Creatine and whey protein do different jobs, so the useful question is which gap in your routine to fix first. Creatine helps you do more work in short, hard efforts. Whey helps you reach the protein your muscles need to rebuild.
This guide gives a simple rule for the order, the doses the research supports, and how to take both together. If you are still working out your daily protein number, start with our guide on how much protein you really need.
Quick Answer: Creatine or Whey First?
Fix your daily protein first. Add creatine once you reach about 1.6 g of protein per kg of body weight most days. A meta-analysis of 49 trials found protein supplementation stopped adding muscle gains around 1.6 g per kg a day. Creatine monohydrate is the most studied supplement for strength and training capacity, at 3 to 5 g a day after the stores are full.
What Creatine and Whey Each Do
Creatine is a compound your body makes and also gets from meat and fish. About 95% of it sits in skeletal muscle, where it helps regenerate ATP during short, maximal efforts such as a heavy set or a sprint. The body needs to replace roughly 1 to 3 g a day, and about half comes from food. A pound of uncooked beef or salmon supplies about 1 to 2 g (Kreider et al., 2017).
Whey is a milk protein that digests quickly and is rich in leucine, the amino acid most tied to muscle protein synthesis. Its job is to supply protein. Our guide to whey protein powder benefits and types covers the basics, and whey isolate vs concentrate compares the two common forms.
So creatine changes how hard you can train, and whey changes how well you can recover from it. Neither replaces the other.
What the Research Shows
For creatine, the International Society of Sports Nutrition position stand concludes that creatine monohydrate is the most effective supplement for raising high-intensity exercise capacity and lean body mass during training. After a loading phase, performance in high-intensity and repetitive exercise generally rises by 10 to 20%, depending on how much muscle phosphocreatine increases (Kreider et al., Journal of the International Society of Sports Nutrition, 2017).
For protein, a meta-analysis of 49 trials in 1,863 participants found that protein supplementation improved muscle strength and size gains during resistance training, and that the benefit levelled off at about 1.6 g per kg of body weight a day (Morton et al., British Journal of Sports Medicine, 2018). The ISSN protein position stand gives a wider range of 1.4 to 2.0 g per kg for people who exercise (Jäger et al., Journal of the International Society of Sports Nutrition, 2017).
One trial tested both. In 11 weeks of supervised resistance training in trained men, groups taking creatine with carbohydrate, whey protein alone, or creatine with whey all gained more strength and muscle than a carbohydrate-only group. Hypertrophy results varied between groups and between measures, so the trial does not show that combining them is clearly better than taking one (Cribb et al., Medicine & Science in Sports & Exercise, 2007).
Which to Take First
- Protein below about 1.6 g per kg most days. Start with whey, or with more food protein. You cannot build much without the raw material, and the research shows the largest returns up to that point.
- Protein already on target. Add creatine. It is the next supplement with strong evidence for strength and training capacity.
- Vegetarian or low meat intake. Creatine may help more. The position stand reports lower muscle creatine stores in vegetarians, so they may see bigger gains from supplementing.
Work out your number by multiplying your body weight in kg by 1.6. For a 70 kg person that is 112 g a day. Add up what you eat for three days, then cover the gap with food first. Our high protein diet guide has meal ideas, and the protein powder for muscle gain guide covers how much a powder adds.
Taking Creatine and Whey Together
There is no known conflict between the two. The position stand reports that taking creatine with carbohydrate, or with carbohydrate and protein, tends to improve creatine retention (Kreider et al., 2017).
A practical combination is 3 to 5 g of creatine monohydrate stirred into one scoop of whey. Func Lab's Whey Protein Isolate gives 29 to 30 g of protein per scoop, and Whey Protein Concentrate gives about 22 to 25 g. A shaker bottle helps the powders mix, and our shaker bottle guide covers options. If your shake turns out gritty, read why protein shakes go gritty.
Func Lab does not sell creatine, so buy it separately. Choose creatine monohydrate and check that the brand publishes batch test results.
How to Take Creatine
- Fast route. About 0.3 g per kg of body weight a day, split into four doses (roughly 5 g each for most adults), for 5 to 7 days. This raises muscle creatine and phosphocreatine by 20 to 40%.
