4.7 | 2,133 reviews

Replace All Your Supplements With One Daily Drink.

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  • Men’s Health
  • healthylife Pharmacy
  • Aid Station
  • The Sydney Morning Herald
  • Little Valley Distribution
  • Flannerys
  • GQ
  • Rener Health Products
  • Vitalus

Simplify Your Health

Try for 90 days. See results or get a full refund. Cancel or pause anytime

Clinically Tested For Real Results

Join over 600,000 customers who noticed visible results after using FON products for at least 90 days.

Before
After

I wanted to tone up without living at the gym. OneFit made the nutrition part simple, so I could put my energy into training.

Stephanie T. 27 - Verified Buyer
  • Weight Loss
  • Lean Muscle
  • Energy
Before
After

Cut the afternoon crash completely within the first couple weeks. The muscle definition came later, but honestly the energy alone was worth it.

Jason M. 36 - Verified Buyer
  • Weight Loss
  • Energy
  • Lean Muscle
Before
After

What sold me was how fast my recovery improved. I was back in the gym the next day instead of dreading it…the rest just followed.

Karina L. 42 - Verified Buyer
  • Weight Loss
  • Recovery
  • Energy
Before
After

I have been using OneFit for almost three months now. Energy was the first thing I noticed, and then I started to notice the physical results…

Lilly B. 29 - Verified Buyer
  • Weight Loss
  • Energy
  • Lean Muscle
Start Your Transformation

Every Ingredient Has Clinical Backing

Lean Muscle Support 25g Collagen Protein
Strength & Endurance 5g Creatine Monohydrates
Instant Hydration 1g Electrolytes
Burn Fat Easier 1g L-Carnitine
Daily Defense 16 Vitamins & Minerals
Learn More →
NAD+ Restoration 1g NMN Pure
Longevity Support 1g Resveratrol
Energy Production 200mg CoQ10
Cellular Hydration Full Spectrum Electrolytes
Stress Support 300mg KSM-66 Ashwagandha
Learn More →
Strength & Power CreaForte® Creatine
Smarter Recovery PeptiStrong® Peptides
Coming SoonLearn More →

Ready In 30 Seconds

How To Make

Your new everyday health ritual

  1. SCOOP Add one scoop into 250 mL water.
  2. SHAKE Blend or shake well.
  3. ENJOY! Best served cold
  1. SCOOP One serve into ~200ml of cold water.
  2. STIR Stir. Done in 60 seconds.
  3. ENJOY! Best taken first thing in the morning on an empty stomach.
Try It Now

90-Day Money-Back Guarantee

Trusted By Leading Doctors & Athletes

Join over 600,000 customers who noticed visible results after using FON products for at least 90 days.

Anna Bearpark Senior Medicine Development
Jennifer May Clinical Nutritionist and Director of Food Intolerance Australia
Jessica Povall Specialising in concussion management and clinical neurology
Brett Hallam FON Member & Athlete
Jon Berry FON Member & Athlete
Darren Speight FON Member & Athlete
Dom Sheppard FON Member & Athlete
Jonna Walberg FON Member & Athlete

Google Rated 5 out of 5 4.7 (2,133 reviews)

