How It Works
Benefits
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FAQs
How It Works
Benefits
Reviews
Ingredients
Guarantee
FAQs
4.8 |
1,000+ Customer Reviews
High Testosterone Is Not Enough...
4.8 |
1,000+ Customer Reviews
High Testosterone Is Not Enough...
Most men focus on raising testosterone — but ignore estrogen. Longevity by Science supports both, restoring healthy hormone balance for steadier energy, sharper focus, and renewed drive — naturally.
Clinically Dosed Ingredients
Dual-Action Hormone Support
Feel the Difference in Weeks
Third‑party
tested
HSA/FSA
Eligible
90-Day Money
Back Guarantee
FREE Shipping With Subscriptions
If you’re just not feeling like yourself, it’s not low testosterone alone.
Afternoon crashes and sluggish energy
Softer midsection, stubborn bloating
Labs say “normal,” but you don’t feel normal
Mood & drive aren’t what they used to be
Recovery is slower, sleep is hit or miss
Most boosters only crank testosterone up. But testosterone doesn’t work alone — it’s part of a delicate hormonal feedback loop.
When estrogen levels drift too high or too low, even men with “great” testosterone numbers can feel terrible, because testosterone’s effects depend on balance, not just quantity.
Longevity by Science supports both sides of the equation — boosting natural T while optimizing estrogen metabolism — so your energy, focus, and mood stay steady throughout the day.
Most men focus on boosting T—and ignore estrogen balance.
Even when T levels look great on paper, sluggish estrogen metabolism can leave you tired, foggy, and frustrated. Longevity by Science solves that — supporting both sides of your hormonal seesaw.
Longevity by Science has built the dual-action formula
Studies show nutrients and adaptogens like KSM-66® Ashwagandha, LJ100® Tongkat Ali, and PrimaVie® Shilajit support healthy testosterone production and signaling - without system suppression.
Compounds like DIM and Boron support healthy estrogen clearance pathways to ensure testosterone is working for you at the cellular level, not being converted into unwanted metabolites.
How The Formula Works
Boost Testosterone Production
Clinically studied adaptogens boost natural testosterone production
Optimize
Estrogen Metabolism
DIM & Boron optimize estrogen clearance for a balanced T:E ratio
Boost Testosterone Production
Clinically studied adaptogens boost natural testosterone production
Optimize Estrogen Metabolism
DIM & Boron optimize estrogen clearance for a balanced T:E ratio.
When both sides of the hormonal seesaw stay balanced, everything clicks — steadier energy, better body composition, revived libido, and a sharper mind.
This makes the difference between just raising T… and feeling like yourself again.
What Balanced Hormones Actually Feel Like
Unlike generic boosters, Longevity by Science targets both sides of the equation — delivering stable hormonal balance, not rollercoasters.
Steady daytime energy
PROBLEM
As men age, testosterone gradually declines while cortisol often rises — leading to energy crashes, sluggish mornings, and that classic mid-afternoon dip. Most boosters give a short-term spike that fades fast.
Solution
Longevity by Science supports healthy T levels and reduces cortisol through adaptogens like KSM-66® Ashwagandha and LJ100® Tongkat Ali, helping your body maintain a more stable hormonal environment. The result is consistent energy throughout the day, not jittery bursts. Within weeks, many notice they no longer rely on caffeine to stay sharp.
Leaner, “tighter” look
PROBLEM
Increased aromatase activity in fat tissue converts testosterone to estrogen, making it harder to lose belly fat and keep a lean physique. This hormonal drift explains why many men hit a plateau despite training and clean eating.
Solution
Longevity by Science tackles this at the root — supporting testosterone production while optimizing estrogen metabolism with DIM and Boron. This dual action helps reduce water retention, supports better nutrient partitioning, and makes it easier to achieve a firmer, leaner body over time.
Revived Libido & Drive
PROBLEM
Lower free testosterone and rising estrogen can blunt sexual desire, reduce morning erections, and lower confidence. Many men report “normal” T on paper but still experience low libido due to hormonal imbalance at the tissue level.
Solution
Clinically dosed Tongkat Ali (LJ100®) and Shilajit (PrimaVie®) support free testosterone, while DIM and Boron help maintain a healthier T:E ratio — the hormonal foundation of male sexual vitality. With consistent use, men notice renewed libido, stronger drive, and improved sexual confidence.
