Testolone RAD-140

RAD-140, aka Testolone, is a potent, non-steroidal SARM, developed by Radius Health. Its name reflects its design goal: to mimic the potent anabolic effects of testosterone while exhibiting strong tissue selectivity. 

RAD-140 binds with very high affinity to androgen receptors in muscle and bone, promoting robust muscle growth and strength gains. It is distinguished by its “dry” and “hardening” effect, producing dense, lean muscle mass with minimal water retention.

RAD-140 Benefits

RAD-140’s high binding affinity translates into a powerful and distinct set of anabolic benefits focused on strength and density.

Significant Increases in Lean, Dense Muscle Mass

RAD-140 is renowned for promoting “dry” gains. It builds hard, dense, and vascular muscle tissue with notably less intracellular water retention compared to bulking compounds like LGD-4033, leading to a more defined physique even during a massing phase.

Dramatic Improvements in Strength and Aggression

One of its most celebrated effects is a rapid and substantial boost in raw strength and training aggression. Users report swift increases in their one-rep maximums and an enhanced ability to push through heavy, intense workouts with greater mental focus and drive.

Enhanced Muscle Hardness, Vascularity, and Definition

The compound promotes a pronounced hardening effect. Muscles appear more striated, full, and vascular, contributing to a lean, powerful, and athletic look even at higher body weights.

Cognitive Benefits

Many users report notable cognitive side benefits, including improved focus, elevated mood, and a general sense of well-being. This is believed to be due to its activity in the central nervous system.

Potential Neuroprotective Effects

Preclinical research indicates RAD-140 may have protective effects on neural tissues, a unique characteristic among SARMs that contributes to its research profile beyond bodybuilding.

RAD-140 Side Effects

The potency of RAD-140 comes with a significant and pronounced side effect profile that demands serious respect and management.

Potent Suppression of Natural Testosterone

RAD-140 is highly suppressive, often considered one of the most suppressive SARMs. It profoundly lowers LH and FSH, leading to a sharp decline in endogenous testosterone. A comprehensive and proactive Post-Cycle Therapy (PCT) is absolutely mandatory.

Estrogen Imbalance and Risk of Gynecomastia

While RAD-140 does not aromatize, the severe testosterone suppression can create a state of relative estrogen dominance. This imbalance can trigger estrogenic side effects, including gynecomastia (development of breast tissue) and water retention, in susceptible individuals. An Aromatase Inhibitor (AI) may be necessary on-cycle for some.

Significant Negative Impact on Lipid Profiles

It is harsh on cholesterol. RAD-140 aggressively suppresses HDL (“good”) cholesterol and can elevate LDL, posing a notable risk to cardiovascular health. This effect requires diligent management with support supplements and diet.

Hepatotoxicity (Liver Stress)

It can cause significant elevations in liver enzymes (ALT/AST). Liver support supplements (e.g., TUDCA, NAC) are non-negotiable components of a responsible cycle.

Hair Loss (Androgenic Alopecia)

Despite being a SARM, RAD-140 exhibits enough androgenic activity to potentially accelerate male pattern hair loss in those genetically predisposed. This is a more common complaint with RAD-140 than with many other SARMs.

Insomnia and Aggression

The pronounced stimulatory and cognitive effects can, for some users, translate into irritability, heightened aggression, or difficulty sleeping, especially if dosed too late in the day.

How to Take RAD-140

Discipline is paramount with this potent compound. A conservative approach is necessary to harness its benefits while mitigating its strong side effects.

RAD-140 Cycle Length

8 weeks is the standard and strongly recommended maximum for a first cycle. Its potency and suppressive nature make longer cycles exponentially more challenging to recover from.

RAD-140 Dosage for Men

5 mg to 20 mg per day, taken orally. A dose of 10 mg per day is widely regarded as the optimal balance of high efficacy and manageable side effects. Doses of 15-20 mg are for very experienced users and come with a steep increase in side effects. Starting at 5-10 mg is critical.

Dosage for Women

Not recommended. Due to its high androgenic potential and potency, the risk of virilization (voice deepening, clitoral enlargement) is extreme.

Best Stacks with RAD-140

RAD-140 serves as a powerful base for stacks aimed at strength and quality mass. Its half-life is approximately 16-24 hours, supporting once-daily dosing.

The Ultimate Strength & Hardness Stack

RAD-140 + YK-11. This is an extremely advanced and potent stack. RAD-140 provides strong AR activation, while YK-11 (a myostatin inhibitor) may further enhance hypertrophy by blocking growth limiters. It is very demanding and suppressive.

The Quality Mass Stack

RAD-140 + MK-677 (Ibutamoren). A superb combination for adding lean size. RAD-140 drives the anabolic growth and strength, while MK-677 enhances recovery, sleep, and appetite, creating an ideal environment for muscle accrual without excessive water retention.

The Recomposition Stack

RAD-140 + Cardarine (GW-501516). For a lean bulk or recomp, Cardarine’s endurance and fat-burning effects complement RAD-140’s hardening and strength benefits, helping to manage body fat during a massing phase.

RAD-140 Cycle Guidelines

This table outlines a prudent 8-week male protocol. Begin comprehensive liver, heart, and hormone support from day one.

Week	Daily Dosage	Phase Focus & Notes
1	5 mg – 10 mg	Starting low (5mg) to assess tolerance for side effects like aggression, insomnia, or headaches.
2-7	10 mg	This is the primary window for gains. Strength and muscle density increase rapidly. Suppression and other side effects become fully established.
8	5 mg – 10 mg	Maintain or slightly reduce dose to solidify gains and begin preparing the body for the intense recovery of PCT.
Post-Cycle	Begin PCT	Start a strong SERM-based PCT (Nolvadex/Clomid) within 3-4 days of your last dose. Blood work 5-6 weeks post-PCT is crucial.

Results to Expect with RAD-140

A well-executed RAD-140 cycle delivers hard, impressive results. Expect to gain 5-12 pounds of very lean, dense muscle tissue over 8 weeks, with a dramatic increase in strength often exceeding 10-15% on major lifts. 

The physique becomes harder, more vascular, and more defined, with muscles appearing fuller and more separated. The “dry” quality of the gains means less post-cycle water weight loss, helping to solidify a more permanent-looking transformation.

These results are contingent on a sufficient caloric intake and intense, progressive resistance training.

Compliance and Security (Canada)

• RAD-140 is an unapproved new drug under Canada’s Food and Drugs Act. NEO SARMs is selling RAD-140 as a research chemical only.
• It is not a controlled substance under the Controlled Drugs and Substances Act (CDSA). Simple personal possession is not a criminal drug offense.
• It is strictly prohibited by the World Anti-Doping Agency (WADA).