Free shipping to AU · USA · NZ · UK 90-day money-back guarantee Cancel or pause anytime Australian made, batch tested Free shipping to AU · USA · NZ · UK 90-day money-back guarantee Cancel or pause anytime Australian made, batch tested Free shipping to AU · USA · NZ · UK 90-day money-back guarantee Cancel or pause anytime Australian made, batch tested

4.8 stars 2.1K reviews 500K+ members

Everyone’s talking about hot flushes. Nobody’s telling you about the muscle you’re losing.

That’s the change nobody warned you about, and it’s the one you can actually do something about. OneFit® is one sachet a day with everything that muscle needs to stay.

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A OneFit member in her fifties standing at a bright kitchen bench beside a prepared chocolate drink and a OneFit sachet, with the figure 91% reported more visible muscle definition, self-reported over 12 weeks.
12-week controlled study by TYGA, 750+ participants, June–August 2025. Results not typical.
01

Sold as a hormone story. The part that changes is tissue.

Hot flushes, sleep, mood. That is the conversation, and it is real. Underneath it, lean mass falls while fat rises and recovery stops keeping pace. That is not effort failing you. It is tissue, and tissue you can feed.

A woman lying awake in bed at night, overheated and unable to sleep, beside two callout cards contrasting the conversation people have about menopause - hot flushes, sleep, mood - with the one nobody starts: lean muscle quietly leaving.
02

Same food. Same workouts. Different body.

As oestrogen drops, your body starts swapping muscle for fat, and the muscle you lose was holding your shape and burning your calories. Keeping it takes more protein than it used to, so OneFit® puts 25g in one daily sachet.

Two line charts: oestrogen sloping downward, and what you need to eat sloping upward.
03

More protein needed. Less appetite to eat it.

That’s the trap of your 40s and 50s: the target goes up while the plate gets smaller. OneFit® solves it in one sachet, 25g of protein for 100 calories, no bigger meals required.

Two cards over a plate of whole food: the protein target rising, appetite to eat it falling.
04

Stop paying for a sprinkle of collagen.

Most tubs give you a few grams, a dose picked to fit on the label rather than to work. OneFit® gives you 25g every day, and it doubles as your protein, so you can throw the beauty tub out.

An ordinary supplement tub labelled a few grams beside a OneFit sachet labelled 25g.
05

Two things every woman over 40 should be taking. Zero of them are in her cupboard.

Creatine at 5g and magnesium at a real dose are two of the best-supported ways to hold onto muscle, and neither is sold to women. OneFit® has both in one sachet, with your protein, so you don’t have to go and buy them.

A stat grid beside a OneFit sachet: 25g protein, 5g creatine, 181mg magnesium and 16 vitamins and minerals per 35g serve.
06

Lift twice a week. We’ll cover the rest.

Muscle after 40 takes two things, resistance training and enough of the right nutrition, and only one of them fits in a sachet. OneFit® is that one: 25g protein, 5g creatine, magnesium and 16 vitamins and minerals for 100 calories a day.

A woman lifting a dumbbell beside a card reading no supplement replaces lifting; it covers the nutrition half of the same job.
07

What the next 12 weeks actually look like.

Energy steadies, your stomach settles, then week 12 shows you what you’ve been working for. 750+ women went through it in the study, and nearly all reported that exact order.

A rising curve marking week 4 energy and recovery steady, week 8 less bloat, week 12 definition is clearer.

Your entire stack.
One sachet.

  • A OneFit member in her fifties laughing in a sunlit kitchen, holding a glass of prepared chocolate drink.
  • What 750+ OneFit customers experienced: 91% more visible muscle definition, 98% felt leaner in waist, face and overall, 87% less bloat and calmer gut, 62% clearer head and energy
  • 12-week clinical results. Real body composition changes: one member photographed before and after, marked +2.4kg lean muscle, 9% strength gain and −5.4% body fat
  • A OneFit sachet being slipped into the side pocket of a pair of leggings
  • A OneFit Chocolate Milkshake sachet being poured into a glass of water
View the full supplement facts

31 ingredients in 1 sachet

  • 20bn CFU probiotics one named strain, L. paracasei, for a settled gut
  • 25g hydrolysed collagen protein for lean mass and recovery
  • 1g quad-electrolytes for hydration
  • 5g European creatine monohydrate for strength and training output
  • 13 vitamins & minerals at 100 calories and 0g fat, in one 35g sachet

500,000+ members 2.1K reviews

OneFit®: 31 ingredients.
One sachet.

31 post-workout essentials in a single 35g serve, built around lean mass and the metabolism that carries it.

1 · Choose your format
2 · Choose your flavour

Don’t love it? Swap flavours within 24 hours, guaranteed.

3 · Pick your supply
Your selection
Price
Works out to
  • 90-day money-back guarantee
  • Free shipping to AU · USA · NZ · UK
  • Australian made, batch tested

Prices in AUD · Final price and offers confirmed at checkout.

Save money and time, with all eight essentials in one place.

The same eight things, bought separately, every month.

The OneFit Chocolate Milkshake carton with single-serve sachets and a prepared chocolate milkshake saved a year,
roughly

If you bought them individually

  • Protein powder79
  • Creatine49
  • Electrolytes39
  • L-Carnitine29
  • BCAAs29
  • Multivitamins59
  • Probiotics49
  • Magnesium39
Bought separately /day
OneFit®, 30-day supply /day
Annual saving, roughly /year

90-Day Money-Back Guarantee

“OneFit replaced six supplements I had in my cupboard…”

Jake R., Verified Member

Over 500k Happy OneFit Customers

A OneFit Chocolate Milkshake sachet being poured into a glass

Trusted daily by 500,000+ members.