Deeper sleep, better recovery
PROBLEM
Hormonal imbalance and stress dysregulation can disrupt sleep architecture, leading to shallow sleep and poor recovery. Low testosterone is associated with reduced slow-wave sleep, while high evening cortisol blunts melatonin production.
Solution
By supporting hormonal balance and lowering stress response, adaptogens like KSM-66® Ashwagandha promote deeper, more restorative sleep. Over time, better sleep feeds back into higher testosterone production, improved recovery, and a stronger circadian rhythm — creating a virtuous cycle.
Sharper focus & mood
PROBLEM
Fluctuating hormones can lead to brain fog, irritability, and loss of motivation. Testosterone plays a role in neurotransmitter regulation (especially dopamine), while high estrogen or cortisol blunt cognitive sharpness and resilience.
Solution
Longevity by Science restores hormonal balance, which in turn supports dopamine and serotonin activity, stabilizes energy, and improves stress resilience. Many men describe it as “a fog lifting” — clearer thinking, steadier mood, and stronger mental drive throughout the day.
Don’t take our word for it.
Real stories from men who stopped guessing — and started feeling like themselves again.
⭐️ 4.8/5 average rating from over 1,000 verified customers. Backed by real-world results and clinical precision.
*Behind every transformation is a formula built on real clinical data — not marketing claims.
The Only Dual-Action Formula Clinically Crafted for Men Over 40
You’ve probably seen dozens of ‘T boosters’ online — but here’s the truth: most ignore the other side of the equation.
Longevity by Science was built differently — using clinically studied nutrients that support both testosterone production and estrogen metabolism for balanced, lasting results.
Balances Testosterone and Estrogen
Clinically Studied Extracts
Adaptogens + micronutrients
Scientifically Proven Dosing
HSA/FSA Eligible
Safe, Non-Hormonal (No TRT)
Third‑party tested
Bonuses (guides, tools)
Money‑back guarantee
90 Days
Others
Some
Some
30 Days
When you combine clinically dosed adaptogens with expert-guided support, results stop being random — and start being predictable.
Backed by Science, Formulated with Precision
Longevity by Science is focused on clinically-studied ingredients, with proven track records.
Most importantly, each ingredient is in a quantity that makes sense.
We acknowledge the need of products, that use scientifically proven ingredients in the right amounts for every person's body.
95%
say they feel stronger drive and motivation in both work and training.
92%
of customers report steadier daily energy and reduced fatigue within the first 3 weeks
97%
notice improved mood, focus, and sleep quality within the first month.
KSM‑66® Ashwagandha
Studied for stress resilience, sleep, and performance support.
LJ100® Tongkat Ali
LJ100®
Tongkat Ali
Supports healthy free testosterone and mood.
PrimaVie® Shilajit
PrimaVie®
Shilajit
Supports energy production and workout capacity.
The science
Fenugreek Seed Extract
Supports healthy free testosterone and mood.
The science
Fenugreek is one of the few botanicals consistently shown to increase testosterone in human trials. It works by supporting free T levels, aromatase inhibition, and improving insulin sensitivity.
Multiple randomized controlled trials report 5–15% increases in testosterone and improvements in libido and strength over 8–12 weeks of use 8.
Key Studies:
8. Rao et al., Phytother Res. 2016; reviewed in Sci Direct (link)
Boron
Shown to increase free testosterone and influence estrogen
The science
Boron is a trace mineral shown to lower SHBG, increase free testosterone, and modulate estradiol levels.
Short-term supplementation (6–10 mg/day) has demonstrated increases in free testosterone and reductions in inflammation markers 9.
Key Studies:
9. Naghii et al., J Trace Elem Med Biol. 2011 (link)
DIM (Diindolylmethane)
Supports healthy estrogen metabolism.
The science
Derived from cruciferous vegetables, DIM helps the body metabolize estrogen more efficiently, shifting it toward “cleaner” 2-hydroxy pathways.
This supports a healthier T:E ratio, which is crucial for midlife male hormone balance. While most studies focus on estrogen metabolism, its inclusion is mechanistically sound for men focused on hormonal optimization 10.
