Best Supplements for HYROX: What the Research Actually Supports

The best supplements for HYROX are not exciting. They are the few with years of research behind them, taken every day, from a brand that tests what’s in the tub.

This guide is based on published research and product specs, listed under Sources. HYROX Vegas is a Momentous ambassador: our Momentous links use our referral link, code HYROXVEGAS applies automatically, and we earn a commission if you buy. It doesn’t change what the research says, and we tell you where cheaper options work just as well. See our affiliate disclosure.

Supplements don’t replace the basics

A HYROX race is 8 km of running and eight stations, which takes most racers well over an hour. No powder makes up for missed training, low food intake or poor sleep. Get your training plan and your pacing right first. Supplements add the last few percent.

1. Creatine: the best supplement for HYROX

If you buy one supplement, make it creatine monohydrate.

The International Society of Sports Nutrition (ISSN) calls it “the most effective ergogenic nutritional supplement currently available to athletes” for increasing high-intensity exercise capacity and lean mass during training, according to the Exercise & Sport Nutrition Lab’s summary of its position stand. HYROX stations like the sled push, sandbag lunges and 100 wall balls are exactly that kind of work.

How to take it, per the ISSN:

• Simple: 3–5 g a day. Muscle stores rise over 3–4 weeks.
• Faster: about 0.3 g per kg a day for 5–7 days to load, then 3–5 g a day.
• Safety: the ISSN found no compelling evidence of harm in healthy people, including long-term use. NutraIngredients notes that the review was funded by an industry group, the Council for Responsible Nutrition.

Our pick: Momentous Creatine. It’s 5 g of creatine monohydrate per scoop, 60 servings, and NSF Certified for Sport. Momentous lists it at $49.99, or $37.49 with subscribe and save, as of October 23, 2026.

Honest note: creatine monohydrate is creatine monohydrate. Any third-party certified version gives the same 5 g. You’re paying for the testing and the brand.

2. Protein: hit your daily number

HYROX training breaks down a lot of muscle, and protein is what you rebuild it with. The ISSN’s protein position stand, summarised by the Exercise & Sport Nutrition Lab, recommends:

What	ISSN guidance
Daily total	1.4–2.0 g per kg of body weight for most exercising people
Per meal or shake	About 20–40 g, or 0.25 g per kg
Timing	Spread doses every 3–4 hours
Before bed	30–40 g of casein can raise overnight muscle protein synthesis

For a 75 kg racer, that’s about 105–150 g a day. Most people can get there with food. A shake is the easy way to close the gap.

Our pick: Momentous Whey Protein Isolate: 20 g of grass-fed whey per serving, 25 servings, NSF Certified for Sport. Momentous lists it at $69.99, or $52.49 with subscribe and save.

3. Electrolytes: the Las Vegas factor

You lose sodium as well as water when you sweat. Sports Performance Bulletin explains that adding salt helps your body hold on to fluid, while plain water drunk fast can simply pass through. Its summary of ACSM guidance: drink 400–600 ml about 2 hours before training and 150–350 ml every 15–20 minutes during it.

In the Nevada heat, that matters on every long session. Read our desert heat training guide for the full plan.

Our pick: Momentous Daily Hydration for everyday drinking: 100 mg sodium per packet, NSF Certified for Sport. For hot, sweaty sessions you’ll want more sodium, so compare a higher-sodium mix like LMNT in our best electrolytes for HYROX guide.

4. Sleep: the recovery tool you already own

Sleep is when training turns into fitness. Get the basics first: a consistent bedtime, a cool dark room, and less caffeine late in the day.

If you want a sleep supplement, choose a tested one without melatonin. Momentous Nightly Sleep combines 200 mg magnesium bisglycinate, 200 mg L-theanine and 50 mg apigenin, is NSF Certified for Sport, and costs $59.99 for 30 servings. The evidence for these ingredients is thinner than for creatine or protein, so treat it as optional.

Why “NSF Certified for Sport” matters

Supplements aren’t approved before they’re sold, so a label is a promise, not a guarantee. The NSF Certified for Sport mark means a product:

• doesn’t contain any of 290 substances banned by major athletic organisations
• matches what’s printed on the label
• has no unsafe levels of contaminants
• is made in a GMP facility that NSF audits

That’s why every product we recommend here carries it.

What to skip

Skip anything that promises fat loss, hormone boosts or “instant” energy, and anything without third-party testing. And never try a new product on race day.

Your HYROX supplement stack

Supplement	Dose	Priority
Creatine monohydrate	3–5 g a day	Must have
Protein	Fill the gap to 1.4–2.0 g/kg a day	Must have if food falls short
Electrolytes	Long or hot sessions	High in Las Vegas
Sleep support	Nightly, optional	Nice to have

Shop the stack: Momentous, with code HYROXVEGAS applied automatically through our link. More picks on our HYROX gear page.

This is general information, not medical advice. Talk to your doctor before starting a supplement, especially if you have a medical condition or take medication.

For recovery after hard sessions, see the best recovery tools for HYROX.