In just 12 years, average testosterone in young American men fell by 30%.
Research shows testosterone in American men has been falling for decades.
And it isn't just age. Men in their 20s and 30s today have far less testosterone than their fathers' generation had at the same age, even after accounting for weight and lifestyle factors.1
Chronic stress. Poor sleep. Ultra-processed food. Long days at a desk. Modern life takes its toll on your hormones, and when they're off, you feel it: less energy, less drive, more brain fog. Most men just put it down to getting older.
It doesn't have to be that way. Flint helps your body make more of its own testosterone, with a plan built around you.
Average total testosterone, ng/dL
Sound familiar?
It creeps in slowly, so most men put it down to age, stress or bad sleep. If your energy, mood or drive have been slipping, your levels may be part of the story.
1 in 4men over 30 has low testosteroneAraujo et al., Journal of Clinical Endocrinology & Metabolism, 2007. Prevalence of low total testosterone in men aged 30–79.
Tap any that sound like you.
Not a diagnosis. Only a blood test can tell you your levels.
Why Flint isn’t TRT
Testosterone replacement therapy (TRT) adds testosterone from outside your body. Your brain reads the higher level, decides its own supply isn’t needed, and tells your testes to stand down. That’s how it works, and it’s why coming off TRT is hard and why it can lower sperm count.
Enclomiphene works upstream. It blocks estrogen’s brake on the brain, so the brain sends a stronger signal and your testes make more of their own testosterone.
TRT is FDA-approved. Enclomiphene is not.
Your testosterone signal chainEnclomipheneTRT
The Flint protocol
Enclomiphene does the work on testosterone. Low-dose tadalafil increases blood flow when you’re aroused. Low daily dose, no timing. Both come in one plan, one box and one monthly price, if your clinician decides they’re right for you.
Compounded by [Pharmacy name], a licensed 503A pharmacy.
PrimaryFor testosterone
25 mg · one tablet a day
SupportFor ED
5 mg · one tablet a day, if prescribed
Low dose. Every day. No timing.
Daily tadalafil, if prescribed, reaches steady levels within the first week, so there’s nothing to time. Testosterone takes weeks to move.
Enclomiphene raises the signal to make testosterone. A follow-up blood test checks your response.
With levels in range, energy, drive and focus often follow. Individual results vary.
Day 0 to 3 months
Pick a stage, then an outcome, to see how it changes as your levels come back up.
Illustrative. Individual results vary.
Members
Change comes in a familiar order: energy first, then drive, then the body. Here’s where three members started, and where they got to.
Before
Month 5“By week six I’d dropped the 3 p.m. coffee and was back lifting before work. I didn’t realise how flat I’d been.”
Before
Month 7“I wanted to stay off injections and keep things simple. Two tablets, a blood test, and my weekends are mine again.”
Before
Month 6“We’re trying for a second kid, so TRT was out. Flint got my levels up without touching my fertility.”
Individual results vary and these are not typical of every member. Members shown gave written consent and [were / were not] compensated for sharing their story.
Your clinicians
Every Flint plan is written and reviewed by a US-licensed physician who reads your bloodwork, not a script.
Your numbers set the dose. Nothing else.
Most men I see aren’t broken. They’re under-measured.
You shouldn’t have to choose between energy and a family.
Placeholder: AI-generated photos, sample quotes and sample lab values, for layout only. Swap in real members (written consent, compensation disclosed) and your real prescribers before launch. Before-and-after claims need substantiation.
Flint vs the alternatives
TRT swaps your own testosterone for a substitute. Supplements promise a lot and prove little. Flint helps your body do the job itself, with low-dose tadalafil in the same plan.
| FlintEnclomiphene + tadalafil · daily tablets | TRTTestosterone replacement · injections or gels | SupplementsTestosterone boosters · over the counter | |
|---|---|---|---|
| Works with your body’s own testosterone | Yes: Helps your body make more of its own | No: Replaces it. Your own production shuts down | Partly: Claims to, with little good evidence |
| Sperm counts held in trial | Yes: Stayed in normal range1 | No: Can lower sperm count | Partly: Unproven |
| Clinically studied to raise testosterone | Yes: Mean 253 → 604 ng/dL in 6 weeks | Yes: Yes | No: Mostly not |
| Daily low-dose tadalafil in the same plan The Flint difference | Yes: Included. One plan, one price | No: Separate prescription, if offered | No: No |
| No timing | Yes: Low daily dose, ready any time | No: Not part of TRT | No: No |
| Blood test before you start | Yes: Included | Yes: Usually | No: No |
| Prescribed and monitored by a clinician | Yes: Yes, throughout | Yes: Yes | No: No oversight |
| No needles, no gels | Yes: Two daily tablets | No: Injections or gels | Yes: Capsules |
Draft for review. Every claim in this table needs clinical and legal sign-off before launch, and comparative claims need evidence on file.
How it works
Everything happens online and at home. No waiting rooms, no clinic visits, and a real clinician at every step.
Answer questions about your symptoms, health and goals. No appointment needed.
We send a finger-prick blood test kit. You can also visit a local lab or upload recent results.
A licensed US clinician reviews your results and history and, if it’s right for you, prescribes your plan.
Tablets arrive in discreet packaging. A follow-up blood test at about 6 weeks lets your clinician fine-tune your dose.
