How ingredients work, what the trials found, how products stack up and what to check before you buy. The Trusted Health Reviews editors write every guide. Some links in them earn us a commission. We only cover products from brands we have affiliate relationships with, so our top picks are the best of the products we cover, not of every product on the market.
Is VigRX Plus legit? We checked Leading Edge Health, the 2012 clinical study, the 67-day refund terms, the BBB record and the counterfeit risk. Here is what turned up.
Side effects of VigRX Plus ingredient by ingredient, what the 2012 trial reported, interactions with blood thinners, nitrates and diabetes drugs, and who should avoid it.
What low testosterone looks like in men, how early-morning blood tests work, which causes are common, and when it makes sense to book a doctor's appointment.
Five testosterone-support supplements for men over 40 ranked, with ingredients, doses, what the research shows, guarantee terms and cautions. Brands listed pay us commissions.
NMN and NR both raise NAD+, so how do they differ? We look at the human evidence, doses studied, US regulatory status and the limits of what either one can do.
VigRX Plus and Testosil serve different goals, male sexual health and testosterone support. We compare the evidence, doses, guarantee terms and how to decide.
Many testosterone supplements list KSM-66 ashwagandha. See how it differs from generic ashwagandha, what trials found, and where the evidence runs out.
Semenax has one small, company-funded, placebo-controlled trial. We cover its design, the semen volume result, what it didn't show and what that means if you're thinking of buying.
HerSolution and Provestra are women's libido supplements from one maker. We compare formulas, evidence, safety cautions and which woman each might suit.
Seven warning signs help separate evidence-backed supplements from marketing-led formulas. Check them before you spend money on any health product.
Almost every supplement brand says it follows cGMP, yet few buyers know what the term covers or what it leaves out. Here is a plain explanation of both.
GenF20 Plus has one published placebo-controlled trial. We explain its results, why the main IGF-1 finding wasn't significant, the ingredients and the guarantee terms.
What the resveratrol research really shows, why absorption is a hurdle, the doses used in human trials, and what to check before you buy trans-resveratrol.
Five male sexual-health supplements compared on ingredients, published trials, guarantee terms and cautions, with our top pick named. Brands pay us commissions.
Five HGH releaser supplements compared on ingredients, doses, the single published product trial and guarantee terms. None contains growth hormone. Brands pay us commissions.
Our 2026 take on VigRX Plus: the single published trial, the formula sold today, guarantee terms and whether it keeps its top pick spot among male sexual-health supplements.
Semenax and Volume Pills are two long-running semen volume supplements. We compare their evidence, ingredients, safety cautions and money-back guarantees.
BrainPill, CortiSync and CalmLean compared on ingredients, doses, product trials and guarantees, and which one is really built for focus and memory. Brands pay us commissions.
Our ProSolution Plus review walks through the 2011 placebo-controlled trial of its herbal formula, what it did and didn't show, key cautions and who it might suit.
Women's libido supplements and topical products for 2026 compared: ingredients, what the evidence shows, guarantee terms and cautions. Every brand listed pays us commissions.
Our Kollagen Intensiv review: what stands behind the SYN-COLL peptide claims, why retinol has the best support, how the guarantee works and who it may suit.
Is GenuinePurity NMN worth it? We cover the 500 mg liposomal formula, the human NMN trial evidence, the 97-day guarantee terms and the auto-renewing $19 offer.
Five testosterone support supplements compared on disclosed doses, human evidence, guarantees and cautions. None has been tested as a finished product. Brands pay us commissions.
Our HyperGH 14x review covers the amino acid tablets and oral spray, doses that fall short of growth hormone research, the Mucuna caution and guarantee terms.
DIM3X reviewed: 200 mg of DIM with AstraGin and BioPerine, what DIM research shows in men, the tamoxifen and SHBG cautions and the 67-day guarantee.
Supplements for men over 50 compared: ingredients, evidence and who they may suit, across memory and focus, testosterone and prostate support, bone health and an andropause formula. Brands pay us commissions.
