Side-by-side · Research reference

SemaxvsTestagen

Side-by-side comparison across mechanism, dosage, evidence, side effects, administration, and stack synergies. Citations on every claim where available.

AHuman-MechanisticAUTO-DRAFTED12/39 cited

BAnimal-MechanisticHUMAN-REVIEWED11/41 cited

Semax

Cognitive enhancer · Russian Pharma

200–600 mcg/doseIntranasalKaplan 2017

HumanMechanisticKaplan 2017

~30 minOnset

Intranasal · 2–3×/day during cognitive demand

Testagen

Bioregulator Peptide · Khavinson School

Lys-Glu-Asp-GlySequenceFedoreyeva 2011

NuclearLocalizationFedoreyeva 2011

TesticularTissue target

SQ · Abdomen · Cyclical

01Mechanism of Action

Parameter

Semax

Testagen

Primary target

BDNF / NGF expression + monoamine modulationKaplan 2017

Testicular tissue; proposed nuclear DNA interaction

Pathway

↑ BDNF + NGF synthesis + 5-HT modulation → neuroplasticity + anxiolysis + cognitive enhancementKaplan 2017

Nuclear penetration → DNA/oligonucleotide binding → gene expression modulation (bioregulator hypothesis)Fedoreyeva 2011

Downstream effect

Improved memory + attention; reduced anxiety; neuroprotection in ischemiaKaplan 2017

Proposed support for spermatogenesis and testicular function; mechanistic data limited to nuclear localization and DNA interactionFedoreyeva 2011

Feedback intact?

—

Unknown — no HPG axis data

Origin

Synthetic 7-AA peptide derived from ACTH(4-7) with C-terminal Pro-Gly-Pro stabilising tailKaplan 2017

Khavinson bioregulator school — isolated from testicular tissue peptide fractions

Antibody development

—

02Dosage Protocols

Parameter

Semax

Testagen

Standard dose

200–600 mcg / dose intranasalKaplan 2017

—

Frequency

2–3× per day during cognitive demand

Once daily or alternate days

Lower / starter dose

100 mcg / dose

—

Evidence basis

Human-mechanistic + Russian clinicalKaplan 2017

Animal mechanistic / in vitro onlyFedoreyeva 2011

Duration

10–14 day cycles, repeated PRN

—

Reconstitution

Pre-formulated nasal spray (commercial); research vial: bacteriostatic water

Sterile water or bacteriostatic saline

Timing

Morning + early afternoon

—

Half-life

Short plasma; CNS effect lasts ~3–6 hr

Unknown — likely minutes (short peptide)

Typical protocol (anecdotal)

—

100–200 mcg / day

No published human dosing studies; derived from Russian bioregulator practice.

Cycle length

—

10–20 days on, 10–14 days off

Bioregulator tradition uses pulsed cycles; no controlled data.

Route

—

Subcutaneous

04Side Effects & Safety

Parameter

Semax

Testagen

Nasal irritation

Mild burning or congestion (transient)

—

Sleep disruption

Late-day dosing may interfere with sleep

—

Headache

Uncommon, transient

—

Long-term safety

Limited Western RCT data

Unknown — no long-term studies

Pregnancy / OB

Avoid

—

Injection site reactions

—

Erythema, mild irritation (potential)

Systemic effects

—

Unknown — no human safety data

Hormonal impact

—

No published data on testosterone, LH, FSH effects

Absolute Contraindications

Semax

·Pregnancy / breastfeeding

Testagen

·Active testicular malignancy

Relative Contraindications

Semax

·Active psychiatric instability
·Concurrent strong stimulants

Testagen

·Hormone-sensitive cancers (no data; theoretical caution)
·Pregnant or breastfeeding (no data)

05Administration Protocol

Parameter

Semax

Testagen

1. Form

Pre-formulated nasal spray (commercial) or research vial reconstituted with bacteriostatic water.

Add 1–2 mL sterile or bacteriostatic water to lyophilised vial. Swirl gently; do not shake. Solution should be clear.

2. Administration

Intranasal — 2–3 sprays per nostril per dose. Tilt head slightly back.

Subcutaneous — abdomen or thigh. Rotate sites daily. Use standard insulin syringe (27–31G).

3. Timing

Morning + early afternoon. Avoid evening (sleep disruption).

Morning or evening; no established optimal timing. Anecdotal preference: evening to align with circadian testosterone patterns.

4. Storage

Refrigerate after reconstitution; light-protected.

Lyophilised: room temp, dark. Reconstituted: refrigerate 2–8 °C, use within 14–21 days if bacteriostatic water used.

5. Caveat

Cycle on/off to avoid neurochemical adaptation.

10–20 days on, 10–14 days off. Bioregulator tradition uses pulsed exposure; rationale: prevent receptor/pathway desensitisation.

06Stack Synergy

Semax

+ Selank

Moderate

View Selank →

Semax (cognitive enhancer, BDNF/NGF) and Selank (anxiolytic + immune) form the canonical Russian "neuro stack" — both intranasal peptide bioregulators with complementary axes. Semax for cognitive demand; Selank for stress mitigation.

Semax: 200–600 mcg intranasal · morning + afternoon
Selank: 150–300 mcg intranasal · midday + early evening
Primary benefit: Cognitive enhancement + stress mitigation

Kaplan 2017 Zaderej 2014

Testagen

— no documented stacks