HormonalHormone

TRT

Testosterone replacement therapy

Studied forDiagnosed testosterone deficiency4

FDA-approved products treat specified forms of male hypogonadism. The April 2026 announcement invited applications for a possible new indication; it did not approve it.

What does it do?

Testosterone replacement treats diagnosed hypogonadism; it is hormone therapy, not a peptide or a generic wellness intervention.

Approved & studied uses

Specified male hypogonadism

Approved indication4

Current approvals concern specific structural or genetic causes, with product-specific labeling.

Community uses Reported, unvalidated

Restoration

16

Testosterone normalization, sexual symptoms, mood and energy; fertility may be suppressed.

Composition / bone

16

Lean mass, strength, fat and bone density.

Metabolic

16

Insulin-sensitivity and cardiovascular research; benefit is not universal.

Reasons people report using it; these do not establish benefit.16

Evidence limits

View research →

Trial results in selected hypogonadal men do not establish safety of supraphysiologic use or every formulation.3

5 distinct primary sources or abstracts checked. Evidence may concern a parent compound, individual blend ingredient, animal, or cell model; it does not necessarily establish a benefit for this exact product.

Evidence definitions →

Key safety information

All risks →

Blood pressure

FDA requires warnings about increased blood pressure.3

FDA-approved products treat specified forms of male hypogonadism. The April 2026 announcement invited applications for a possible new indication; it did not approve it.

Molecular information

Amino-acid sequence

Not applicable: this compound is not a single peptide.

Reference identity · not independently confirmed16

LengthSteroid hormone (not a peptide)
Molecular weight · Da288.4 Da
Formula, sequence notation & identity
Molecular formulaC19H28O2616

Unesterified testosterone

TRT includes multiple formulations and esters; this is the parent hormone only.

Pep-Pedia identity details

Steroid hormone (not a peptide) · 412.61 Da (Cypionate) / 400.59 Da (Enanthate)

C27H40O3 (Cypionate) / C26H40O3 (Enanthate)

Reference description; checked chemical identity above takes precedence when available.16

Pharmacokinetics

How long does it stay in the body?

Unverified reference estimateNot independently confirmed
Reference half-life5 days – 8 days15
Route / formulationSource page: Injectable. Exact PK route not verified.

This value is reported by a secondary reference. The stated attribution has not been independently verified as a route- and formulation-matched human PK measurement.

Illustrative half-life model for TRT: Pep-Pedia estimateNormalized terminal-phase decline, not measured blood concentration or effect duration. Five half-lives leaves 3.125%. Both boundaries of the reported range are shown; no average is assumed.0%50%100%08 d16 d24 d32 d40 d
50%–64.8%of reference level

Illustrative scenario using an unverified reference estimate. Shading shows the reported half-life range. No midpoint is assumed.

About 3% remaining after 25 d–40 d

Five half-lives in this estimated model. This is not a prediction of when effects stop.

Evidence and model details

Population: Not established by the reference estimate

Source’s stated attribution: FDA Depo-Testosterone label

Source’s reported peak time: 2 days. This has not been independently confirmed and is not used in the elimination curve.

100 × 2−time / half-life. Time zero is a reference level, not the moment of administration. Absorption, repeated dosing, metabolites and clinical effects are not modeled. Five half-lives leaves 3.125%, not zero. This curve cannot determine a dosing interval.

What to expect

Study outcomes

Safety finding has boundaries

Noninferiority for the primary cardiovascular endpoint is not proof of risk-free treatment.5

Reported timelines

Reference & community

Source expectations

Symptoms 3–6 weeks; recovery 2–3 months; composition 3–6; bone 6–12. Route and diagnosis matter.16

These are reported timelines, not a prediction of your response.

Community poll 10 topics · Pep-Pedia snapshot

Voluntary, unverified reports. These percentages do not measure effectiveness or safety.

Primary goal

General wellness52%
Muscle growth32%
Fat loss4%
Cognitive enhancement4%
Other: condition 1%

The source hides 4 additional categories. Their labels and percentages are unavailable.

Number of responses to this question: not disclosed.

Source & limitations

The source displays “712 responses” for this profile. This is not a confirmed participant count or a denominator for individual questions.

  • Voluntary self-reports from Pep-Pedia visitors; identity, treatment, outcomes and timing are unverified. These data are not efficacy or safety estimates.
  • The source displays a profile-wide response label, not a confirmed unique participant count. It stays unchanged across questions. Question-specific denominators and absolute option counts are not exposed.
  • Only the top five categories are displayed for some questions. Extra categories are retained as an undisplayed-category count; their labels and percentages are unavailable.
  • Displayed percentages are rounded. They may not total 100%, especially where categories are hidden.
  • This is a dated snapshot, not a live survey or current recommendation.
Protocols

Doses & schedules

Compare purpose, amount, route, frequency, and duration.