Our CalmLean review covers the ForsLean forskolin, cayenne and chromium formula, what the small forskolin trials found, the guarantee terms and who it may suit.
Our BrainPill review covers the Synapsa bacopa and Cognizin citicoline formula, the findings of its company-sponsored trial, the 67-day guarantee terms and who it may suit.
Our review of VigRX Nitric Oxide: the L-arginine and L-citrulline blend, why undisclosed doses are a problem, what research exists on these amino acids, and safety cautions.
NMN, NMN-H, trans-resveratrol, spermidine and an HGH releaser compared on formula, human evidence, guarantees and cautions. None is proven to slow aging; all pay us commissions.
Confitrol24 reviewed: the Urox herbal blend, its single company-funded trial, why the hidden dose matters, the 67-day guarantee and who might consider it.
CortiSync reviewed: its Sensoril ashwagandha base, what stress and cortisol trials found, why nothing shows it raises testosterone, and who might consider it.
Our Provacyl review covers its long ingredient list, the 20 mg of DHEA, why we can't check its HGH claim, safety cautions and who should steer clear of it.
Our Fertility Factor 5 review covers its LJ100 Tongkat Ali, selenium, zinc and ginseng formula, the ingredient research, the 67-day guarantee and who it may suit.
Our Testodren review covers its sole ingredient, Furosap fenugreek extract, the one small study behind it, what that study did and didn't show, and who might consider it.
Our GenF20 Muscle review covers what we could and couldn't verify about the formula, why its HGH claims are unproven and the related product we review in its place.
Five skincare products for women compared, from a peptide and retinol face cream to creams for the look of scars and dark spots. Ingredients, evidence, guarantees. Paid commissions apply.
Dermefface FX7 reviewed: what the topical scar cream contains, how thin the evidence for its ingredients is, the guarantee terms and who might consider it.
Our Illuminatural 6i review: the ingredients in this hydroquinone-free brightening cream, what the evidence says, the guarantee terms and single-ingredient rivals.
Our GenuinePurity Spermidine review covers the 8 mg formula, what animal studies and the SmartAge trial show, the 97-day guarantee, and who might consider it.
Six longevity supplements we cover, including NMN, NMN-H, spermidine, quercetin and an all-in-one stack: contents, human evidence and cautions. Brands pay us commissions.
Our Total Curve review covers its pill-plus-gel system, the source of the up to 8.4% Volufiline claim, the herbal cautions and the guarantee terms.
How to pick a health supplement in 2026: grading the clinical evidence, checking doses, manufacturing standards and guarantees, and spotting red flags.
Our ProExtender review covers what traction device studies found, why ProExtender itself hasn't been studied, the time commitment involved and who it might suit.
Published trials of ashwagandha extracts such as KSM-66 and Sensoril looked at stress, cortisol, sleep and testosterone. Here are the results, doses and safety cautions.
Small human trials show NMN reliably lifts blood NAD+, with mixed results on everything else. We cover tested doses, safety gaps and what to realistically expect.
VigRX Plus has a single small placebo-controlled trial from 2012. We cover its results, how the current formula differs, the ingredients, cautions and the guarantee.
GenF20 Plus has a single small product trial on IGF-1. Here is what it showed and didn't, the ingredient doses, the 67-day guarantee terms and who should avoid it.
HerSolution is a herbal libido pill with six ingredients and no published clinical trial. We look at what's in it, the evidence, the 67-day guarantee and who should skip it.
Semenax has one small, company-funded, placebo-controlled trial. We cover its semen volume result, what it didn't show, the ingredient list and safety cautions.
BrainPill lists Synapsa bacopa and Cognizin citicoline at disclosed doses. We go through its single company-sponsored trial, the ingredient evidence and who should skip it.
CortiSync pairs 300 mg of Sensoril ashwagandha with six other ingredients. We review the stress and cortisol evidence, what can't be claimed for testosterone and cautions.
