Best Tea for Testosterone in Your 40s: What Actually Works After 40

What's Actually Happening to Your Testosterone After 40

Here's the version you've probably heard. Testosterone drops 1% a year after 40. Everyone repeats it. It's mostly wrong.

The actual research is more interesting. A 2014 study pooled data on thousands of men and found that testosterone peaks at around age 19, drifts down to a steady level by 40, and then doesn't really drop much further if you're healthy.¹

What changes after 40 isn't average testosterone. It's the gap between guys who hold their levels and guys who lose them.

The biggest study on this in Europe (called EMAS, 3,220 men aged 40-79) found something most "low T" marketing won't tell you. Only 0.1% of men in their 40s actually have clinical low testosterone.² The Mayo Clinic puts it plainly: most older men still test within the normal range, and only 10-25% of older men have levels considered low.³

That number climbs as men get older. But it never gets close to the "every man's hormones are dying" panic the supplement industry sells.

So if you're 43 and feel flat, the question isn't "are my hormones doomed?" It's what's quietly draining them?

The teas below work on those four things. Not on your testicles directly. That's the right way to think about it.

Each of these is well documented. The sleep finding (one week of short nights drops daytime T by 10-15%) comes from a JAMA study at the University of Chicago.⁴ The visceral fat to estrogen conversion is established endocrinology that's referenced in standard clinical practice guidelines.¹²

For the full breakdown of foods that quietly tank your T, see our guide on the 7 foods that contribute to low testosterone.

The 4 Teas Worth Drinking After 40

Tea	What It Does	Best For
Ashwagandha	Drops cortisol so T can climb	Stressed, fatigued, bad sleep
Fenugreek	Blocks the enzymes that drain T	Men 40+, low libido
Ginger	Better blood flow, less oxidative stress	Active men, fertility focus
Green Tea	Cuts the belly fat that's bleeding T	Soft middle, metabolic drift

1. Ashwagandha: The Best-Studied One

If you only added one thing to your routine after 40, this is it.

A 2023 study put a group of stressed, overweight men on either ashwagandha or a placebo for 12 weeks. The ashwagandha group came out the other side with measurably higher free testosterone, less stress, and less fatigue.⁵

The NIH's Office of Dietary Supplements summarizes the broader evidence: multiple clinical trials show ashwagandha supplementation can support testosterone and sexual function in aging men, particularly those under stress.⁶ And a 2021 systematic review named ashwagandha the most evidence-backed herb for raising testosterone in men.⁷

How it works, in normal English: ashwagandha brings cortisol down. Cortisol is your stress hormone. When it's high all the time (kids, mortgage, work, sleep debt), it shuts down your testosterone production. Drop cortisol, and your body has room to make testosterone again.

That's why ashwagandha works best in stressed, fatigued, poor-sleeping guys. If you're 35, sleep 8 hours, and your cortisol is fine, ashwagandha won't do much. If you're 45 and running on fumes, different story.

How to drink it: A blend with ashwagandha root brewed daily. About a teaspoon per cup, steeped 5-7 minutes.

TFG's Vitality Blend has ashwagandha as its anchor herb. Easiest way to get a clinical dose without measuring anything yourself. For the deeper dive on this herb specifically, see our complete guide to ashwagandha.

The honest part: Ashwagandha tea is gentler than the capsules used in those studies. The research uses concentrated extracts at 300-600 mg. Tea works, but slower and more subtly. That's a feature for a daily ritual. You can drink it every day without overdoing it.

2. Fenugreek: The One Most Guys Skip

Fenugreek is the most interesting herb in the "guys over 40" research right now. Because the studies actually use guys over 40 (most testosterone studies use 20-somethings).

A 2024 study put 95 men aged 40-80 on a fenugreek extract for 12 weeks.⁸ The result: plasma testosterone went up about 13%. Free testosterone climbed 16%. Salivary testosterone (the easiest one to measure naturally) jumped 31%.

A 2020 review of four other studies reached the same conclusion: fenugreek raises testosterone, modestly but consistently.⁹

How it works, in plain English: fenugreek blocks two enzymes that drain testosterone in older men.

One converts testosterone into estrogen. That enzyme gets more active as belly fat increases, which is why men in their 40s are particularly vulnerable to it.

The other converts testosterone into DHT, which is involved in prostate enlargement and hair loss.

So fenugreek isn't making more testosterone. It's stopping the leaks. For aging men, that's actually more practical.

