Medical Reviewer
Dr. Justin Houman, MD
Dr. Justin Houman is a board-certified urologist at Cedars-Sinai specialising in male sexual and reproductive health. He is a co-formulator of JOYMODE's Hard+ and reviews Wellness Desk's sexual-health content for medical accuracy.
Disclosure: Dr. Houman is a co-formulator of JOYMODE Hard+, a product reviewed on this site.
Reviewed for medical accuracy
Endothelial Function: The Cardiovascular Biomarker Nobody Measures
The lining of your blood vessels is a single cell thick and predicts cardiovascular events years ahead. It is also where erectile difficulty and cold hands come from.
Guide · Sexual HealthThe Best Male Wellness Routines After 40
Most "after 40" advice is a list of twenty things. Here are the six that carry the weight, ranked by evidence, plus what to actually buy for each.
Product Review · Sexual HealthJOYMODE Hard+ Review
4 g of L-citrulline, a second nitric oxide pathway, and a fully disclosed label. The dose is the reason to consider it; the daily-use requirement is the reason people abandon it.
Product Review · Sexual HealthBulk L-Citrulline Powder Review
The benchmark that exposes the rest of the category. One ingredient, the clinical dose, about 20 cents a serving — and no reason to buy anything that cannot beat it.
Explainer · Sexual HealthHow Nitric Oxide Actually Produces an Erection
The mechanism in plain language, why it declines with age, and what that does and does not mean about supplements.
Product Review · Sexual HealthJuvenon BloodFlow-7 Review
Real patented ingredients behind a headline statistic that does not mean what the ads imply. The formula is defensible; the "230% nitric oxide" claim is not.
Product Review · Sexual HealthUMZU Redwood Review
Marketed as a nitric oxide booster, and there is not a single nitric oxide precursor in the formula. That is not a nitpick — it is the whole product.
Explainer · Sexual HealthHow Long Should a Blood-Flow Supplement Take to Work?
Longer than the label implies and shorter than "give it a year." Here is what the trials actually measured, and what to check at each point.
Guide · Supplement ScienceSupplement Safety: The Interactions Worth Knowing
Supplements are not inert. These are the combinations that actually send people to hospital, and the ones worth a call to your prescriber.
Ingredient · Sexual HealthL-Citrulline
The one nitric oxide precursor that survives digestion. What it does, the dose the research used, and how to tell a real dose from a decorative one.