Source corrections

FDA warning language has changed; blanket route-superiority/fertility claims are unsupported.

16 rows
Route

Scroll to compare all columns →

One row for each documented route and dose or dose range
RouteDoseFrequencyGoal / evidenceDurationReferences
TopicalTransdermal1.62% gel, adjusted to testosterone 350–750 ng/dLDailyCardiovascular safety in hypogonadismHuman studyMean treatment 21.7 months5
SubQSubcutaneous100-200 mgWeekly or split 2x/weekStandard TRTReference reportOngoing lifetime therapy for diagnosed hypogonadism16
IMIntramuscular100-200 mgWeekly or split 2x/weekStandard TRTReference reportOngoing lifetime therapy for diagnosed hypogonadism16
SubQSubcutaneous75-100 mgStarting doseWeeklyConservative StartReference reportOngoing lifetime therapy for diagnosed hypogonadism16
IMIntramuscular75-100 mgStarting doseWeeklyConservative StartReference reportOngoing lifetime therapy for diagnosed hypogonadism16
SubQSubQ preferred50-100 mgEvery 3.5 daysStable Levels (Split)Reference reportOngoing lifetime therapy for diagnosed hypogonadism16
SubQSubcutaneous100-150 mg + 250-500 IU hCGT weekly, hCG 2-3x/weekWith hCG (Fertility)Reference reportOngoing lifetime therapy for diagnosed hypogonadism16
IMIntramuscular100-150 mg + 250-500 IU hCGT weekly, hCG 2-3x/weekWith hCG (Fertility)Reference reportOngoing lifetime therapy for diagnosed hypogonadism16
OralOral (with fat-containing meal)237 mgTwice daily with foodJatenzo StandardReference reportOngoing therapy16
OralOral (titrate based on levels)158-396 mgTwice dailyJatenzo Dose RangeReference reportOngoing therapy16
Oral225 mgTwice daily with foodTLANDOReference reportOngoing therapy16
OtherShoulders, upper arms50-100 mgOnce dailyAndroGel 1%Reference reportOngoing therapy16
OtherShoulders, upper arms40.5-81 mgOnce dailyAndroGel 1.62%Reference reportOngoing therapy16
OtherShoulders, upper arms50-100 mgOnce dailyTestim 1%Reference reportOngoing therapy16
OtherScrotum or shoulders100-200 mgOnce or twice dailyCompounded CreamReference reportOngoing therapy16
IntranasalNasal11 mg per nostril3x daily (every 6-8 hours)Standard NatestoReference reportOngoing therapy16

Study and label doses retain their study context. Reference reports are unvalidated practices, not personal treatment instructions. Ranges remain ranges; escalation stages are labeled.

Cycles & timing

Reference reports16

Reported use periods and breaks. These do not establish a safe cycle or prove that breaks prevent tolerance.

Injectable

Use period
Ongoing lifetime therapy for diagnosed hypogonadism
Break
Not applicable - continuous therapy (stopping causes symptoms to return)
Reported timing

Consistent day(s) weekly; morning injection mimics natural rhythm

Oral

Use period
Ongoing therapy
Break
Not applicable
Reported timing

With breakfast and dinner

Topical

Use period
Ongoing therapy
Break
Not applicable
Reported timing

Morning after showering, allow to dry completely

Nasal

Use period
Ongoing therapy
Break
Not applicable
Reported timing

Morning, afternoon, evening - spaced ~6 hours apart

Side effects & safety

Blood pressure

FDA requires warnings about increased blood pressure.

3

Other adverse outcomes

TRAVERSE observed more atrial fibrillation, kidney injury and pulmonary embolism.

5

Population limitation

These findings do not validate unmonitored or supraphysiologic use.

5

Additional reported cautions

Reference reports16

Monitoring

BP, hematocrit and clinically appropriate prostate/hormone assessment; infertility, edema, acne/hair and sleep-apnea concerns.

Route risks

Skin transfer to contacts; flammable gels; nasal injury; oral absorption/product instructions differ.

Urgent

VTE symptoms, dyspnea/edema, major mood/BP changes, high hematocrit, severe local reactions or household virilization.

Not a complete safety screen. Discuss health decisions with a qualified clinician.

Combinations & interactions

7 entries

Check cautions and reported pairings. A compatibility claim does not establish that a combination is safe.