2,000+ Verified Google Reviews

Rated 5 out of 5
“Before OneFit® I was using protein, creatine, electrolytes, and a couple of ‘extras’. I’d miss days because it was annoying. OneFit® replaced that whole routine with one sachet. I’m actually more consistent now and that’s where the results came from.”
Emily T. Google Review
Rated 5 out of 5
“I’ve tried a lot of supplements. The problem was never motivation... it was sticking with them. OneFit® is the first thing that’s actually fit into my day. One sachet after movement, or once daily, and I don’t have to think. That simplicity is why it’s worked for me.”
James R. Google Review
Rated 5 out of 5
“I didn’t have to guess for weeks. Within the first few days I noticed cleaner energy and better bounce-back after activity. That early signal gave me confidence to keep going and the visible changes followed.”
Sarah M. Google Review
Rated 5 out of 5
“Some weeks I train hard. Some weeks it’s just walks or light movement. OneFit® still makes sense either way. It’s not about smashing workouts it’s about supporting your body after you move. That flexibility is a big reason I’ve kept using it.”
Jess S. Google Review
Rated 5 out of 5
“I’m skeptical by default. I read labels and look for testing. OneFit® was clear about what’s in it and why. The dosing made sense, the testing was there, and it didn’t feel like a ‘throw everything in’ formula. That transparency is what earned my trust.”
Alex P. Google Review
Rated 5 out of 5
"Not going to lie, I expected it to taste like grass. It doesn't. Mixed it with cold water, honestly tastes like a light juice. My wife tried it and now she's on the Duo plan. That says enough."
Chris R. Verified Review
Rated 5 out of 5
"First few days I didn't notice much. By week two I was waking up before my alarm and actually feeling sharp by 8am. Sleep's deeper too — I'm not waking up at 3am anymore. Three months in now and I'm not going back."
Lisa T. Verified Review
Rated 5 out of 5
"I started taking it for energy and focus — the perimenopause fog was getting unbearable. Got that within a few weeks. But by month two, people started commenting on my skin. My aesthetician asked what I'd changed. That's when I knew it wasn't placebo."
Sarah M. Verified Review
Rated 5 out of 5
"I bought the single plan in November. By December my husband kept asking for a sip of mine every morning. We switched to the Duo in January. It's become our morning thing — two sachets, two glasses, out the door. Cheaper than our old coffee order too."
David P. Verified Review
Rated 5 out of 5
"Capsules get forgotten. Powders need a scoop and a shaker. The sachet format is genuinely the reason I've stuck with this for 4 months. Tear, pour, stir, done. Airports, hotels, offices — doesn't matter. If it wasn't this easy I wouldn't still be taking it."
Emily T. Verified Review
Rated 5 out of 5
"I took AG1 for a year. Honestly couldn't tell you what it did other than make my pee green. Switched to OneLife™ because of the NMN and resveratrol — actual ingredients with actual clinical doses. Felt the difference within two weeks. Wish I'd switched sooner."
Maya A. Verified Review
Rated 5 out of 5
"I didn't buy this for sleep. I bought it for energy. But the first thing I noticed was I stopped waking up at 3am. Then I stopped needing a coffee before 10. Then my wife asked if I'd been working out because my face looked different. Three things changed from one sachet. Not bad."
James O. Verified Review
Rated 5 out of 5
"Had routine bloods done at month two. Inflammation markers down, vitamin D up, cortisol in range for the first time in three years. My GP asked what I'd changed. I showed her the sachet. She said keep doing whatever you're doing. That was good enough for me."
Leah P. Verified Review
Rated 5 out of 5
"I've drunk some horrible supplement concoctions over the years. This isn't one of them. Mixed with cold water it genuinely tastes fine — light, slightly citrusy, no chalky aftertaste. My pre-workout tastes worse and costs more. This was a non-issue."
Tom B. Verified Review
Rated 5 out of 5
"I'm 46 with a 6-year-old and a 3-year-old. I don't have the luxury of slowing down. Started OneLife™ because I want to be sharp and active when they're adults, not just alive. Four months in and I have more energy for them now than I did two years ago. That's all that matters."
Priya S. Verified Review

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Over 600k Happy First or Nothing customers

OneFit® Youve got questions

Any Last Questions?

Here’s everything you need to know.

OneFit® Youve got questions

What's the difference between OneFit® and OneLife™?

OneFit® is your daily all-in-one performance blend. It replaces your protein, creatine, collagen, magnesium, electrolytes, and 16 vitamins and minerals in a single serve.

OneLife™ is our NMN longevity formula, designed to support cellular energy, recovery, and long-term healthspan.

Many of our customers start with OneFit® and OneLife™ as part of their complete health routine.

I already take protein and creatine. Why would I switch?

OneFit® contains clinical doses of both, plus collagen, electrolytes, and vitamins you're probably buying separately.

Most customers switch from 5-7 products and save over $150/month. Same ingredients, fewer tubs, one routine that actually sticks.

I don't train hard. Is OneFit® still for me?

Absolutely. OneFit® isn't just for athletes. The collagen, b-vitamins, creatine, and electrolytes support energy, skin health, gut health, and daily recovery whether you train 7 days a week or just want to feel better with one simple habit each morning.

How do I know your NMN is real?

Every batch of OneLife™ is third-party tested for purity and potency, and we publish the results. 64% of NMN products tested on Amazon contained less than 1% of what was on the label. We exist because that's unacceptable. You can view our testing certificates on the OneLife™ product page.

What does it taste like?

OneFit® comes in Choc, Vanilla or Trop Crush. It's designed to taste good mixed with just water, no blender needed. If you're unsure, our promise guarantee allows you to swap flavours anytime

How long before I notice results?

With OneFit®, most customers notice improved energy and recovery within the first 1 week.

OneLife™ works at the cellular level, so expect sustained energy, better sleep quality, and improved mental clarity within 2-3 weeks of consistent daily use.

This isn't a stimulant. It's compounding.

Is it worth the price?

The average supplement user spends $190-310/month across multiple products.

OneFit® replaces five of those for a fraction of that cost. When you factor in what you're no longer buying, most customers actually spend less with FON than they did before.

Can I take OneFit® and OneLife™ together?

Yes, they're designed to work together. OneFit® covers your daily performance nutrition. OneLife™ supports cellular health and longevity from a completely different angle.

Together, they're the full FON routine. Most customers take OneFit® in the morning and OneLife™ with breakfast. Ease into it to avoid minor GI discomfort.