There is a claim making the rounds right now, and it is coming from physicians with real credentials: take Cialis for longevity and to prevent dementia.

It is an appealing story. A drug most men already know, already tolerate, already have a prescription for — and it turns out to also extend your life and protect your brain. Who would not want that?

I want to walk through the actual evidence, because this is a useful case study in something that happens constantly. A drug gets approved for one thing. Observational data hints at benefits somewhere else. That hint travels through social media and arrives on the other side as established fact.

I am 57. I do not have cardiovascular problems, erectile dysfunction, or cognitive complaints. That is not luck, and it is not genetics doing all the work. It is the result of decades of deliberate lifestyle and — just as important — decades of actually looking at my own blood work instead of guessing.

So let me be objective about the drug first. Then let me tell you what I think the higher-leverage play is.

What Cialis is, mechanically

Blocking the breakdown is not the same as building the supply

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Tadalafil is a PDE5 inhibitor. Nitric oxide relaxes the smooth muscle in your blood vessels. Your body then breaks down that downstream signal using an enzyme called phosphodiesterase-5. Tadalafil blocks the enzyme, so the signal lingers and vessels stay dilated.

That is a real mechanism and a genuinely useful drug, with three legitimate FDA indications: erectile dysfunction, benign prostatic hyperplasia, and pulmonary arterial hypertension. I am not anti-medication. I am pro-medication in the right order.

Now notice what the mechanism does not do. It does not increase your nitric oxide production. It slows the breakdown of what you already make.

The cardiovascular data: reasonably strong, but confounded

Where the claim has its best footing

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A systematic review and meta-analysis of 16 studies covering roughly 1.26 million subjects found PDE5 inhibitor use associated with a lower rate of major adverse cardiac events and lower all-cause mortality.

A Swedish cohort published in the Journal of the American College of Cardiology followed 18,542 men with a prior heart attack or revascularization. The results looked like this:

Impressive numbers. Now read what the authors themselves wrote in their conclusion: randomized trials are needed to determine whether this reflects a causal drug effect, or whether PDE5 prescriptions are simply a marker for better socioeconomic status, better medication compliance, younger age, fewer comorbidities, and a healthier lifestyle.

Sit with that for a second. Who fills a Cialis prescription and keeps refilling it? Men who see a doctor. Men who can afford it. Men who take their other medications as directed. Men who are sexually active — and sexual activity itself correlates with cardiovascular fitness. Every one of those variables independently predicts living longer.

The dementia claim: this is where it breaks down

And specifically for tadalafil

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A 2024 meta-analysis pooling six studies and 8.3 million participants found any PDE5 inhibitor use associated with a 47 percent lower Alzheimer's risk. Headline-grabbing. But when you look at which drug drove that signal, it was sildenafil, at a hazard ratio of 0.46. The findings for tadalafil and vardenafil were not statistically significant.

A large UK cohort published in Neurology found the same split: reduced risk with sildenafil, no strong evidence for tadalafil. And when those researchers extended the lag period to three years to account for the delay between symptom onset and diagnosis, the primary finding disappeared entirely.

Then it gets harder for the claim.

So: the highest-dose, longest-exposure population showed nothing. The genetic causal analysis showed nothing. The largest matched cohorts showed nothing. And the specific drug being named in these posts is the one that did not reach significance in the very meta-analysis its supporters cite.

Even the review articles most sympathetic to tadalafil's neuroprotective potential state plainly that current evidence does not support off-label prescribing for dementia prevention.

The side effects that get left out

When a benefit is oversold, the risk profile gets underdescribed

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None of that makes tadalafil a bad drug. It makes it a drug — with a risk-benefit calculation that only makes sense when you actually have the condition it treats.

The part almost nobody talks about

Your smallest arteries fail first

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Erectile dysfunction is the check-engine light for endothelial dysfunction.

The researchers behind that Swedish study said it directly: vasculogenic ED has been proposed as an early manifestation of atherosclerosis that precedes the clinical presentation of coronary artery disease. Your smallest arteries fail first. The heart and brain are running on the same plumbing, just with more margin before you notice.

