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Primbol 100mg/ml 10x1ml Ampullen by Raw Pharma
HPLC Verified

Primbol 100mg/ml 10x1ml Ampullen by Raw Pharma

Raw Pharma Primbol delivers Methenolone Enanthate at 100 mg/ml in single-dose ampoules, purpose-suited to stacking alongside selective androgen receptor modulators (SARMs) where a low-aromatising injectable anchor keeps total hormonal load predictable. Because SARMs and Methenolone Enanthate engage overlapping but not identical AR-activation pathways, pairing them allows targeted tissue selectivity without compounding estrogenic side-effect burden. Every batch carries HPLC-verified potency certification, with endotoxin clearance confirmed by LAL assay before release — quality documentation delivered through a per-batch Certificate of Analysis rather than a blanket brand claim.

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  • Zero aromatisation keeps estrogenic side-effect burden predictable when stacked with non-aromatising SARMs
  • 100 mg/ml concentration enables 50 mg dose increments for precise weekly titration alongside oral SARM adjustments
  • Single-dose ampoule format protects sterility across twelve-week or longer dual-compound protocols
  • HPLC-verified potency per batch ensures the 100 mg/ml specification holds within pharmacopoeial tolerance
  • LAL endotoxin assay on every production run limits parenteral safety variables in high-injection-frequency SARM stacks
  • Twice-weekly injection schedule compatible with enanthate release kinetics reduces total injection events alongside daily oral SARM dosing
  • 10-ampoule pack provides a structured five- to ten-week supply matched to common SARM cycle lengths

Key takeaways

  • Combine Primbol with SARMs to add lean-mass signalling without extra estradiol load.
  • Verify HPG suppression depth via LH and FSH immunoassay at week four.
  • Choose 100 mg/ml for maximum syringe-scale precision during SARM co-titration.
  • Use single-dose ampoules to eliminate repeated-puncture contamination across long cycles.
  • Confirm batch potency through HPLC and endotoxin clearance via LAL assay.

Methenolone Enanthate as an Injectable Base in SARM Stacks

Raw Pharma Primbol functions as the injectable hormonal anchor in SARM-inclusive protocols, providing sustained androgen receptor occupancy through systemic Methenolone Enanthate delivery while SARMs handle tissue-selective satellite signalling at the muscle level. Unlike testosterone-based bases, Methenolone Enanthate contributes zero aromatisable substrate, meaning estradiol load in the stack rises only from any testosterone used to maintain physiological replacement levels — not from the Primbol component itself. This makes Primbol the mechanistically cleanest option when a user wants to preserve the dry-tissue advantage that SARMs are partly selected for in the first place.

How Methenolone Enanthate and SARMs Interact at Receptor Level

Methenolone Enanthate occupies the androgen receptor through full agonism with a measured anabolic-to-androgenic selectivity ratio confirmed across receptor-binding assays; SARMs such as LGD-4033 or RAD-140 engage the same receptor but through partial-agonist or tissue-biased conformations that differ structurally from steroidal ligands. The two classes therefore do not simply duplicate each other's signal — instead, Primbol provides the baseline systemic anabolic tone and LH suppression management, while the SARM layer adds tissue-selectivity effects that injectable Methenolone alone cannot fully replicate. Bloodwork monitoring of LH, FSH, and total testosterone at weeks four and eight of a combined block quantifies suppression depth attributable to both agents together, since SARMs independently suppress the HPG axis to a degree measurable by immunoassay.

SARM Combination Protocols and the Role of 100 mg/ml Concentration

In practice, the most documented Primobolan-plus-SARM configurations pair 200–300 mg per week of Methenolone Enanthate with either LGD-4033 at 5–10 mg daily or Ostarine (MK-2866) at 12.5–25 mg daily, with the injectable component providing hormonal continuity and the SARM providing incremental lean-mass signalling confirmed by DEXA-scan data in structured user reports. Compared to pairing a SARM with a testosterone ester at equivalent weekly milligrams, replacing testosterone with Methenolone Enanthate measurably reduces serum estradiol — a shift confirmable via LC-MS/MS estrogen assay — without sacrificing nitrogen retention. Raw Pharma's 100 mg/ml concentration supports this context directly: each 0.5 ml graduation in a standard 1 ml syringe delivers 50 mg, enabling the fine weekly adjustments needed when an SARMs dosing adjustment simultaneously changes the overall anabolic stimulus.

Quality Infrastructure Supporting Multi-Compound Protocols

Raw Pharma subjects each Primbol production batch to HPLC potency analysis verifying that active-ingredient content falls within pharmacopoeial tolerances for the 100 mg/ml specification, followed by LAL endotoxin testing before batch release. In multi-compound protocols involving daily oral SARMs, injection frequency from the injectable base is deliberately kept to twice-weekly — the enanthate ester supports this schedule — limiting cumulative parenteral endotoxin exposure across the cycle. Each ampoule format removes the repeated-puncture variable present in multi-dose vials, a sterility consideration that becomes proportionally more relevant when the cycle runs twelve or more weeks alongside research-grade oral compounds.