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  • Every batchthird-party lab tested

Quality you can trust.Australian made, third-party tested every batch.

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4.8/5.0 rating · 2.1K reviews

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The questions everybody asks.

Is creatine safe long term? What about my kidneys?

Creatine monohydrate is one of the most heavily studied supplements in existence. Across controlled trials, adverse events have been mild and comparable to placebo, and kidney markers unchanged.

That said, if you have existing kidney disease or take medication that affects kidney function, this is a question for your doctor rather than a product page.

Will it help my bones?

No, and we would rather say so plainly, because a great deal of menopause marketing implies otherwise.

Trials that measured bone mineral density alongside creatine and resistance training found no reliable increase from the supplement. Bone density belongs to the training argument, not to this sachet. If bone is your concern, that is a conversation for your GP.

I’ve never lifted weights. Is it too late to start?

No. Trials in this age group routinely recruit women with no training history, and resistance training produces measurable strength gains well into later life. That is one of the better-established findings in the field. Two sessions a week is the figure the evidence keeps landing on, not five.

Start with something supervised if you can. Two sessions a week is the figure the evidence keeps landing on, not five.

Why is there protein in a product aimed at menopause?

Because it is the part that actually matters, and because the creatine result above assumes you are eating enough of it.

Protein requirements rise with age while most women’s intake does not. A serve here is 25g at 100 calories, which is a straightforward way to close part of that gap on days when cooking a high-protein meal is not happening.

How much is in OneFit®, and how do I take it?

25g of protein and 5g of creatine monohydrate per 35g serve: one sachet or one scoop, shaken into 300ml of water. One serve daily. Creatine works by saturating over time, so taking it every day matters more than when you take it.

When should I take it?

Whenever you’ll actually remember it, at the same time each day. Daily consistency matters more than perfect timing. A serve taken every day beats a better-timed one taken twice a week. If you train, after training is a sensible anchor.

Who is it for?

People who train at least a few times a week and want one daily serve covering protein, creatine, electrolytes, probiotics and micronutrients instead of managing four or more separate products. It isn’t a weight-loss product and it isn’t a replacement for meals.

How does it fit into a daily routine?

It replaces the stack rather than adding to it. One sachet after training covers what most people were buying as four separate tubs. The formula is built around lean mass and probiotic among them. The gut ingredient is a named strain at a printed count sitting beside 25g of protein and 5g of creatine, rather than being sold on its own.

What if I don’t like it?

You’re covered by a 90-day full refund guarantee, and you can cancel or pause a subscription at any time. If it’s the flavour rather than the formula, the flavour promise lets you swap within 24 hours.

Why First or Nothing
No proprietary blends
Every amount is printed and verifiable. 20 billion CFU of Lactobacillus paracasei is on the sachet itself, named to the species, not buried inside a blend.
Third-party lab tested, every batch
Not once at launch. Every batch, with results published.
Australian made
Premium ingredients, made transparently in Australia.
Versioned, not fixed
The formula is reviewed and updated as new science emerges. Currently supplying OneFit® v4.7.
No gums, oils or harmful additives
And nothing included at a dose too small to do anything.
Ingredients & allergens

Per 35g serve: hydrolysed bovine collagen protein, micronised creatine monohydrate, L-carnitine tartrate, BCAA 2:1:1, glycine, magnesium citrate, potassium citrate, sodium chloride, turmeric extract, Lactobacillus paracasei, plus 13 vitamins and minerals, natural flavouring and sweetener.

Gluten: nil detected. Not intended for children, or for anyone pregnant or nursing, without medical advice.

Science & testing

Third-party lab tested every batch, with results published. Made in Australia to premium ingredient standards. The formula is versioned and revised as evidence develops. The current supply is v4.7.

Doses are set at amounts intended to be meaningful rather than label-filling: 20 billion CFU of Lactobacillus paracasei, 25g protein, 5g creatine monohydrate and 1g of elemental electrolytes per serve.

Directions

Take one serve daily, after training. Blend or shake one 35g sachet (or one scoop) into 300ml of water or a beverage of your choice. On rest days, take it at the same time each day.

How to prepare OneFit: one sachet shaken into 300ml of water
Full supplement facts

Per 35g serve (1 sachet or 1 scoop), Chocolate Milkshake. 20 servings per package.

OneFit supplement facts per 35g serve
Energy420kJ / 100kcal
Protein25.0g
Fat, total0.1g
Carbohydrates0.5g (sugars 0.1g)
Creatine monohydrate5.0g
L-Carnitine tartrate1.0g
BCAA (2:1:1)1.05g
Glycine1.0g
Magnesium181mg
Sodium294mg
Potassium139mg
Probiotics (L. paracasei)20 billion CFU
Vitamins & minerals13, incl. B12 1100% DV, biotin 317%, vitamin E 230%

Percentage daily intakes are based on an average adult diet of 8700kJ. Batch tested between 100–105 calories.

Not a replacement for lifting.
A replacement for eight tubs.

25g of hydrolysed collagen protein, 5g of creatine monohydrate and 181mg of magnesium per serve, at 100 calories. Every amount printed on the sachet.

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