A question I frequently hear from many of my female coaching clients is, “What supplements do you take?”
This is one I hesitate to answer because supplements are very individualized. Several of the supplements I take are based on bloodwork identifying things I’m deficient in.
That said, there are several supplements that *most* female cyclists can benefit from taking, and there are a few others that *many* other folks may be deficient in.
But First…..
Here’s what I always tell my coaching clients: supplements are called “supplements” for a reason. They are supposed to supplement an already solid foundation.
That foundation includes eating enough calories (chronic under-fueling is VERY common among female cyclists), getting enough of all three macronutrients (carbs for energy, protein for muscle repair, and fats for hormones), and sleeping 7-9 hours per night consistently.
Eating well and getting enough sleep will help far more than any pill or powder ever will.
Additionally, don’t forget that there is a MASSIVE marketing machine out there selling supplements. Globally, the supplement makret is worth hundreds of billions of dollars per year. Really question folks pushing supplements, and do your own research before taking anything.
Protein Powder
Most female athletes are NOT getting enough protein. Active women need somewhere between 1 gram of protein per kilogram of body weight and 1 gram of protein per pound of body weight. For me as a 130 pound woman, that means I need between 60 and 130 grams of protein per day. (I personally aim for around 100 grams per day).
Why such a big range? Different studies have suggested different amounts, but the consensus is that most of us are not getting enough. Try slowly increasing your daily protein intake until you find the sweet spot for you.
Protein is like the construction crew for your muscles. Without enough of it, your body can’t repair and build stronger tissue after hard training sessions.
While real food protein is best, most of us find that it’s really hard to get 100 grams (or more) of protein every day without supplementing.
I use unflavored whey protein because I can sneak it into everything – smoothies, oatmeal, pancakes, even yogurt – without changing the taste.
If you’re vegan, plant protein powders also work well, but you might need slightly more to account for lower bioavailability.

Creatine
Let’s start by busting a myth. Creatine isn’t going to make you “bulky” or turn into a man.
Instead, creatine increases muscle performance in short-duration, high-intensity exercises and helps your muscles produce energy more efficiently. Think of it as giving your muscle’s energy system a turbo boost.
Females naturally have 70-80% lower creatine stores compared to males, which means we might benefit even more from supplementation. Research shows that female athletes who supplemented with creatine increased their bench press strength and reduced body fat more significantly over five weeks compared to those taking a placebo.

Omega 3s
Omega-3 fatty acids are important for everybody but offer some specific benefits for athletes.
Omega 3s improve recovery by decreasing inflammation in muscles. One study found that muscle soreness was significantly lower in the omega-3 group versus placebo at 24 hours post-exercise.
You can get enough Omega 3s by eating fatty fish (like Salmon) twice per week. If you aren’t eating that much, supplement wih EPA and DHA. For athletes, studies showed positive changes with 1 (or more) grams per day for at least 8 weeks.
Electrolytes
Electrolytes are one supplement I recommend every cyclist should be using. In fact, I recommend electrolytes any time you’re sweating. A lack of electolytes can lead to dehydration, cramping, low blood pressure, and inadequate recovery.
You don’t need fancy formulations. Look for any formulation that has sodium, potassium, and magnesium, and a flavor that you enjoy! We’ve tested a bunch and have a list of our favorite electrolyte drinks here.

You may also benefit from additional magnesium supplementation. A study of professional cyclists found that 400mg/day of magnesium during a 3-week stage race exerted a protective effect on muscle damage.
Magnesium also calms the nervous system and improves sleep quality by regulating the sleep-wake cycle. For athletes, better sleep equals bettter recovery.
Caffeine
Caffeine can enhance performance when taken before a race. It’s one of the most researched and effective performance supplements out there.
Some people are super sensitive to caffeine and it can cause jitters, anxiety, or mess with sleep. Start small and see how you respond.
I use caffeine strategically for races or really hard training sessions (or in energy chews when I’m bonking), but not every day.