Resveratrol extended life in some animal studies, yet human trials show small, inconsistent effects. We weigh the evidence, the sirtuin and NMN claims, and who should take care.
Spermidine switches on autophagy and lengthens life in animals, but the best human trial found no benefit. We cover the research, the doses and who needs to be careful.
Testosil combines KSM-66 ashwagandha (300 mg per serving), D-aspartic acid, zinc and vitamin D. We look at the research, the doses, safety cautions and guarantee terms.
Kollagen Intensiv is a face cream built on SYN-COLL peptide and retinol, not a pill. Here is what the research says about its ingredients, the guarantee and the risks.
Confitrol24 contains the Urox blend, studied in one published, company-funded 8-week trial. We cover that trial, the undisclosed dose, the guarantee and safety cautions.
CalmLean is a caffeine-free fat burner based on ForsLean forskolin. We look at its ingredients, the small, mixed forskolin trials, the cautions and what to expect.
DIM3X supplies 200 mg of DIM daily. We cover what DIM does to estrogen metabolism, the missing testosterone evidence in men, the tamoxifen interaction and other cautions.
Provestra is a daily herbal and vitamin pill marketed for women's libido. We look at the ingredients, why there's no product trial, safety cautions and the 67-day guarantee.
HyperGH 14x pairs amino acid tablets with an oral spray aimed at lifters. We cover its doses, the missing product trial, Mucuna in the spray and athlete cautions.
TestRX blends D-aspartic acid, fenugreek, zinc, magnesium and vitamins D3 and K2, without ashwagandha. We check the ZMA research, the doses and who it might suit.
Each 2-capsule serving of GenuinePurity NMN gives 500 mg of NMN. Below: the human NMN evidence, the liposomal claim, the 97-day guarantee and the auto-renewing trial offer.
GenuinePurity NMN-H contains reduced NMN (NMNH), a newer NAD+ precursor. We look at the mostly lab and animal evidence, the unverified dose, the guarantee and safety unknowns.
When does ashwagandha start working? Most trials lasted 6 to 12 weeks, and results for stress, sleep and testosterone were reported at 8 to 10 weeks.
When does NMN start to work? Trials of a few weeks to three months saw blood NAD+ rise, yet nothing reliable shows when, or whether, you'll feel any difference.
VigRX Plus has one published trial, and it checked results at 12 weeks. Nobody has reliable data on earlier changes. Here is what that trial found and missed.
How soon does Testosil work? The product itself hasn't been trialed, so timing is unknown. We cover the KSM-66 ashwagandha trials and how the guarantee works.
When does GenF20 Plus start to work? Its single 12-week trial found no significant IGF-1 rise over placebo overall, and nothing is known about earlier effects.
When does HerSolution start to work? No clinical trial has tested it, so no reliable timeline exists. Here is what's known and how the 67-day guarantee works.
When does Semenax start to work? Its one company-funded trial measured semen volume after two months, and nothing reliable covers earlier changes. See what it found.
When does resveratrol start to work? Human trials of weeks to months found small, inconsistent effects, with no reliable timeline and no evidence it slows aging.
When does spermidine start to work? The best human trial lasted 12 months and found no memory benefit. See why no reliable timeline exists and what the evidence says.
When does collagen start to work? We review oral collagen trials and the ingredient studies behind Kollagen Intensiv cream, and explain why no reliable timeline exists.
KSM-66 ashwagandha explained: what its small trials found for stress, sleep, strength and testosterone, the doses used, safety cautions and products with it.
A plain look at NMN as an NAD+ precursor: what small human trials found, the doses used, safety, how it stacks up against NR and NMNH, and what to check on a label.
What trans-resveratrol is, what SIRT1 research does and doesn't show in people, the doses used in human trials and what is known about combining it with NMN.
What NAD+ is, why levels may fall with age, what small human trials of NMN and NR show about raising it, plus safety notes and what remains unproven.
