first, and tell your doctor you take it before any kidney blood test.
Will creatine make me bloated or gain fat?
Creatine causes 1–2 kg of water retention inside muscle cells in the first few weeks, which is not fat and not bloating in the usual sense — it is water in the muscle, where it belongs. It does not cause fat gain: it has no calories. If the scale jumps in the first month, that is water; judge fat and muscle by the trend after the first month and by strength, not by the early scale jump.
Can women take creatine?
Yes. The evidence for creatine is as strong for women as for men — strength, power and muscle gains are similar, and there is emerging research on benefits for bone health and cognition in older women. The dose is the same (3–5 g a day), and the myths (that it is only for men, or that it causes bulk) are unfounded. Vegetarians and vegans may benefit more, because they get almost no creatine from food.
Estimates only, not medical advice. Minimum safe intakes: 1,200 kcal/day women, 1,500 kcal/day men — consult a healthcare professional before a very-low-calorie diet.