How to drink it: Cracked fenugreek seeds, simmered in water for 5-10 minutes, one teaspoon per cup. Slightly bitter. Pairs well with honey and lemon. Or as a standardized extract if you want the easier route.

Heads up: Fenugreek is not in TFG's Vitality blend. We're telling you about it because it's good, not because we sell it. Add it to your routine separately. Pairs well with Vitality. Doesn't replace it.

3. Ginger: The Underrated One

Ginger doesn't have the marketing machine that ashwagandha does. But the research on ginger for male hormones is real and quietly impressive.

A 2018 review pulled together the human and animal studies and found ginger linked to higher testosterone, better sperm count and motility, and less oxidative damage to the cells that produce testosterone.¹⁰ Effects are biggest in men with fertility issues or oxidative stress. Two things that become more common after 40. The Cleveland Clinic credits ginger's active compounds (gingerols) with potent anti-inflammatory and antioxidant effects, which is the mechanism doing the heavy lifting here.¹¹

How it works: Two things.

One, ginger's anti-inflammatory. It protects the Leydig cells (the cells in your testicles that make testosterone) from oxidative damage.

Two, ginger improves blood flow. Including down south. Which matters for testicular function and erection quality.

Bonus: ginger is one of the seven herbs in TFG's Vitality Blend, alongside ashwagandha, horny goat weed, turmeric, saw palmetto, rooibos, and chai. You're already getting it if you drink Vitality.

How to drink it solo: Fresh ginger, about 2 cm of root, sliced and simmered for 10 minutes. Add lemon and honey.

4. Green Tea: For Everything Around Testosterone

This one's different. Green tea doesn't directly boost your testosterone. It removes the thing that's bleeding it out.

After 40, the biggest predictor of falling testosterone isn't age. It's body composition.

Visceral fat (the fat around your organs) is hormonally active. It produces an enzyme that converts your existing testosterone into estrogen. The more visceral fat you carry, the more T leak. Insulin resistance makes it worse.

Green tea's catechins (especially EGCG) have multiple studies showing modest but real effects on body fat, insulin sensitivity, and metabolic markers. For a guy in his 40s, that's not a direct T boost. It's removing the thing that's draining T in the first place.

How to drink it: Real green tea (sencha, gyokuro, matcha), 2-3 cups daily. Brewed at 80°C (175°F) for 2-3 minutes. Don't pour boiling water on green tea. You'll burn the leaves and ruin the catechins.

Heads up: Green tea isn't in Vitality. It's the base of TFG's Fasting Blend. If you're already running intermittent fasting or trying to drop the gut, Fasting Blend gives you green tea plus four other metabolic herbs in one cup.

The Actual Daily Protocol

Here's the mistake most guys make. They treat these like supplements. Take one capsule. Wait for magic. Get disappointed. Give up.

The right way is to build it into your day as a routine.

When	What	Why
Morning	Vitality Blend	Cortisol regulation, circulation, prostate support
Mid-morning	Green tea, brewed properly	Catechins for metabolic support, mild caffeine
Evening (optional)	Fenugreek tea or extract	Block the T-to-estrogen leak, support free T

Three cups across a day. No prescription. No clinic. No Instagram "testosterone optimizer" stack at $300 a month.

But here's the truth: the teas are a supporting protocol, not the protocol itself.

If you're sleeping 5 hours, drinking 4 nights a week, sitting all day, and carrying 30 pounds you shouldn't be carrying, the tea isn't going to fix you.

The lifestyle stuff (sleep, training, body composition) does 80% of the work. The teas earn the last 20%. Which is the difference between feeling okay and feeling sharp.

For the bigger picture on how tea fits into men's hormonal health overall, see our complete guide to tea for men.

When to Stop Drinking Tea and Go See a Doctor

Tea isn't a substitute for testing.

If you have any of these going on, get bloodwork done:

• Months of fatigue, not weeks
• Morning erections gone
• Significant weight gain around the middle for no reason
• A drop in libido that's affecting your relationship
• Brain fog that isn't explained by sleep

You're looking at total testosterone, SHBG, LH, and free T. The clinical line for low T is usually below 300 ng/dL on two morning measurements per Endocrine Society guidelines.¹²

If you're below that, no tea is going to fix it. That's a conversation with a doctor about TRT.

If you're above 300 and still feel off, that's exactly where this protocol earns its keep. For the full picture, see our complete guide to tea for testosterone support.

