1-Testosterone (Dihydroboldenone)
1-Testosterone, also known as dihydroboldenone, is a potent anabolic-androgenic steroid derived from boldenone and structurally similar to Primobolan (methenolone). Unlike Primobolan, it lacks the 1-methyl group, which affects oral bioavailability.
Mechanism & Properties
1-Testosterone is a dihydrotestosterone (DHT) derivative with an additional double bond between carbons 1 and 2, stabilizing the 3-keto group and increasing anabolic activity. It is considered non-estrogenic, meaning estrogen-related side effects like water retention or gynecomastia are generally absent.
Standard studies show it to be roughly twice as anabolic as testosterone while maintaining similar androgenicity. This gives it a high anabolic-to-androgenic ratio, making it valued for lean, quality muscle gains without water bloat.
Effects
- Lean muscle mass gains and fat reduction
- Twice as anabolic as testosterone
- No estrogenic side effects (no gyno or water retention)
- Significant strength improvements
- Good for both bulking and cutting
Potential Side Effects
- Oily skin or acne
- Injection site irritation
- Body/facial hair growth, male pattern hair loss
- For women, virilizing effects are possible
- Altered cholesterol levels (reduced HDL, increased LDL)
- Rarely elevated blood pressure
- Mild liver stress possible
Profile
- Half-life: 6–8 days
- Administration: Injectable or transdermal
Storage & Safety
- Keep out of reach of children
- Store in a cool, dry place away from sunlight
- Do not use after expiry date
- Contraindicated in pregnancy, breastfeeding, prostate or breast carcinoma, high calcium, or hypersensitivity
Note: 1-Testosterone is not approved for human use. This information is for educational purposes only.





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