RAD-140 and Testosterone Interaction

Monitor
Researched 90% confidence

RAD-140 and Testosterone have an interaction requiring monitoring for interaction with 90% confidence. RAD-140 suppresses endogenous testosterone production through HPG axis negative feedback. Some users run a low-dose testosterone base (e.g., 100-150 mg/week TRT) alongside RAD-140 to mitigate suppression-related side effects such as low libido, lethargy, and mood disturbance. If combining, monitor total testosterone, free testosterone, and estradiol levels closely. Both compounds affect the gonads and heart and liver, so monitoring these systems is recommended.

Compound Profiles

RAD-140

Selective Androgen Receptor Modulator | Investigational SARM

RAD-140 binds to the androgen receptor (AR) with high affinity and selectivity, functioning as a full agonist in muscle and bone tissue while exhibiting minimal agonist activity in the prostate and other androgen-sensitive tissues. This tissue selectivity is achieved through differential cofactor recruitment: upon binding to the AR, RAD-140 induces a conformational change that favors interaction with coactivators predominantly expressed in skeletal muscle and bone, rather than those prevalent in prostate or sebaceous glands.

Half-life: ~60 hours Typical dose: 10-20 mg/day sarm, anabolic
androgen receptorepo receptor androgenicblood pressure raisingcarcinogenic riskcrosses bbb
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Testosterone

Anabolic-Androgenic Steroid | Primary Male Sex Hormone

Testosterone exerts its effects primarily through binding to the intracellular androgen receptor (AR), forming a hormone-receptor complex that translocates to the nucleus and modulates gene transcription. This drives protein synthesis in skeletal muscle (anabolic effect), stimulates erythropoietin production in the kidneys to increase red blood cell mass, promotes osteoblast activity and bone mineral density, and regulates libido and cognitive function.

Half-life: ~8 days (cypionate) Typical dose: 100-200 mg/week (TRT) anabolic, sexual health, metabolic
5 alpha reductaseandrogen receptoraromataseepo receptor androgeniccarcinogenic riskestrogenichematocrit raising
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Combined Organ Load

Gonads
elevated
Heart
moderate
Liver
moderate
Pancreas
low

Shared Safety Flags

2x 2 androgenic compounds (RAD-140, Testosterone). Additive androgenic load — increased risk of hair loss, acne, prostate effects.
2x 2 compounds share the carcinogenic-risk safety flag (RAD-140, Testosterone). Monitor accordingly.
2x 2 hepatotoxic compounds (RAD-140, Testosterone). Liver damage risk significantly increased. Include liver support (TUDCA/NAC) and monitor ALT/AST.
2x 2 HPTA-suppressive compounds (RAD-140, Testosterone). Deep hormonal shutdown expected — plan extended PCT.
2x 2 compounds disrupt lipids (RAD-140, Testosterone). Get lipid panel mid-cycle — consider adding lipid support.

Frequently Asked Questions

Can I take RAD-140 with Testosterone?

Yes, but with caution. RAD-140 suppresses endogenous testosterone production through HPG axis negative feedback. Some users run a low-dose testosterone base (e.g., 100-150 mg/week TRT) alongside RAD-140 to mitigate suppression-related side effects such as low libido, lethargy, and mood disturbance. If combining, monitor total testosterone, free testosterone, and estradiol levels closely. Regular monitoring is advised.

Is RAD-140 and Testosterone safe together?

Based on documented research, this combination is considered monitor. However, shared safety flags include: androgenic, carcinogenic risk, hepatotoxic, hpta suppressive, lipid disrupting. Monitor accordingly.

What are the interactions between RAD-140 and Testosterone?

RAD-140 suppresses endogenous testosterone production through HPG axis negative feedback. Some users run a low-dose testosterone base (e.g., 100-150 mg/week TRT) alongside RAD-140 to mitigate suppression-related side effects such as low libido, lethargy, and mood disturbance. If combining, monitor total testosterone, free testosterone, and estradiol levels closely. This assessment has 90% confidence and is based on documented research data.

How should I time RAD-140 and Testosterone?

RAD-140 has a half-life of ~60 hours and Testosterone has a half-life of ~8 days (cypionate). No specific timing requirements identified for this combination, but separating administration can help monitor individual effects.

Check this pair in the full Interaction Checker Full comparison: RAD-140 vs Testosterone

This interaction analysis is compiled from research literature and pharmacological mechanism data. Always consult a healthcare professional before combining compounds.