If you want the outcomes — the years, the cognition, the function at 70 and 80 — you want to be working on why nitric oxide production declined in the first place.

What actually restores endogenous nitric oxide

The foundation, in order of leverage

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Nitric oxide production falls with age, but it falls faster with insulin resistance, visceral fat, elevated homocysteine, oxidative stress, poor sleep, and sedentary living. Every one of those is modifiable, and every one has hard outcome data behind it — not vasodilation surrogates, but actual mortality and cognitive endpoints.

1. Training Resistance work plus aerobic conditioning is the single most powerful upregulator of endothelial nitric oxide synthase available to you. That is not a supplement effect. It is an adaptation.
2. Body composition Visceral fat is metabolically active tissue that drives the inflammation degrading your endothelium. Muscle is the organ of longevity.
3. Diet Nitrate-rich vegetables, adequate protein, minimal industrial seed oil and refined sugar. Leafy greens and beets feed the nitrate-nitrite-nitric oxide pathway directly.
4. Sleep Blood pressure regulation, insulin sensitivity, and overnight vascular repair all depend on it. There is no supplement that replaces it.
5. Targeted supplementation On top of that foundation — chosen based on what your labs actually show you need, not on a category trend.

Where supplements fit, honestly

Precision about what they can and cannot claim

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We formulate supplements. We also want to be precise about the limits, because overselling is exactly the pattern I am criticizing here.

What a well-built formula can do is support the pathway upstream rather than block the enzyme downstream.

That is the logic behind Nitric Supreme. Its anchor is 1,500 mg of Nitrosigine inositol-stabilized arginine silicate — dosed exactly to the clinical literature, where 1,500 mg per day has been shown to raise plasma arginine, serum silicon, and nitric oxide levels, and where it did not elevate heart rate or blood pressure at either 25 minutes or 14 days. We paired that with citrulline and beet-derived nitrates for a second pathway, vitamin C to protect the nitric oxide you make from oxidative degradation, and a methylation block of L-5-MTHF, P5P, and both methyl and adenosyl B12 to address homocysteine — a direct endothelial toxin that most nitric oxide products ignore entirely. That last piece is the difference between a pump product and a cardiovascular product.

Stack them because they address different mechanisms, not because more bottles is better. And if you take blood thinners, blood pressure medication, nitrates, or any prescription that affects circulation, review any nitric oxide product with your prescribing physician before starting. That is not boilerplate. Vasodilatory support can stack with medications that do the same thing.

Which brings me to the actual point

A framework is not a protocol

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Everything above is a general framework. It is not your protocol.

I do not know whether your homocysteine is elevated. I do not know your ApoB, your Lp(a), your hs-CRP, your fasting insulin, your HbA1c, your vitamin D, your testosterone, your thyroid panel, or your omega-3 index. Neither do you, unless you have looked.

That is the thing I would push hardest on. Men will spend money on supplements and prescriptions while flying completely blind on the data that would tell them what they actually need. Cialis for longevity is guessing. A generic supplement stack is guessing. Both are guessing — just with different price tags.

I have been doing this for 33 years, and the pattern is consistent: the men who get durable results are the ones who measure, intervene specifically, and measure again. If you do not know what your blood work says right now, that is where to start — and that is exactly what our lab-based protocols are built to give you.

The bottom line

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Tadalafil is a good drug with three legitimate indications and a well-characterized side effect profile. The cardiovascular association is real but heavily confounded, and the authors of the best study say so themselves. The dementia claim specifically for tadalafil is not supported by the tadalafil-specific data — not by the highest-dose population, not by the genetic causal analysis, and not by the largest matched cohorts.

Meanwhile the interventions with the strongest outcome evidence for both cardiovascular events and cognitive decline remain training, body composition, nutrition, sleep, and correcting the specific deficiencies your own labs reveal.

I am 57, and I am not managing these problems. I am staying ahead of them. That is not a harder path than a prescription. It is just a less convenient story to tell.

Stay Strong,
Dr. Andreas