Primobolan vs RAD-140: side-by-side comparison
Primo · Methenolone · Methenolone Enanthate
A DHT-based steroid favored for its high safety profile and low side-effect burden. Often used in high doses for lean mass preservation. Long rumored in bodybuilding lore to have been Arnold Schwarzenegger's favorite steroid.
Testolone · RAD140 · Vosilasarm
Designed to provide the benefits of testosterone in muscle and bone without prostatic effects. One of the most potent SARMs available, providing significant lean mass and strength gains.
6 / 10 natty scale / 6
Same lane
Both sit in the same class and are run for recomposition. This is a like-for-like comparison: read the gaps as real trade-offs.
The tape
Core ratings
The same three rulers every entry on the site is scored with, read head to head.
Natty scale
1 natural · 10 heavy
Effectiveness
Documented effect · of 5Δ0.5
Side-effect severity
Documented burden · of 5Δ1.5
Cost side
Body-load fingerprint
Where each one actually lands its strain, on the calculator's thirteen channels. Tap a row for what it means and which labs track it.
Cardiometabolic
Organ strain
Hormonal
Systemic
Injection & site care
Bars show strain at each one's typical protocol, not your dose. ≈ marks values inferred from side-effect data or category rather than hand-graded. For your numbers, run the calculator.
Logistics
The vitals
Benefit side
What each is for
Shared goals carry both dots; a goal with one dot belongs to that side alone.
Run for
Documented upside
- No estrogen conversion (no gyno or water retention)
- Mild on hair (compared to other DHT derivatives)
- Good for cutting and maintaining lean mass
- Relatively safe for long cycles
- Suitable for women at low doses
Run for
Documented upside
- Significant lean mass gains
- Dramatic strength increases
- No water retention
- No estrogen conversion
- Oral administration (no injections)
The downsides
Side effects, aligned
Each entry's documented side effects, sorted onto the same body systems so the gaps and the overlaps are visible. Tap any effect for the detail.
None documented
None documented
None documented
None documented
None documented
None documented
The exit
Hormonal fallout & recovery
What each does to your own hormone axis while on, and what leaving it costs.
Primobolan
Standard PCT required. Due to long half-life, wait 2-3 weeks after last injection before starting PCT.
RAD-140
PCT with Enclomiphene (12.5-25mg daily) or Nolvadex (20/20/10/10mg) for 4 weeks is recommended.
Read-out
How they separate
- 01
Enhancement
They land at almost the same point on the natty scale (6/10 vs 6/10): a similar distance beyond natural.
- 02
Side-effect bill
RAD-140's documented side-effect severity is heavier (3.5/5 vs 2/5). The body-load fingerprint above shows where that weight actually lands.
- 03
Body load
The widest gap at typical protocols is liver strain (RAD-140 5.5/10 vs 0/10), then cholesterol / apob (RAD-140 7.8/10 vs 2.8/10).
- 04
Coming off
Both suppress natural testosterone production: coming off either means a recovery phase, not just stopping.
- 05
Logistics
Primobolan runs as injectable (im), RAD-140 as oral; typical runs are 12-20 weeks vs 8-10 weeks.
- 06
Tested athletes
Both are WADA-prohibited: neither belongs anywhere near tested competition.
Generated from each entry's data file. Descriptive, not a recommendation; nothing here is medical advice.