Usage

  1. Confirm baseline bloodwork before the first injection: LH, FSH, total testosterone, estradiol (LC-MS/MS), ALAT, ASAT, and haematocrit — this panel benchmarks the combined suppression attributable to both Primbol and the co-administered SARM.
  2. Select the SARM partner before opening the first ampoule — LGD-4033 (5–10 mg daily) or Ostarine MK-2866 (12.5–25 mg daily) are the most protocol-documented options with injectable Methenolone Enanthate; start the SARM on the same day as the first Primbol injection.
  3. Draw the Primbol dose using a 1 ml syringe: at 100 mg/ml each 0.5 ml graduation equals exactly 50 mg, enabling precise adjustment without recalculation when the SARM dose is simultaneously changed.
  4. Inject intramuscularly (gluteal or vastus lateralis) twice weekly on a fixed schedule — a Monday/Thursday split is commonly used — keeping injection volume per site at or below 2 ml for comfort.
  5. Take the oral SARM at a consistent time daily, ideally with a meal; do not adjust the SARM dose and the Primbol dose simultaneously — change one variable per four-week assessment period to isolate which agent is driving any observed change.
  6. Run repeat bloodwork at weeks four and eight covering the full baseline panel plus HOMA-IR if the SARM selected has documented metabolic interaction; use results to decide whether to extend, taper, or modify dosing before the final cycle week.

Warnings

Contraindications: Primbol is contraindicated in individuals with androgen-sensitive prostate or breast pathology, active hepatic impairment, or a history of hypersensitivity to Methenolone or sesame/castor-oil vehicle components. SARMs are research compounds with incomplete long-term human safety data; their combination with injectable androgens is not medically approved and carries regulatory status that varies by jurisdiction.

Side Effects: Methenolone Enanthate suppresses endogenous LH and FSH; co-administration of any SARM deepens suppression further, making recovery timelines longer than with either agent alone. Mild androgenic effects (scalp sensitivity, sebaceous activity) are possible at higher weekly doses. SARMs independently can transiently suppress HDL cholesterol — monitor lipid panels at week four since Methenolone also modestly influences the HDL/LDL ratio.

Monitoring: Required bloodwork during the cycle: LH and FSH (immunoassay) at weeks 4 and 8; estradiol by LC-MS/MS; haematocrit; ALAT and ASAT; lipid panel. If combining with any oral SARM with documented hepatic signal, schedule ALAT/ASAT at week two rather than four. DEXA or caliper-based body composition measurement every four weeks tracks lean-mass response independently of scale weight.

PCT: Begin PCT no earlier than 14 days after the final Primbol injection to allow adequate ester clearance. Discontinue any SARM four to seven days before the final Primbol injection so that SARM plasma levels have declined before SERM initiation. Standard SERM protocols (Nolvadex or Clomid) apply; confirm HPG recovery by LH and FSH immunoassay four weeks into PCT before discontinuing SERM.

Frequently asked questions

Can Methenolone Enanthate injectable be combined safely with SARMs in the same cycle?
Yes, the combination is mechanistically compatible. Methenolone Enanthate provides systemic androgen receptor occupancy and HPG suppression management while the SARM layer adds tissue-selective signalling. Because Methenolone does not aromatise, combining it with non-aromatising SARMs keeps estradiol load low throughout the stack, confirmed by LC-MS/MS estrogen assay at weeks four and eight.
Which specific SARMs are most commonly paired with Primobolan injectable in documented protocols?
LGD-4033 at 5–10 mg daily and Ostarine (MK-2866) at 12.5–25 mg daily are the most frequently cited SARM partners for injectable Methenolone Enanthate. Both compounds add lean-mass signalling through tissue-biased AR conformations distinct from Methenolone's full-agonist steroidal binding, making the stack mechanistically additive rather than redundant.
What bloodwork markers should I track when running Primbol alongside a SARM?
LH and FSH via immunoassay at weeks four and eight measure combined HPG suppression depth from both agents. Serum estradiol by LC-MS/MS confirms that Methenolone's non-aromatising profile holds under real-cycle conditions. Total testosterone and haematocrit provide safety margins; ALAT and ASAT flag hepatocellular stress if oral SARMs with known hepatic interaction are co-administered.
Why does the single-dose ampoule format matter specifically in a long SARM combination cycle?
In cycles extending beyond ten weeks — common when SARMs are included for sustained lean-mass accrual — each injection event introduces a sterility variable. Raw Pharma Primbol's 1 ml ampoule format is sealed at production, eliminating the cumulative contamination risk that builds across repeated punctures of a multi-dose vial. The 10-ampoule pack provides a structured ten-week supply at one injection per week or a five-week supply at twice-weekly dosing.
How does Primbol's 100 mg/ml concentration compare to higher-density Methenolone products when dose-adjusting during a SARM stack?
At 100 mg/ml, each 0.5 ml graduation delivers exactly 50 mg — the smallest practical weekly adjustment increment when simultaneously titrating a SARM dose. Higher-density formulations compress volume, which reduces syringe-scale readability for low-dose adjustments. Primbol's 100 mg/ml specification is the lowest available in the injectable Methenolone category, making it the most syringe-precise option for fine-tuned dual-compound titration. (2) angle_used

Manufacturer

Raw Pharma's product portfolio is structured around distinct formulation lines rather than a single monolithic catalogue — Primbol sits within the company's injectable enanthate-ester line, which is differentiated from the shorter-ester and oral lines by container format (single-dose ampoule versus multi-dose vial) and by the quality documentation requirements applied at release. Each line carries its own batch-release checklist: the injectable enanthate series mandates HPLC potency verification against the declared concentration specification and LAL endotoxin assay clearance before a Certificate of Analysis is issued, rather than relying on the same CoA template used for the oral or short-ester injectable products. This line-specific approach to documentation means that Primbol's quality record is maintained separately from other Raw Pharma active ingredients, allowing per-batch traceability without cross-product quality pooling.

Product details

BrandRaw Pharma
Active ingredientmethenolone enanthate
Also known asPrimobolan Depot, Primo, Methenolon Enanthat, Primbol, Raw Pharma Primobolan Depot
Strength100 mg
FormAmpullen
Pack size10 pieces
Item numberINJ-METE-RAW-100-021

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