- Slow route. 3 to 5 g a day with no loading. A 3 g a day dose took 28 days in the research, and the position stand notes it may affect performance less until stores are full.
- Maintenance. 3 to 5 g a day once stores are full. Larger athletes may need more.
- Rest days. Keep taking it. Stores fall back to baseline over 4 to 6 weeks after you stop.
- Mixing. Creatine slowly converts to creatinine in liquid, so mix it fresh and drink it soon.
Source for all dosing figures: Kreider et al., Journal of the International Society of Sports Nutrition, 2017.
How to Take Whey
Aim for a total daily intake in the 1.4 to 2.0 g per kg range, and spread it across meals. The ISSN protein position stand suggests about 0.25 g per kg, or 20 to 40 g, per meal (Jäger et al., Journal of the International Society of Sports Nutrition, 2017). Func Lab's directions for whey isolate are one scoop in 200 to 250 ml of water, and for whey concentrate one scoop in 300 to 350 ml. Pick a time you will keep to, since our guide on the anabolic window myth explains why timing matters less than total intake.
Safety and Side Effects
The position stand describes weight gain as the only consistently reported side effect of creatine. Loading can hold 0.5 to 1.0 L of fluid in the short term. In collegiate football players taking about 16 g a day for 5 days and 5 to 10 g a day for 21 months, markers of kidney function, liver enzymes and electrolytes did not differ from controls (Kreider et al., 2017). People with existing kidney disease should ask their doctor before starting creatine.
Whey is a milk protein. It can cause bloating in people who are sensitive to lactose, and isolate has less lactose than concentrate. Our guides on whey protein side effects and protein bloating cover what to watch for, and protein and kidney health reviews the evidence on kidneys. Func Lab publishes batch test results on its Certified page.
Frequently Asked Questions
Do beginners need creatine and whey protein?
Not at first. Training and enough food drive most of the early progress. If your meals fall short of your protein target, a whey scoop is the easier fix. Creatine is optional once your training and protein are consistent.
Can women take creatine?
Yes. The ISSN position stand reports benefits in men and women, and notes that some studies suggest women may see smaller gains in strength and muscle mass. Most of the research has been done in men.
Do I need to load creatine?
No. Loading at about 0.3 g per kg of body weight, split into four doses a day for 5 to 7 days, fills muscle stores fastest. Taking 3 g a day for 28 days gets you to a similar place more slowly, and the position stand notes the slower route may have less effect on performance until stores are full.
Should I take creatine on rest days?
Yes. Creatine works by keeping muscle stores topped up over time, not by acting as a pre-workout. A daily 3 to 5 g dose keeps stores full, and stores take about 4 to 6 weeks to return to baseline after you stop.
Does creatine cause fat gain or kidney damage?
The most consistent side effect in the research is weight gain, and loading can hold 0.5 to 1.0 L of extra fluid in the short term. Studies in athletes taking 5 to 10 g a day for 21 months found no differences in kidney function markers. People with existing kidney disease should ask their doctor first.
Does creatine mix with whey protein?
Yes. The position stand reports that taking creatine with carbohydrate, or with carbohydrate and protein, tends to improve creatine retention. Mix it into your shake and drink it soon after, because creatine slowly breaks down in liquid.
Which creatine form should I buy?
Creatine monohydrate. The position stand says claims that other forms absorb better or break down less are unfounded, and monohydrate is the form most studied.
Is creatine safe for teenagers?
The ISSN position stand considers it acceptable for supervised, serious young athletes who eat a balanced diet and stay within recommended doses, and notes that under-18 warnings on labels are a legal precaution. For most teenagers, talk to a pediatrician first.
The Bottom Line
Creatine supports hard training, and whey helps you reach the protein that training needs. Reach about 1.6 g of protein per kg first, then add 3 to 5 g of creatine monohydrate a day.
If you are short on protein, a scoop of whey isolate or whey concentrate closes the gap. If you have kidney disease, are pregnant or breastfeeding, or are under 18, speak to a doctor before using either.
This article is for general information and is not medical advice.
