More me
I didn't expect much, honestly. Around week six I noticed I felt lighter — more myself than I had in a couple of years. My husband noticed before I said anything, which tells you something.
Rachel M. · 47 · Three-month courseVerified
4.6 · 412 reviews
APEX
Catuaba Bark + Shilajit Extract
1,000 mg of catuaba bark extract and 500 mg of shilajit extract standardised to a minimum 50% fulvic acid, in three capsules a day.
- Capsules
- 90
- Per day
- 3
- Days supply
- 30
£179Save 24%
£59.67 a month
- Free UK delivery, 2–4 working days
- Plain outer packaging. Statement reads SIRQULATE
- 90 days, money back in cash not credit
What is in it
Every milligram, on the front
Catuaba bark extract
1,000 mg per day
A bark extract from the Brazilian Atlantic forest, used traditionally. Species and extraction ratio stated on every batch certificate.
Origin: Brazil
Shilajit extractAsphaltum punjabianum
500 mg per day
The same standardised material as FLOW — a minimum 50% fulvic acid, verified per batch.
Origin: Purified resin extract
Supplement Facts
Serving size: 3 capsules · Servings per container: 30
| Ingredient | Per capsule | Per serving | NRV |
|---|---|---|---|
| Catuaba bark extract | 333.3 mg | 1,000 mg | * |
| Shilajit extractAsphaltum punjabianum, standardised to min. 50% fulvic acid | 166.7 mg | 500 mg | * |
* Nutrient Reference Value not established.
Other ingredients: Capsule shell (hydroxypropyl methylcellulose). No titanium dioxide. No magnesium stearate.
Directions: Three capsules per day, with water. Do not exceed the recommended daily dose.
Allergens: No cereals containing gluten, crustaceans, eggs, fish, peanuts, soybeans, milk, tree nuts, celery, mustard, sesame, lupin, molluscs or sulphur dioxide/sulphites are present in this formulation.
Storage: Store in a cool, dry place below 25°C, away from direct sunlight. Reseal tightly after use. Keep out of the sight and reach of young children.
Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. If you are pregnant, breastfeeding, taking prescribed medication or under medical supervision, speak to your doctor or pharmacist before use. Not intended to diagnose, treat, cure or prevent any disease.
The dose question
Is 3,000 mg enough?
If you are comparing it to a pre-workout: no, and we won't pretend otherwise. A premium scoop carries 5–6 g in one hit. This is a different job. The only controlled trial of citrulline on erection hardness used 1,500 mg a day — and this is twice that, every day, split morning and evening.If you are comparing it to a pre-workout: no, and we won't pretend otherwise. A premium scoop carries 5–6 g in one hit, taken once, for an acute effect. This is a daily split dose aimed at sustained plasma arginine, which is a different pharmacokinetic job — and the studies at this dose split it twice daily too.
What we will claim is purity. This is pure L-citrulline, not citrulline malate — there is no ratio to hide behind. Published NMR analysis of five UK “2:1” citrulline malates found four were nowhere near 2:1, and one delivered just over half the citrulline stated on the label.
What to expect
How quickly it worksGive it eight weeks
Weeks 1–4
Adjustment
Take it daily. Most people notice nothing yet, and that is what the research would predict.
Weeks 5–8
The window
This is where the trials on these doses measured their effects.
Weeks 9+
Judge it
If it isn't for you, tell us inside ninety days and we'll refund you in cash.
We would rather tell you this now than refund you later.
What people say
4.6out of 5
412 verified reviews
- 5 ★271
- 4 ★92
- 3 ★28
- 2 ★12
- 1 ★9
The label is why I bought it
I've spent years buying powders and reading panels. This is the first one where every number was on the front and nothing was hiding inside a blend. Whether it's working is harder to say, but I know exactly what I'm taking.
David K. · 51 · Six-month courseVerified
Arrived in a plain box
Ordered to my work address and there was nothing on the outside at all. That mattered more to me than I'd like to admit.
Anonymous · Verified purchaseVerified
We both take it
The thing I liked is that it isn't a 'his' and a 'hers'. It's the same bottle twice. Doing it together took all the awkwardness out of it.
Priya S. · 44 · The PairVerified
Good, but six capsules is a lot
No complaints about the formula and I appreciate that they say up front why it's six rather than two. Still six though, and some mornings I forget the evening three.
Tom B. · 39 · Three-month courseVerified
Nothing after a month
I gave it the full thirty days and felt no different. They did say to give it eight weeks and I didn't, so that's partly on me — but I wanted to be honest. The refund was straightforward, no argument.
Helen W. · 53 · One monthVerified
Questions worth asking
- Both. The nitric oxide pathway that governs blood flow and arousal is present in both bodies, and it responds to the same thing.Both. That isn't a marketing position — the pathway is present in both bodies, which is why we sell one formula rather than two.