Insulin

Caution reported

Glucose effects.16

Reference report · Pep-Pedia label: Monitor Combination

Anticoagulants

Caution reported

Anticoagulant response may change.16

Reference report · Evidence context: Monitor combination

hCG

Unverified pairing

Fertility strategy needs specialist care.16

Reference report · Pep-Pedia label: Synergistic

Anastrozole

Unverified pairing

Not routinely required.16

Reference report · Evidence context: Supportive

GH peptides

Unverified pairing

Unproven body-composition stack.16

Reference report · Evidence context: Synergistic

Clomiphene

Unverified pairing

Not interchangeable treatment.16

Reference report · Evidence context: Alternative

Other medicines

Not established

A class-level profile cannot replace the interaction section for the prescribed product.3

Research context

Reconstitution

Formulation specific

Approved products include gels and prepared injections. A generic peptide reconstitution recipe does not apply.3

Reference preparation details

Reported handling information, not a validated formulation or instruction to prepare an injectable product.

Injectable

The source discusses finished testosterone products; preparation depends on the exact presentation.

Form
Source describes a prepared product
Reported parameters
Injectable oil, oral products and topical products are not interchangeable.

The site repeats oil-injection instructions across route tabs, including nasal. That repetition does not define route-specific handling.

Oral

The source discusses finished testosterone products; preparation depends on the exact presentation.

Form
Source describes a prepared product
Reported parameters
Injectable oil, oral products and topical products are not interchangeable.

The site repeats oil-injection instructions across route tabs, including nasal. That repetition does not define route-specific handling.

Topical

The source discusses finished testosterone products; preparation depends on the exact presentation.

Form
Source describes a prepared product
Reported parameters
Injectable oil, oral products and topical products are not interchangeable.

The site repeats oil-injection instructions across route tabs, including nasal. That repetition does not define route-specific handling.

Nasal

The source discusses finished testosterone products; preparation depends on the exact presentation.

Form
Source describes a prepared product
Reported parameters
Injectable oil, oral products and topical products are not interchangeable.

The site repeats oil-injection instructions across route tabs, including nasal. That repetition does not define route-specific handling.

16
Appearance & documentation

Appearance and a purity certificate cannot establish sterility, identity, or suitability for injection.

Reported appearancePharmaceutical Grade ProductReported appearanceClear Oil SolutionReported appearanceProper Storage VerificationReported variationCompounded TestosteroneReported concernUnderground Lab (UGL) ProductsReported concernCrystallized or Cloudy Solution
16

Available forms

No verified packaging examples included.

Packaging examples, not a market survey. Approved and research products are not interchangeable.

Storage after mixing

Reconstituted research vials

No applicable mixing data

The available sources describe prepared products or do not establish a reconstitution method.16

Full storage notes from Pep-Pedia16
Injectable

Room temperature 20-25°C (68-77°F). Do not refrigerate or freeze.

Oral

Room temperature

Topical

Room temperature, away from heat and flame (flammable alcohol content)

Nasal

Room temperature, upright position

Storage depends on the formulation, diluent, container, and handling. Follow the specific product label or pharmacist’s instructions.

Research findings

Human trials

Source context

FDA warning language has changed; blanket route-superiority/fertility claims are unsupported.

Compound identity & other names

TRT is testosterone replacement therapy, not a peptide. Evidence, absorption, adverse effects and preparation depend on the prescribed formulation and the reason for treatment.

FDA-approved products treat specified forms of male hypogonadism. The April 2026 announcement invited applications for a possible new indication; it did not approve it.

How it may work

Androgen-receptor signaling; injection esters, oral undecanoate, skin and nasal products have different exposure profiles.16

Safety labeling changed in 2025

FDA removed cardiovascular-outcome boxed-warning language after reviewing TRAVERSE, while requiring warnings that testosterone products can increase blood pressure.

3

2026 announcement is not a new approval

FDA encouraged applications for low libido with idiopathic hypogonadism; substantial evidence is still required before approval.

4

TRAVERSE defines a specific population

Major cardiovascular events occurred in 7.0% versus 7.3% with placebo, meeting noninferiority. Higher rates of atrial fibrillation, acute kidney injury and pulmonary embolism remained relevant.

5

Source checks & newer research

FDA testosterone labeling changes

February 2025: removed boxed-warning language about increased adverse cardiovascular outcomes and required increased-BP warnings. This does not establish risk-free therapy or every route’s equivalence to TRAVERSE gel.

Regulatory update17

FDA current testosterone information

FDA reports June 2026 requested updates removing the age-related-hypogonadism limitation of use and revising prostate/BPH safety language. Indications and contraindications still require the current specific product label.