FAQ

Does drinking tea actually raise testosterone, or is this marketing?

For ashwagandha, fenugreek, and ginger: yes. But modestly. And mostly in men whose T is being suppressed by something fixable (stress, sleep debt, oxidative stress). Effect sizes in the studies are 10-15% increases in free testosterone. Not 50%. The honest framing is "moves the needle if you're sub-optimal." Not "rebuild yourself with a teaspoon."

How long until I notice anything?

The clinical trials run 8-12 weeks. Subjective changes (energy, libido, sleep quality) often show up in 2-4 weeks. Hormonal blood changes take longer to register. Give a protocol 90 days before judging.

Is this safe with other supplements or medications?

Ashwagandha can interact with thyroid medications and sedatives. Fenugreek can lower blood sugar (relevant for diabetics) and thin the blood mildly. Ginger and green tea are food-safe at culinary doses. If you're on prescription medications, especially blood pressure, blood sugar, or hormonal medications, run this past your doctor.

Can I just take supplements instead of brewing tea?

You can. The advantage of tea is dose moderation (it's hard to overdo), the daily ritual (consistency is what produces results), and the synergy of brewing multiple ingredients together. Capsules work. They're just more transactional. And in real life, less consistent.

What if I'm under 40?

The protocol still works. But the effect sizes are likely smaller. These herbs mostly help men whose T is being suppressed by lifestyle factors. Younger, healthier men often have less to fix. The exception: men with high stress, poor sleep, or metabolic issues at any age will see meaningful benefit.

The Bottom Line

If you're a guy in your 40s, the best tea for testosterone isn't a single brew. It's a daily protocol.

Ashwagandha for stress. Fenugreek for the leaks. Ginger for circulation. Green tea for everything around it.

TFG's Vitality Blend is the morning anchor. Ashwagandha and ginger plus four other men's herbs in one cup. Pair it with green tea later. Add fenugreek if you want to push further. Run it for 90 days. You'll know.

Sources

A mix of peer-reviewed clinical research, professional medical society guidelines, and trusted institutional health resources (Mayo Clinic, NIH, Cleveland Clinic, University of Chicago Medicine).

1. Kelsey TW, Li LQ, Mitchell RT, et al. A Validated Age-Related Normative Model for Male Total Testosterone Shows Increasing Variance but No Decline after Age 40 Years. PLOS One. 2014;9(10):e109346. PubMed
2. Wu FC, Tajar A, Beynon JM, et al. Identification of late-onset hypogonadism in middle-aged and elderly men (European Male Ageing Study). N Engl J Med. 2010;363(2):123-135. PubMed
3. Mayo Clinic Staff. Male menopause: Myth or reality? Mayo Clinic, Men's Health. Updated 2025. Mayo Clinic
4. University of Chicago Medicine. Sleep loss lowers testosterone in healthy young men. Summary of Leproult & Van Cauter, JAMA 2011. UChicago Medicine | Original study: PubMed
5. Smith SJ, Lopresti AL, Fairchild TJ. Exploring the efficacy and safety of a novel standardized ashwagandha root extract in adults experiencing high stress and fatigue. J Psychopharmacol. 2023;37(11):1091-1104. PubMed
6. National Institutes of Health, Office of Dietary Supplements. Ashwagandha: Is it helpful for stress, anxiety, or sleep? Health Professional Fact Sheet. Updated 2023. NIH ODS
7. Smith SJ, Lopresti AL, Teo SYM, Fairchild TJ. Examining the Effects of Herbs on Testosterone Concentrations in Men: A Systematic Review. Adv Nutr. 2021;12(3):744-765. PubMed
8. Lee-Ødegård S, Gundersen TE, Drevon CA. Effect of a plant extract of fenugreek on testosterone in blood plasma and saliva: a double blind randomized controlled intervention study. PLOS One. 2024;19(9):e0310170. PubMed
9. Mansoori A, Hosseini S, Zilaee M, Hormoznejad R, Fathi M. Effect of fenugreek extract supplement on testosterone levels in male: A meta-analysis of clinical trials. Phytother Res. 2020;34(7):1550-1555. PubMed
10. Banihani SA. Ginger and Testosterone. Biomolecules. 2018;8(4):119. PubMed
11. Cleveland Clinic. Health Benefits of Ginger. Health Essentials. Cleveland Clinic
12. Bhasin S, Brito JP, Cunningham GR, et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab. 2018;103(5):1715-1744. PubMed