About
One formula, for both of you
Most of this category sells the same ingredients twice — a version for her, a cheaper one for him, often on two separate websites. We think that is a marketing decision rather than a physiological one.
SIRQULATE exists because the physiology is shared and the market pretends it isn’t.
Blood flow is governed by nitric oxide, and the nitric oxide pathway is present in both bodies. It is the same substrate, the same enzyme, the same effect on the smooth muscle in a vessel wall. There is no biological reason to formulate it twice.
So we make one thing, at doses taken from the published research rather than from a margin calculation, disclose every milligram on the front of the pack, publish the test results for every batch, and let you decide. That is the entire proposition.
For men
Erection quality and stamina are, mechanically, questions about blood flow.What men tend to notice first is not desire. It is that something they never had to think about now takes thinking about.
Erection is a nitric-oxide event. Neurogenic nitric oxide is the principal signal that relaxes the vessels involved, and nitric oxide is built from arginine, which the body makes most efficiently from citrulline taken by mouth. That is why this formula leads with 3,000 mg of pure L-citrulline rather than with arginine, and why it is split morning and evening rather than taken once.The men who write to brands in this category mostly do not describe a mechanical problem. The line that recurs is some version of: I could, I just did not particularly want to. Desire and function are different things, and most of the market only addresses the second.
Worth saying plainly: if the issue is not circulatory, a circulation formula will not fix it. Persistent difficulty is worth a conversation with a doctor, and we would rather say so than sell you something.
For women
Arousal and lubrication are blood-flow events before they are anything else.The same pathway. The same formula. Not a pink version of it.
Genital arousal in women is driven by the same nitric-oxide pathway, and lubrication is a transudate — plasma pushed across the vaginal wall by engorgement, not a secretion from a gland. Roughly 27% of British women aged 55 to 64 report difficulty with it, against 9% in their twenties. It is one of the best-evidenced, least-addressed complaints in the category.The honest counterweight, which we would rather publish than hide: in women, measured genital blood flow and felt desire correlate weakly — far more weakly than in men. Circulation is real, and it is not the whole story. Anyone telling you a capsule resolves desire is selling you something.
The evidence on what actually predicts low desire in women is relational, not hormonal — emotional closeness and mismatched interest outrank age. That is not something a supplement addresses, and we are not going to pretend otherwise.
What we will not do
- Hide a dose inside a proprietary blend or a “complex”.
- Print a number we cannot verify — a harvest altitude, a purity percentage from a cheaper assay, a study we did not run.
- Make it hard to cancel. It is two clicks, with no retention offer.
- Sell you a “his” and a “hers” version of an identical formula.
- Tell you how you will feel. We can only tell you what is in it.