Regulatory update18
Research areas and evidence gaps

Specified male hypogonadism. Current approvals concern specific structural or genetic causes, with product-specific labeling.4

  • Trial results in selected hypogonadal men do not establish safety of supraphysiologic use or every formulation.
  • A product-specific research-vial quantity was not independently verified in this review.
Community reports Unvalidated

Pep-Pedia discusses diagnosed hypogonadism.7

Editorial summary, not a measured community survey, clinical protocol or recommendation.

Search coverage and review status

Added 2025 labeling changes and the April 2026 indication-development announcement; the latter is not a new approval.

Checked
2026-10-12
Search
testosterone replacement 2025 2026 FDA blood pressure TRAVERSE
Catalog
Pep-Pedia ↗ · 9 listed references retained
  • Targeted search and selected primary-source checks, not an exhaustive systematic review.
  • Preserved bibliography entries marked unreviewed have not had their findings independently verified.

AI-prepared summaries. Independent medical editorial review is pending.

References

Original sources and review status. Open a reference to read its summary.

18 sources

1TRAVERSE Cardiovascular Safety Trial (2023)Trial · 2023 · doi.orgAbstract checked
AI-PREPARED SUMMARY

TRAVERSE found transdermal testosterone noninferior to placebo for major cardiovascular events in selected hypogonadal men with cardiovascular risk. Atrial fibrillation, acute kidney injury and pulmonary embolism occurred more often.

Pep-Pedia bibliography · Checked 2026-10-12

Original source
2Cardiovascular Safety of Testosterone-Replacement TherapyTrial · 2023 · doi.orgAbstract checked
AI-PREPARED SUMMARY

TRAVERSE found transdermal testosterone noninferior to placebo for major cardiovascular events in selected hypogonadal men with cardiovascular risk. Atrial fibrillation, acute kidney injury and pulmonary embolism occurred more often.

Pep-Pedia bibliography · Checked 2026-10-12

Original source
3FDA issues class-wide labeling changes for testosterone productsRegulator · 2025 · fda.govPrimary source checked
AI-PREPARED SUMMARY

FDA removed the cardiovascular-outcome boxed-warning language following TRAVERSE, retained age-related limitations of use, and required blood-pressure warnings.

Safety labeling changed in 2025

FDA removed cardiovascular-outcome boxed-warning language after reviewing TRAVERSE, while requiring warnings that testosterone products can increase blood pressure.

Additional research · Checked 2026-10-12

Original source
4FDA Takes Step Forward on Testosterone Therapy for MenRegulator · 2026 · fda.govPrimary source checked
AI-PREPARED SUMMARY

FDA invited applications for a potential new low-libido indication in idiopathic hypogonadism. The announcement is not an approval of that indication.

2026 announcement is not a new approval

FDA encouraged applications for low libido with idiopathic hypogonadism; substantial evidence is still required before approval.

Additional research · Checked 2026-10-12

Original source
5Cardiovascular Safety of Testosterone-Replacement TherapyTrial · 2023 · doi.orgAbstract checked
AI-PREPARED SUMMARY

TRAVERSE found transdermal testosterone noninferior to placebo for major cardiovascular events in selected hypogonadal men with cardiovascular risk. Atrial fibrillation, acute kidney injury and pulmonary embolism occurred more often.

TRAVERSE defines a specific population

Major cardiovascular events occurred in 7.0% versus 7.3% with placebo, meeting noninferiority. Higher rates of atrial fibrillation, acute kidney injury and pulmonary embolism remained relevant.

Additional research · Checked 2026-10-12

Original source
6PubChem: TestosteroneRegistry · 2026 · pubchem.ncbi.nlm.nih.govPrimary source checked
AI-PREPARED SUMMARY

Chemical identity of unesterified testosterone; injectable esters are different chemical entities.

Additional research · Checked 2026-10-12

Original source
7Pep-Pedia: TRTCommunity · Accessed 2026 · pep-pedia.orgCommunity source checked
AI-PREPARED SUMMARY

Secondary editorial profile and reported practices; not clinical validation.

Original source
8Testosterone Trials - Body Composition (2017)Reference · Accessed 2026 · doi.orgPep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY

Pep-Pedia reports: Older hypogonadal men had improvements in some sexual, mood and physical measures; effects varied by endpoint and trial subgroup.

Reported population / model
788 men ≥65 years

Reported study details
1 year · Multiple endpoints

Reported by Pep-Pedia; the linked publication, design, doses and result have not been independently verified here.

Read the Pep-Pedia report ↗

Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12

Listed study
9Meta-Analysis: Muscular Responses to TRT (2018)Reference · Accessed 2026 · doi.orgPep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY

Pep-Pedia reports: Pooled studies reported greater fat-free-mass and strength changes with intramuscular than transdermal treatment; formulation comparisons may be confounded.