Key Studies:
10. Thomson et al., Nutr Cancer. 2017 (link)
Vitamin Complex
Vitamin D3, Vitamin K2, Zinc and Magnesium.
The science
These nutrients act as critical hormonal cofactors:
K2 (MK-7): Supports calcium regulation and works synergistically with D3.
Zinc: Essential for androgen synthesis; deficiencies directly reduce testosterone.
Magnesium: Supports free T levels, improves sleep, and aids recovery.
11. Wehr et al., Horm Metab Res. 2010 (link)
BioPerine®
Antioxidant support and absorption synergy.
The science
Piperine doesn’t directly affect hormones — but it’s a bioavailability enhancer, increasing the absorption of nutrients and botanicals.
By inhibiting key metabolizing enzymes, BioPerine ensures your body gets more out of every dose 14.
Key Studies:
14 Shoba et al., Planta Med. 1998 (link)
No guesswork. No hidden blends. Just science you can trust.
Longevity by Science isn’t built on trends — it’s built on clinical research, precise formulation, and a deep understanding of what happens to male hormones as we age.
Each ingredient has a clear role: boosting testosterone production, supporting estrogen balance, enhancing absorption, or strengthening the body’s hormonal foundation.
This isn’t about chasing short-term spikes — it’s about restoring balance, energy, and vitality in a way that’s natural, intelligent, and sustainable.
When taken consistently, this formula works with your body — not against it — to help you feel sharper, leaner, and more alive.
4.8/5 from over 1,000 verified reviews
Backed by clinical research. Chosen by men who wanted real change.
Start your 90-day transformation — and save up to 52% when you commit to your results.
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✔️ Personalized Workout & Nutrition Plan (built around your goals)
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✔️ Hormone Testing Guidance (know exactly what to test & when)
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Pay with HSA/FSA
Ships within 24 hours. Try it for 90 days.
*Consistency matters: most men report visible change after 4–6 weeks.
It’s Not a Quick Fix — It’s a Proven System to Feel Like Yourself Again.
Longevity by Science was never meant to be a “take one capsule and hope for the best” gimmick.
Hormone health isn’t just about a supplement — it’s about supporting your body with the right lifestyle, nutrition, and tracking.
That’s why when you subscribe, you don’t just get a bottle every month. You get an entire system designed to keep you consistent and accountable:
1.
Personalized Workout & Nutrition Plan
Designed around your hormone profile and real-life schedule — not a generic template. You’ll know exactly what to eat and how to train to support energy, drive, and body composition.
2.
Personalized Hormone Testing Guidance
Know your numbers. We show you what to test, when, and how to interpret results — so you can track real progress, not just “feel” it.We prepare personalized for you testing panels and guidance.
3.
Private Support Community
Connect with other men on the same journey — sharing wins, motivation, and accountability.
You’re not doing this alone anymore — and that’s what makes results stick.
HSA/FSA Payments With Flex
Use your Health Savings Account (HSA) or Flexible Spending Account (FSA) to purchase THRIVE using pre-tax dollars.
90 DAY
RISK FREE
TRIAL
Our 90-Day Results Guarantee — Feel the Shift or It’s Free.
If you don’t notice a difference — more steady energy, clearer focus, better mood, and a natural return of drive — within 90 days, you get every cent back.
No forms. No fine print. Just results, or a refund.
Why we offer it?
Because real change takes time. Hormones respond to consistency — not quick fixes.
We built Longevity by Science for men serious about results — and we’re willing to prove it.
Experts Agree: Balance, Not Just Boosting, Is the Key to Real Results.
To make sure Longevity by Science delivers real, measurable results — not hype — we brought our formula to physicians and hormone specialists who’ve spent decades studying men’s health.
Their verdict? A more complete, evidence-based way to restore energy, focus, and balance — naturally.”
“The issue often isn’t low testosterone — it’s imbalance. Longevity by Science is one of the few formulas addressing both sides using clinically studied ingredients like KSM-66®, LJ100®, DIM, and PrimaVie®. It’s a smart, non-suppressive option for men wanting to restore balance naturally — before considering TRT.”
Dr. Michael Grant, MD
Functional Medicine & Men’s Health
“What sets Longevity by Science apart is its transparency. Every ingredient is standardized, backed by clinical studies, and designed for sustainable results. I recommend this approach for men seeking steady energy, sharper focus, and better body composition — not quick fixes.”