Sirtuins (SIRT1-7) depend on NAD+. Here is what they do and where the evidence stands on resveratrol, NMN and other attempts to switch them on.
DIM (diindolylmethane) changes estrogen metabolism in human studies, mostly in women. Here is how it works, the 100-300 mg doses studied, the male evidence and cautions.
What IGF-1 is, what 'HGH releaser' supplements contain and how strong the evidence is, including the one GenF20 Plus trial and its non-significant main result.
A plain guide to collagen: oral peptides versus topical creams, what the trials found, what SYN-COLL is, and why the proof is thinner than the ads suggest.
Bioavailability is how much of a supplement reaches your blood. Learn which ingredients absorb poorly and what absorption aids such as BioPerine can and can't do for you.
Third-party testing means an outside lab has checked what is in a supplement. Learn why it matters, what a Certificate of Analysis shows and what to look for.
What spermidine does in cells, what lab and human studies found, which foods supply it, the doses tested and what to look at before you buy a supplement.
What nitric oxide does for blood flow, where L-arginine and L-citrulline differ, what the erection studies showed, and the safety points to know before using NO products.
Normal testosterone production needs zinc, and a deficiency can lower it. We cover the research, who tends to run low, sensible doses and the upper limit.
Low vitamin D is common in winter and tied to lower testosterone in observational studies. See what trials found, plus sensible doses and the upper limit.
Does ashwagandha lower cortisol? We review the KSM-66 and Sensoril human trials, the doses used, how long each ran and where the evidence falls short.
Maca is a Peruvian root found in men's and women's libido supplements. See what the small studies suggest, what they leave unanswered and who should take care.
What magnesium does, how much adults need, how the common forms differ, what research says on testosterone and sleep, and the supplement upper limit.
Cognizin is a branded citicoline that has been studied in small randomized trials on attention. See what it is, what those trials found and which doses they used.
Bacopa monnieri has fairly consistent memory research for an herbal nootropic, but effects are modest and slow. See what Synapsa is, studied doses and limits.
A look at what L-carnitine does in the body, how ALCAR, LCLT, PLCAR and GPLC differ, how thin the supporting evidence is, and who might think about taking it.
A plain guide to quercetin: what human trials show, why the senolytic label rests mostly on lab and animal work, typical doses, drug interactions and absorption.
A few small, mostly maker-funded trials point to modest testosterone and libido effects from fenugreek. Here are the findings, the doses used and what popular boosters contain.
What men over 60 ask about, from testosterone support to NMN-H and spermidine: what human studies show and the cautions that count at this age. Brands listed pay us commissions.
A guide for women over 40 to libido, skin, bladder and NAD+ products: the ingredients, what research shows and the cautions to check first. Brands listed pay us commissions.
Skin, bladder, libido and longevity products for women past menopause: what they contain, what the evidence shows and the cautions to check first. Brands listed pay us commissions.
Before you buy NMN, look at the dose, the form, purity testing, label transparency and refund terms, and compare them with what the published trials used.
Before you buy a testosterone supplement, compare doses with the research, look for open labels, watch zinc and vitamin D limits, and know when to see a doctor.
Quality and evidence differ widely among female libido supplements. Here is how to judge the mechanism, ingredients, label quality and the warning signs to skip.
Learn to read a Supplement Facts panel: serving size, per-ingredient doses, proprietary blends, ingredient forms and what a cGMP statement really tells you.
Proprietary blends keep individual ingredient doses hidden. We explain why makers use them, what they can conceal and why Trusted Health Reviews counts them against a product.
Some supplement refund promises are useful and others close to worthless. Learn what to look for, which conditions catch buyers out and what to check first.
Review sites often earn commissions, and that can skew their verdicts. Learn the signs of bias, what an honest review includes and what to check before you trust one.
'Natural' is a marketing word and not a quality standard. Here is what natural and synthetic mean for supplements, when the difference counts and when it doesn't.