The “Only If Your Blood Work Or Doctor Says So” Category
Here are a couple of additional supplements that can be helpful for many women, but should be used only with blood work and/or under the direction of a doctor.
- Iron. A shocking number of female athletes are deficient in iron. In fact, in a study of non-professional, highly trained female endurance athletes, 46% were diagnosed with iron deficiency. But please, please, please get tested first. Too much iron can be dangerous.
- Vitamin D. Among athletes generally, the prevalence of vitamin D deficiency is alarmingly high—sometimes exceeding 50%—and tends to be greater in females than males. Get tested first to find out how much you should be taking.
More Stuff You Might Like
- Cycling Nutrition: 9 Tips For Fueling On The Bike
- Everything You Need To Know About Cycling Hydration
- Cycling Recovery: 7 Things You Need To Be Doing
References
- Mercer D, Convit L, Condo D, et al. Protein Requirements of Pre-Menopausal Female Athletes: Systematic Literature Review. Nutrients. 2020;12(11):3527.
- Kato H, Suzuki K, Bannai M, Moore DR. Protein Requirements Are Elevated in Endurance Athletes after Exercise as Determined by the Indicator Amino Acid Oxidation Method. PLOS ONE. 2016;11(6):e0157406.
- International Society of Sports Nutrition position stand: protein and exercise. Journal of the International Society of Sports Nutrition. 2017;14:20.
- Smith-Ryan AE, Cabre HE, Eckerson JM, Candow DG. Creatine Supplementation in Women’s Health: A Lifespan Perspective. Nutrients. 2021;13(3):877.
- Heileson JL, Funderburk LK. The effect of fish oil supplementation on the promotion and preservation of lean body mass, strength, and recovery from physiological stress in young, healthy adults: a systematic review. Nutrition Reviews. 2020;78(12):1001-1014.
- Lewis NA, Daniels D, Calder PC, et al. Are there benefits from the use of fish oil supplements in athletes? A systematic review. Advances in Nutrition. 2020;11(5):1300-1314.
- Omega-3 Fatty Acid Supplementation on Post-Exercise Inflammation, Muscle Damage, Oxidative Response, and Sports Performance in Physically Healthy Adults. Nutrients. 2024;16(13):2044.
- Córdova Martínez A, Fernández-Lázaro D, Mielgo-Ayuso J, et al. Impact of Magnesium Supplementation in Muscle Damage of Professional Cyclists Competing in a Stage Race. Nutrients. 2019;11(8):1927.
- Liguori S, Moretti A, Paoletta M, et al. Role of Magnesium in Skeletal Muscle Health and Neuromuscular Diseases: A Scoping Review. International Journal of Molecular Sciences. 2024;25(20):11220.
- Effects of magnesium supplementation on muscle soreness in different type of physical activities: a systematic review. Journal of Translational Medicine. 2024;22:502.
- Can Magnesium Enhance Exercise Performance? Nutrients. 2017;9(9):946.
- International Society of Sports Nutrition Position Stand: Long-Chain Omega-3 Polyunsaturated Fatty Acids. Journal of the International Society of Sports Nutrition. 2024;21:2441775.
- Shirreffs SM, Sawka MN. Fluid and electrolyte needs for training, competition, and recovery. J Sports Sci. 2011;29 Suppl 1:S39-S46. doi:10.1080/02640414.2011.614269
- Sims ST, Mackay K, Leabeater A, Clarke A, Schofield K, Driller M. High Prevalence of Iron Deficiency Exhibited in Internationally Competitive, Non-Professional Female Endurance Athletes-A Case Study. Int J Environ Res Public Health. 2022 Dec 10;19(24):16606. doi: 10.3390/ijerph192416606. PMID: 36554486; PMCID: PMC9778947.
- Ip TS, Fu SC, Ong MT, Yung PS. Vitamin D deficiency in athletes: Laboratory, clinical and field integration. Asia Pac J Sports Med Arthrosc Rehabil Technol. 2022 Jul 2;29:22-29. doi: 10.1016/j.asmart.2022.06.001. PMID: 35847194; PMCID: PMC9256943.
About the Author

Kristen Bonkoski is a USA cycling and NICA coach, bike educator, and founder of Femme Cyclist.
She’s also the host of the Femme Cyclist podcast and runs Rascal Rides, a website about biking with kids.
She’s been riding bikes for more than two decades and is passionate about empowering women on the bike.
IG: @femme_cyclist



I do the other supplements but haven’t done creatine. When do you take creatine – daily, before workout, or after workout? Of course, the supplement companies are going to say daily AND before/after workouts. I use high quality products (Thorne, Pure Encapsulations, etc), so am looking at their offerings of creatine. Thanks!
There’s not enough data to say for sure, but there’s some research that suggests you should take it close to your workout–either before or after. Personally, I take it right after (or as soon as I remember).