Dr. Elena Vassilev, ND
Integrative Endocrinology Specialist
“Most testosterone boosters only try to raise T — ignoring the hormonal feedback loop entirely. Longevity by Science supports both testosterone and estrogen metabolism, helping men regain energy, focus, and drive without disrupting natural balance. It’s the most complete, evidence-based approach I’ve seen.”
Dr. James Porter, DO
Urology & Men’s Health
Frequently Asked Questions
How is Longevity by Science different from other testosterone boosters?
Most T-boosters focus only on raising testosterone — but that’s just half the story. Longevity by Science targets both testosterone production and estrogen metabolism, restoring the balance that drives real results. Every ingredient is clinically dosed, standardized, and fully disclosed — no proprietary blends, no guesswork.
Can this really make a difference if my testosterone levels are already “normal”?
Yes — because feeling “off” isn’t just about total testosterone. When estrogen metabolites build up, even normal T can become less effective. Our dual-action formula improves how testosterone functions at the cellular level, helping you regain energy, focus, and drive even if your bloodwork looks fine.
Can this help if my testosterone levels are clinically low (hypogonadism)?
If your testosterone is significantly below the normal range, it’s important to first understand why — stress, sleep, excess body fat, nutrient deficiencies, or medical causes can all contribute - which is why we offer the full nutrition, workout and testing to our subscribers.
Longevity by Science is designed to support your body’s natural production through the HPTA axis — using clinically studied adaptogens like KSM-66®, LJ100®, and PrimaVie®.
For men with mild or functional hypogonadism (not caused by testicular damage), this can make a real measurable difference in energy, mood, and free testosterone levels.
However, if your doctor has diagnosed primary hypogonadism (where the testes no longer respond), medical therapy like TRT may be necessary.
Will this shut down my natural testosterone production?
No. Longevity by Science works with your body, not against it. Unlike synthetic hormones or TRT, our ingredients support your natural HPTA axis — helping your body produce and regulate testosterone on its own, safely and sustainably.
When will I start to feel results?
Most users notice subtle improvements in energy, mood, and sleep within 2–3 weeks. Physical changes like body composition, recovery, and libido often become noticeable around 6–8 weeks. For full hormonal optimization, consistent use for 3–6 months delivers the best results.
Is it safe? Are there side effects?
Yes, it's safe — our formula is made from clinically studied, standardized ingredients like KSM-66®, LJ100®, and PrimaVie®. These have been shown in peer-reviewed studies to be safe and well-tolerated. We recommend following the dosage and consulting your doctor if you have a medical condition or are taking medication.
Can I take this while on TRT or other supplements?
If you’re currently on TRT, we recommend discussing it with your healthcare provider. Some users use Longevity by Science alongside TRT to support estrogen metabolism and overall balance — but individual needs vary. If you’re using other supplements, our formula replaces most generic T boosters.
How do I take it?
Take 3 capsules daily, ideally with food and a glass of water. You can take them all at once or split them (morning and early afternoon). Consistency matters more than timing.
Do I need to cycle off?
No cycling is required. Because our ingredients are adaptogenic and non-suppressive, Longevity by Science is designed for continuous daily use. Most users stay on it long-term for sustained benefits.
What happens if I stop taking it?
Your hormones will gradually return to their baseline levels. Unlike TRT, stopping doesn’t cause a crash or dependency, since the formula supports your natural production, not replaces it.
Do I need to change my diet or training?
No — but combining Longevity by Science with balanced nutrition, resistance training, and adequate sleep will accelerate results. Every subscriber receives a personalized workout and nutrition plan built around their lifestyle.
Can I measure progress scientifically?
Absolutely. Subscribers get guidance on hormone testing — including what to test, when to test, and how to interpret results. Many users track improvements in total T, free T, and estrogen metabolites within 8–12 weeks.
Is it vegan, gluten-free, or allergen-free?
Yes — it’s vegan-friendly, non-GMO, and free from gluten, soy, and major allergens.
Do you offer a guarantee?
Yes. Every order comes with a 60-day risk-free guarantee. If you don’t feel a difference, return it — no questions asked.