Not every study counts equally. See how RCTs, observational studies, animal studies and in vitro research differ, and what each kind of evidence means for a supplement.
Anti-aging supplements for men we cover: testosterone support, resveratrol, an HGH releaser, spermidine and NMN-H, and what human evidence does and doesn't show. Brands pay us commissions.
Anti-aging products for women we cover, from a retinol face cream to resveratrol, spermidine, NMN-H and a herbal blend, and what the evidence shows. Brands pay us commissions.
HGH supplements contain no growth hormone. See what's in them, what the research shows, which checks to run before you buy and the red flags to watch for.
Three GenuinePurity NAD+ products sold in the US, side by side: standard NMN, NMN-H and the Longevity+ stack. Doses, human evidence, guarantees and cautions. Brands pay us commissions.
BrainPill and CortiSync compared head to head: ingredients, evidence, guarantee terms and how to choose between a focus and memory formula and a stress supplement in 2026.
CalmLean and CortiSync compared side by side: ingredients, evidence, guarantee terms and which of the two we'd choose in 2026, depending on your goal.
Confitrol24 and VigRX Incontinix compared head to head: formulas, evidence, guarantee terms and which one we'd point different readers toward in 2026.
CortiSync and DIM3X compared head to head: ingredients, evidence, guarantee terms and which one suits which man, with our 2026 verdict.
CortiSync and Testosil compared head to head: ingredients, evidence, guarantee terms and which approach fits which reader, with our 2026 verdict.
Dermefface FX7 and Skinception compared head to head: ingredients, evidence, guarantee terms and which cream suits which concern, with our 2026 verdict.
DIM3X and Testosil compared head to head: ingredients, evidence, guarantee terms and which one fits which goal, with our 2026 verdict.
Erectin Gummies and Erectin Capsules compared: what's in each, the evidence, the guarantees and which one we'd pick in 2026.
Erectin and ProSolution Pills compared on ingredients, evidence and guarantees, with the one we'd choose in 2026.
Fertility Factor 5 and Semenax compared on ingredients, evidence and guarantees, with our 2026 verdict on which suits which goal.
GenF20 Calcium and GenF20 Plus compared on ingredients, evidence and guarantees, with our 2026 verdict on how the two differ.
GenF20 Muscle and HyperGH 14x compared on ingredients, evidence and guarantees, with our 2026 verdict on which one we can point you to.
GenF20 Plus and GenFX compared on ingredients, evidence and guarantees, with our 2026 verdict on which HGH releaser has the stronger case.
We put GenF20 Plus and HyperGH 14x head to head on ingredients, trial evidence, money-back terms and fit, then give our 2026 verdict on which to pick.
GenuinePurity Longevity Plus and GenF20 Plus compared on ingredients, evidence, money-back terms and who each suits, plus our 2026 verdict on the pair.
What US buyers should know about GenuinePurity NMN, NMN-H and Longevity Plus: doses, human NMN evidence, lab certificates, the 97-day guarantee and the auto-renewing trial.
GenuinePurity NMN and NMN-H compared on dose, human evidence, guarantee terms and who each form suits, with our 2026 verdict on which to choose.
GenuinePurity NMN-H and GenF20 Plus compared on ingredients, evidence, money-back terms and who each suits, followed by our 2026 verdict on the pair.
HerSolution and Total Curve compared on ingredients, evidence, money-back terms and who each product suits, with our 2026 verdict on the two.
HerSolution and Vigorelle compared on ingredients, evidence, money-back terms and who each product suits, with our 2026 verdict on pill versus cream.
Illuminatural 6i or Skinception? We compare ingredients, evidence, guarantees and who each suits, then give our 2026 verdict on the dark-spot cream.
Kollagen Intensiv or Skinception? We compare ingredients, evidence, guarantees and who each one suits, and give our 2026 verdict after weighing both.
