"This pre workout is insane! Insane energy, super focussed — my arms were gunna blow up!"
Lock in. Lift heavy. Clinically dosed pre-workout from Stimulus Nutrition.
8,000mg
L-Citrulline
350mg
Combined Caffeine
3,200mg
Beta-Alanine
- Clean pre workout
- Built in the UK
- No filler
- Most-researched supplement
- Unflavoured — mixes with anything
- No proprietary blends
4.9 / 5
80+ verified reviews
UK Free Shipping
On orders over £30
Free Creatine
With every Omnishred order
Clinically Dosed
Every gram on the label
5g
Per single-scoop serving
UK Free Shipping
On orders over £30
Free Creatine
With every Omnishred order
One Ingredient
Nothing else added
The Formula · Per two-scoop serving
What's in every scoop.
No "energy blend". No "5,000mg performance matrix". Every gram of every ingredient is on the label, and every dose is set at the level the actual research uses. Two scoops, 20 minutes before you train.
Per two-scoop serving (24g). Pink Lemonade flavour. Made in the UK. Not for under-18s, pregnant or breastfeeding women.
L-Citrulline
8,000mg
Beta-Alanine
3,200mg
L-Arginine HCL
2,000mg
L-Tyrosine
2,000mg
Acetyl L-Carnitine
1,000mg
Green Tea Extract
500mg
Taurine
500mg
Caffeine Anhydrous
250mg
Di-Caffeine Malate (Infinergy®)
100mg
Potassium Citrate
300mg
The Formula · Per single-scoop serving
One ingredient.
One job.
No buffered nonsense, no creatine HCL markup, no flavour system, no sweeteners. Just the molecule with more peer-reviewed evidence behind it than anything else on the supplement shelf.
Per single-scoop serving (5g). Unflavoured. No fillers, no colours, no sweeteners. Made in the UK.
Micronised Creatine Monohydrate
5,000mg
In the Wild
Real people.
Real workouts.
Tag @stimulusnutritionuk on Instagram to land here.
The Receipts
Our customers
speak for us.
"One of the best pre workouts I've had in a long time — no crash after taking it."
"This is an amazing product! I've tried many preworkouts and this is at the top. Great packaging and arrived very quick."
"I just feel energised and focused. Will be buying again."
The Full Stack
Buy OMNISHRED,
get creatine free.
Every OMNISHRED order ships with a free tub of Essential Creatine — 5g of micronised creatine monohydrate, unflavoured, 50 servings. The pre gets you through the session; the creatine gets you back tomorrow. Add OMNISHRED to your basket and the creatine is added automatically at checkout.
The Backstory
Built because we were tired of flashy labels and underdosed ingredients.
Stimulus Nutrition started in January 2024 with a single question: why is every supplement we buy either lying about its dosing or hiding behind a "proprietary blend"? Eighteen months of formulation later, OMNISHRED launched in October 2025 — clinically dosed, fully transparent, and built for the way we actually train. Two founders, one product line, no shortcuts.
— Reuben & Adnan, co-founders
Read the full story →Questions We Get Asked
The honest answers.
When do I take it?
Two scoops mixed with 300–400ml of cold water, 20–30 minutes before you train. Don't double-scoop in your first session — feel how 350mg of combined caffeine sits with you first.
Will I crash after?
The 100mg of Di-Caffeine Malate (Infinergy®) tails off slowly, so most people don't get the post-pre-workout flatline you might be used to. Reviewers consistently flag "no crash" — but if you're caffeine-sensitive, start with one scoop.
Is it banned-substance-free?
Yes. Every ingredient on the label is permitted under WADA and standard tested-athlete schemes.
What does Pink Lemonade taste like?
Tart, sharp, not too sweet — closer to a real lemonade than the candy-pink alternatives. Reviewers describe it as "unreal taste" and the single most repeated comment is "wish there were more flavours" (next drop tbc).
How long does a tub last?
720g / 24g per serving = 30 servings. One tub is one training month for most people.
Where do you ship?
UK only at the moment. Free over £30, otherwise standard rates calculated at checkout. Orders are processed within 1–2 business days.
Do I need to load?
20g per day for the first 5 days (split across four 5g servings) speeds up muscle saturation. But it isn't required — most people just take 5g per day from day one and reach full saturation within about four weeks either way.
When should I take it?
Anytime. Pre-workout, post-workout, with breakfast — the research is clear that consistency matters more than timing. Just take it every day.
Will it bloat me?
Some people retain a little extra water in the first week — that's the muscle storing more phosphocreatine, which is exactly the mechanism you want. It evens out within a couple of weeks.
Do I need to cycle off?
No. Long-term daily creatine use is well-researched and considered safe for healthy adults. There's no documented benefit to cycling off.
What does it taste like?
Nothing — it's unflavoured by design. Mixes into water, juice, or your pre-workout shaker without altering the taste. Micronised, so it dissolves better than standard monohydrate but doesn't quite go fully clear — that's normal.
How long does a tub last?
250g / 5g per serving = 50 servings. One tub is roughly a seven-week supply at the maintenance dose.