Reishi mushroom
Ganoderma lucidum
Triterpenes + β-glucans with documented immunomodulatory and sleep-architecture effects. Several human RCTs at clinically relevant doses.
8 WATCHING7 CITATIONS
EVERY DOSE PUBLISHED
Every milligram, on the label.
Rōnin - 50 clinically-dosed ingredients. Every batch tested. Every claim referenced.
FREE UK DELIVERY
on subscriptions
THIRD-PARTY TESTED
every batch, published
GMP MANUFACTURED
UK facility
CANCEL ANYTIME
two clicks, honoured
SHOT: RŌNIN POUCH HERO, KITCHEN WORKTOP, SOFT MORNING LIGHT, SCOOP + GLASS
THE FORMULA - V4.1
Rōnin
One 30-day pouch. Fifty clinically-dosed ingredients. The entire label, published to the milligram - because “proprietary blend” is just a way of not telling you.
No reviews yet - we will not fake them
£58.65£69.00/month · save 15%
WHAT RŌNIN ADDRESSES
Seven outcomes.
One formula. Seven systems supported. Each carries the dose the published research used.
"The 2pm crash arrives whatever I eat."
SOUND FAMILIAR? THE FORMULA STARTS HERE.
"I sleep eight hours and wake up tired."
SOUND FAMILIAR? THE FORMULA STARTS HERE.
"My stress baseline crept up and never came back down."
SOUND FAMILIAR? THE FORMULA STARTS HERE.
WELLBEING PARKRUN - AYLESBURYLIFESTYLE PHOTOGRAPHY 3:2
MORNING CALM
DEEP WORK
WHOLE-FOOD PLATE
MIX & GO
WALK TO WORK
CANAL RUN
WELLBEING PARKRUN - AYLESBURY
MORNING CALM
DEEP WORK
WHOLE-FOOD PLATE
MIX & GO
WALK TO WORK
CANAL RUN
THE FIT CHECK - 60 SECONDS - 4 QUESTIONS
Is Rōnin for you?
Four honest questions. If the answer is no, we will tell you no - and why. A supplement you take every day should be a considered decision, and it is not right for everyone.
Start the check
NO EMAIL REQUIRED TO SEE YOUR RESULT
AN HONEST COMPARISON
Compare us. Please.
A transparency brand should welcome the comparison shop. Here it is, with the receipts.
| RŌNIN | AG1 | DIY STACK | |
|---|---|---|---|
| Every dose published | ✓ ALL 50 | ✗ PROPRIETARY BLENDS | ✓ BUT YOU MANAGE IT |
| Clinical doses throughout | ✓ TRIAL-MATCHED | PARTIAL | IF YOU RESEARCH EACH |
| Third-party tests published | ✓ EVERY BATCH + COA | ✗ NOT PUBLISHED | VARIES BY BRAND |
| Active ingredients | 50 | ~75 (DOSES HIDDEN) | AS MANY AS YOU BUY |
| Daily effort | ONE SCOOP | ONE SCOOP | 8-12 PRODUCTS, DAILY ADMIN |
| Price per day | £1.96 | £3.20+ | £3.50-5.00+ |
| Made in | UK - BUCKINGHAMSHIRE | NEW ZEALAND / US | MIXED, PER PRODUCT |
| Pressure tactics | NONE - YOUR CART WAITS | COUNTDOWNS + DISCOUNTS | N/A |
AG1 FIGURES FROM PUBLIC PRICING + LABEL, JUL 2026. DIY = BUYING OUR 8 CORE ACTIVES SEPARATELY AT UK RETAIL.
THE TRANSPARENCY OATH
We publish the milligram.
Every dose declared. Every ingredient in full clinical form. Every batch third-party tested and the certificate published. Every claim referenced to the study behind it. If we change the formula, the changelog says what and why.
Read the oath in full90 SECONDS WITH THE FOUNDERS
Why we built it
VIDEO: FOUNDER FILM - TOM & ASH, 90S, SUBTITLED
“Two dads, one post-natal class, and the same unanswered question: what actually works, at what dose? Nobody would tell us. So we published it ourselves.”
WATCHLIST - LIVE
What we are watching.
Ingredients earning their place in the next Rōnin formula. Screened for UK safety, weighed against the published evidence, judged on brand fit.
LIVE - LAST 12H ACTIVITY
Apigenin
Apigenin
Flavonoid with GABA-A receptor binding affinity; sleep-architecture RCTs are limited but converging. We are looking at the data, not the podcast.
8 WATCHING6 CITATIONS
Quercetin
Quercetin
Highest-evidence flavonoid in the antioxidant category - multiple meta-analyses on blood pressure + inflammatory markers. Bioavailability is the question.
8 WATCHING6 CITATIONS
Cordyceps militaris
Cordyceps militaris
Cordycepin + adenosine derivatives with VO2-max + endurance signal in small human trials. We only evaluate militaris (cultivated, reliable cordycepin content).
8 WATCHING8 CITATIONS
Lion’s mane powder
Hericium erinaceus
Strong mechanistic signal - Hericium erinaceus stimulates nerve growth factor (NGF). Human cognition RCTs are small but consistent. Watching for scale-up trials.
8 WATCHING3 CITATIONS
0 days.
On us, if it fails you.
Take Rōnin for a month. If you cannot feel the difference, email us and we refund your first order in full. No return postage. No questions. No “retention specialist”. The risk is ours - that is what confidence in a formula looks like.
NO RETURN REQUIRED - FULL REFUND - HELLO@KOJO.LIFE - ONE EMAIL
Join the Kōjō notebook
Weekly research notes, formulation decisions, founder letters. No discounts, no noise - we don’t do either.