Nexus Pheromones or VigRX Plus? We compare what each one is, the evidence behind it, the guarantees and who each suits, and give our 2026 verdict.
Comparing GenuinePurity NMN with GenuinePurity Trans-Resveratrol: doses, the human evidence behind each, guarantee terms, and which kind of buyer each one fits.
PrimeGENIX and Testosil compared: how the formulas differ, what the evidence says, guarantee terms, who each one fits, and which one we pick for 2026.
We set PrimeGENIX against TestRX: formulas, the evidence, guarantee terms, who each one is for, and which we'd pick of the two in 2026.
ProExtender or VigRX Plus: we compare what each product is, the research behind it, guarantee terms and the kind of man each suits, ending with our 2026 pick.
ProSolution Plus compared with Prosolution Pills: how the formulas differ, what the evidence shows, guarantee terms, who each suits and our 2026 choice.
Provacyl and GenF20 Plus go head to head: ingredients, the evidence behind each, safety cautions and who each suits, followed by our 2026 verdict.
Provestra and Vigorelle compared: what's in each, the evidence, the money-back terms and the kind of woman each fits, with our 2026 pick between the two.
GenuinePurity Quercetin set beside GenuinePurity Trans-Resveratrol: doses, human evidence, cautions and which kind of buyer each one fits, with no overall winner.
GenuinePurity Trans-Resveratrol against GenuinePurity Spermidine: doses, what human trials found, safety cautions and who each fits, with the one we pick.
Semenax vs SemEnhance compared on ingredients, evidence, guarantees and who each product suits. See which one we pick for 2026 and why.
Testodren and TestRX compared on formula, evidence, guarantees and who each suits. We give our verdict for 2026 and explain how we got there.
Testosil for US shoppers: its 300 mg KSM-66 per serving, what the research says, how the lifetime guarantee works and what safety points to know first.
Testosil and Testodren compared on formula, evidence, guarantees and who each suits. Read our 2026 verdict and the reasoning behind it.
Testosil versus TestRX, compared on formula, evidence, guarantees and the kind of buyer each fits. Our 2026 verdict and how we reached it.
Total Curve and Kollagen Intensiv compared: what each product is, its ingredients, the evidence, guarantee terms, cautions and who each may suit.
Vigorelle versus HerSolution Gel: ingredients, cream or water-based gel, evidence, condom compatibility, guarantee terms and which one might suit you.
VigRX Delay Spray and Delay Wipes compared: active ingredients, evidence for topical desensitizers, how each is used, cautions and which might suit you.
We compare VigRX Max Volume and Semenax on ingredients, the single published Semenax trial, gaps in the evidence, refund terms, safety cautions and who each suits.
Comparing VigRX Nitric Oxide and VigRX Plus: ingredients, the lone VigRX Plus trial, what research says on L-arginine and L-citrulline, cautions and who each may fit.
VigRX Oil and Erectin Gel side by side: what's in each, the evidence, how they feel on the skin, safety cautions, guarantee terms and which topical may suit you.
VigRX Plus for US shoppers: the single published trial, the current formula, where to buy, how the 67-day guarantee works and who should talk to a doctor before trying it.
VigRX Plus and Erectin compared: ingredients, the lone published VigRX Plus trial, the doses Erectin discloses, guarantee terms, cautions and who each may suit.
VigRX Plus compared with Extenze: what each contains, published evidence, undisclosed doses, hormones and stimulants, an FDA warning and which one may suit you.
VigRX Plus against MagnaRX+: ingredients, published evidence, undisclosed doses, guarantee terms and safety cautions, plus who each product may suit.
VigRX Plus next to ProSolution Pills: ingredients, published evidence, undisclosed doses, guarantee terms, safety cautions and which product may suit you.
VigRX Plus versus Semenax: two different goals (erections and semen volume), what each product's trial found, ingredients, guarantee terms and safety cautions.
Each product gets its own full review covering the label, the research, how to take it and our verdict.
See every review