Reported population / model
31 RCTs analyzed

Reported study details
Various formulations · Fat-free mass outcomes

Reported by Pep-Pedia; the linked publication, design, doses and result have not been independently verified here.

Read the Pep-Pedia report ↗

Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12

Listed study
10Long-Term Safety Registry Study (2016)Reference · Accessed 2026 · doi.orgPep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY

Pep-Pedia reports: Registry participants had sustained metabolic/body-composition changes; observational follow-up cannot by itself establish long-term causal safety.

Reported population / model
1,000+ men

Reported study details
Up to 12 years · Real-world outcomes

Reported by Pep-Pedia; the linked publication, design, doses and result have not been independently verified here.

Read the Pep-Pedia report ↗

Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12

Listed study
11Effects of Testosterone Treatment in Older MenReference · Accessed 2026 · doi.orgPep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY

Pep-Pedia reports: Older hypogonadal men had improvements in some sexual, mood and physical measures; effects varied by endpoint and trial subgroup.

Reported population / model
788 men ≥65 years

Reported study details
1 year · Multiple endpoints

Reported by Pep-Pedia; the linked publication, design, doses and result have not been independently verified here.

Read the Pep-Pedia report ↗

Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12

Listed study
12Testosterone supplementation and body composition: meta-analysis of observational studiesReference · Accessed 2026 · doi.orgLinked reference · Not independently reviewed
REFERENCE NOTE

Reference retained from Pep-Pedia’s bibliography; findings and bibliographic accuracy have not been independently verified.

Pep-Pedia bibliography · Checked 2026-10-12

Listed source
13Testosterone Therapy in Men With Hypogonadism: Endocrine Society GuidelineReference · Accessed 2026 · doi.orgLinked reference · Not independently reviewed
REFERENCE NOTE

Reference retained from Pep-Pedia’s bibliography; findings and bibliographic accuracy have not been independently verified.

Pep-Pedia bibliography · Checked 2026-10-12

Listed source
14Evaluation and Management of Testosterone Deficiency: AUA GuidelineReference · Accessed 2026 · doi.orgLinked reference · Not independently reviewed
REFERENCE NOTE

Reference retained from Pep-Pedia’s bibliography; findings and bibliographic accuracy have not been independently verified.

Pep-Pedia bibliography · Checked 2026-10-12

Listed source
15Pep-Pedia: TRT — reported pharmacokineticsReference estimate; not independently verified human PKCommunity · 2026 · pep-pedia.orgCommunity source checked
AI-PREPARED SUMMARY

Lists a half-life of 5 days – 8 days and a peak time of 2 days. Stated attribution: FDA Depo-Testosterone label. This value is reported by a secondary reference. The stated attribution has not been independently verified as a route- and formulation-matched human PK measurement. Five half-lives is not complete clearance, and the source’s “cleared” value is not used as a measured endpoint.

Secondary reference page checked; the underlying quantitative claim is not independently confirmed. · Checked 2026-10-12

Original source
16Pep-Pedia: TRT — route-specific referenceReference page checked; underlying claims require separate verification.Community · Checked 2026 · pep-pedia.orgCommunity source checked
AI-PREPARED SUMMARY

Source page checked across available routes. Protocols, cycles, storage, mechanisms and pairing claims are secondary reports; checking the page does not independently validate those claims. Original concise summaries are used here.

Content coverage audit · Checked 2026-10-12

Original source
17FDA testosterone labeling changesRegulator · 2025 · fda.govPrimary source checked
AI-PREPARED SUMMARY

February 2025: removed boxed-warning language about increased adverse cardiovascular outcomes and required increased-BP warnings. This does not establish risk-free therapy or every route’s equivalence to TRAVERSE gel.

FDA testosterone labeling changes

February 2025: removed boxed-warning language about increased adverse cardiovascular outcomes and required increased-BP warnings. This does not establish risk-free therapy or every route’s equivalence to TRAVERSE gel.

Additional primary-source check · Checked 2026-10-12

Original source
18FDA current testosterone informationRegulator · 2026 · fda.govPrimary source checked
AI-PREPARED SUMMARY

FDA reports June 2026 requested updates removing the age-related-hypogonadism limitation of use and revising prostate/BPH safety language. Indications and contraindications still require the current specific product label.

FDA current testosterone information

FDA reports June 2026 requested updates removing the age-related-hypogonadism limitation of use and revising prostate/BPH safety language. Indications and contraindications still require the current specific product label.

Additional primary-source check · Checked 2026-10-12

Original source
Source details