Message your care team any time, at no extra cost.
Studied, not hyped
Enclomiphene raised mean morning testosterone
דIt’s a serious area of discussion.”
1 Wiehle et al., BJU International, 2013 · 2 Kloner et al., Clinical Cardiology, 2024 · 3 Jehle et al. and Kloner, as reported by NPR, Aug 2026
Study results are averages from the study populations. Individual results vary. Tadalafil is not approved to prevent heart disease, stroke or dementia. Draft: confirm every figure against the source papers, and get regulatory review of the heart and brain claims, before launch.
Pricing
If your clinician prescribes both, one plan, one box, one price. Your clinician and your blood tests are included.
The Flint protocol
Compounded medications. Not FDA-approved. If your clinician decides not to prescribe, you won’t be charged for medication and any amount paid for it is refunded in full. [Refund rule for the consultation and blood test]
FAQ
Can’t find what you’re looking for? Our care team answers every message.
Contact supportEnclomiphene citrate is an oral prescription medicine. It blocks estrogen’s feedback on the hypothalamus and pituitary, which raises LH and FSH, the hormones that tell your testes to make testosterone. It helps your body make more of its own, rather than replacing it.
TRT adds testosterone from outside the body. That can raise your levels, but your body reads the higher level and dials down its own production, which can lower sperm count and makes stopping hard.
Enclomiphene works upstream, so your own production keeps going. If your clinician prescribes it, your plan can also include low-dose daily tadalafil for ED.
Tadalafil treats erectile dysfunction: it increases blood flow when you’re aroused. At a low daily dose (5 mg) it keeps steady levels, so there’s nothing to time. It’s only in your plan if your clinician prescribes it.
Tadalafil is approved for erectile dysfunction and for symptoms of an enlarged prostate. If it isn’t right or safe for you, your clinician can prescribe enclomiphene on its own.
Tadalafil is not approved to prevent heart disease or extend life. Here is what research has found so far.
In insurance-claims records, 8,156 men taking tadalafil had a 55% lower rate of cardiovascular death and a 44% lower rate of death overall than 21,012 matched men who weren’t.6 A separate analysis of more than 500,000 patients linked tadalafil with a 32% lower risk of dementia.5
These are observational studies. They show a link, not proof that tadalafil caused the difference, and randomized trials are still needed. Flint prescribes tadalafil only for ED, and only if your clinician decides it’s right for you.
Enclomiphene is designed to keep your own production going. In clinical studies, sperm counts stayed in the normal range on enclomiphene, while they fell on testosterone gel. If you’re planning children, tell your clinician so they can plan around it.
Tadalafil can work within hours of a dose, and daily use reaches steady levels within the first week. Testosterone typically rises over the first few weeks; in one study, mean levels more than doubled by week 6. Energy, mood and drive often follow over 2–3 months. Everyone is different, and individual results vary.
Yes. Every plan starts with one, so your clinician can see your testosterone and other markers before prescribing anything. We send an at-home kit, or you can use a local lab or upload recent results. A follow-up test at about 6 weeks checks how you’re responding.
Enclomiphene can cause headache, hot flashes, nausea and mood changes and, rarely, vision changes or blood clots. Tadalafil can cause headache, indigestion, back pain, muscle aches, flushing and a stuffy nose. Your clinician monitors you throughout. See the Important Safety Information below.
No. Enclomiphene is not FDA-approved. Flint’s medicines are prepared by licensed US compounding pharmacies under a clinician’s prescription. Compounded medications are not reviewed by the FDA for safety, effectiveness or quality.
Never take tadalafil with nitrates (such as nitroglycerin) or riociguat. Together they can cause a sudden, dangerous drop in blood pressure. Tell your clinician about everything you take, including alpha-blockers, other blood pressure medicines and supplements.
Plans start at $99 a month on a 12-month plan, with your clinician, both medicines, blood tests and shipping included. You can cancel any time.
Enclomiphene citrate is not FDA-approved. It is prepared by a licensed US compounding pharmacy under a prescription from a licensed clinician. Compounded medications are not reviewed by the FDA for safety, effectiveness or quality.
Do not take enclomiphene if you have liver disease, an uncontrolled thyroid or adrenal condition, a pituitary tumor or other brain lesion, or a history of blood clots.
Possible side effects include headache, hot flashes, nausea, dizziness, mood changes and breast tenderness. Rarely, enclomiphene can cause blurred vision or other visual changes (stop taking it and contact your clinician), a raised red blood cell count, or blood clots. Your clinician will monitor your blood work.
Do not take tadalafil if you take nitrates (such as nitroglycerin, or “poppers”) or riociguat, or if you are allergic to tadalafil. Together they can cause a sudden, dangerous drop in blood pressure. Tell your clinician if you have heart problems, as sexual activity may not be safe for you. Use caution with alpha-blockers and other blood pressure medicines, and limit alcohol.
Common side effects: headache, indigestion, back pain, muscle aches, flushing, and a stuffy or runny nose.
Get emergency help for:
Draft summary. Final Important Safety Information must be approved by Flint’s medical director and legal counsel.
Ready when you are
It starts with a 2-minute assessment and a blood test you can do at home.
Compounded by [Pharmacy name], a licensed 503A pharmacy.