Geneza GP Deca and Phenyl - Nandrolone 300 and 100 Vials

Name: Geneza GP Deca and Phenyl - Nandrolone 300 and 100 Vials
Brand: Geneza Pharmaceuticals
SKU: OFFER-8464
Availability: OutOfStock

Injection · 300 mg/ml · 10 ml

Out of stock

Geneza Pharmaceuticals GP Deca and Phenyl is a nandrolone line in two packs: Nandrolone Decanoate 300 for the slow release and Nandrolone Phenylpropionate 100 for the fast one.

Same 19-nor androgen, two different esters, so the choice comes down to injection frequency and how long the level should hold. GMP-manufactured, HPLC-verified and shipped with the batch Certificate of Analysis (COA) on file. Current availability is shown on the page.

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Product overview

Geneza Pharmaceuticals GP Deca and Phenyl - Nandrolone

GP Deca and Phenyl is Geneza Pharmaceuticals' nandrolone line, offered as two ester packs: Nandrolone Decanoate 300 and Nandrolone Phenylpropionate 100. Nandrolone is a 19-nor androgen, a molecule close to testosterone but missing the carbon that changes how it is broken down, and the ester in front of it decides whether the vial acts for days or for weeks. It is usually examined next to a testosterone base, as in Deca 200 / Test E 200, and the same substance appears in Decaplex and Nandroxyl.

Two ester packs: Nandrolone Decanoate 300 and Nandrolone Phenylpropionate 100
Oil-based intramuscular injection
GMP-manufactured and HPLC-verified, Certificate of Analysis (COA) on file per batch
Strongly suppressive to natural testosterone, so recovery planning follows

Variant Comparison

Both packs carry nandrolone; the ester sets the release speed and the injection schedule.

Variant	Dosage	Form and quantity	Best use
Nandrolone Decanoate 300	300 mg per ml	Oil, multi-dose vial	Long release, weekly shots
Nandrolone Phenylpropionate 100	100 mg per ml	Oil, multi-dose vial	Short release, frequent shots

The decanoate pack is the slow one, which is why it is given less often and why the level keeps running for weeks after the last injection. The phenylpropionate pack clears within days, so it gives sharper control: the level follows the shot more closely and falls faster if a protocol is stopped. Users who want a steady background tend to take the decanoate; those who want a quicker exit take the phenylpropionate. The total milligrams needed per week are lower in the decanoate pack per millilitre, so dose arithmetic differs between the two vials as well.

How Nandrolone Works

Nandrolone binds the androgen receptor like other 19-nor androgens and aromatises at only a fraction of the rate of testosterone, so estrogenic effects are milder than with testosterone itself. It also carries moderate progestogenic activity, a property linked to the water retention and prolactin-associated effects reported for this subgroup. It suppresses LH and FSH strongly, so natural production stops and recovery is planned.

Dosage & Administration

No medical dose is stated on this page and neither pack is a licensed medicine in this market, so the figures in circulation are community protocols. The class rule is simple: the phenylpropionate pack is injected more often and the decanoate pack less often, and the decanoate tail means recovery starts later. Estrogen and progesterone effects are managed with an aromatase inhibitor only when it is called for, and recovery is Nolvadex 20 mg daily for four weeks with Clomid as the alternative. Store the vials at room temperature, away from light, heat and moisture.

For laboratory research only. Consult a healthcare professional before use.

Specifications

Trade Name	GP Deca and Phenyl
Generic Name	Nandrolone decanoate, nandrolone phenylpropionate
Manufacturer	Geneza Pharmaceuticals
Dosage	300 mg per ml or 100 mg per ml, depending on the pack
Package	10 ml multi-dose vial, two packs in the family
Drug Class	Injectable anabolic androgenic steroid, 19-nor androgen
Administration	Intramuscular injection
Storage	Room temperature, away from light and heat
Prescription Status	Research use only
Verification	Batch details confirmed with supplier
Shipping	International and U.S. domestic options

Stacks

Decanoate With a Testosterone Base

Nandrolone Decanoate 300 is normally not run alone: a testosterone ester supplies the androgen that nandrolone does not replace, and the long decanoate ester keeps the level steady between weekly shots.

PCT: required - both compounds suppress natural testosterone.

Phenylpropionate for a Short Run

Nandrolone Phenylpropionate 100 suits shorter work, because injections every two or three days hold the level and the compound clears quickly once they stop.

PCT: required - recovery starts after the compound has cleared.

Swapping One Ester for the Other

The two packs are interchangeable in the sense that they carry the same hormone, but not in schedule: moving from phenylpropionate to decanoate lengthens the release, and moving the other way shortens it and speeds the exit.

PCT: unchanged - Nolvadex 20 mg daily for 4 weeks, Clomid as the alternative.

Consult a healthcare professional before any cycle. Doses are common community protocols.

FAQ

Before you ask

Questions, answered

GP Deca and Phenyl is a Geneza Pharmaceuticals nandrolone line in two ester packs: Nandrolone Decanoate 300 and Nandrolone Phenylpropionate 100. Nandrolone is a 19-nor androgen used in laboratory work as a reference compound for that subgroup, and in sports it is taken as a slower, milder-acting alternative to testosterone, always with a testosterone base present.

Only the ester and therefore the speed. Decanoate is the long one: it releases slowly, is injected less often and keeps the level raised for weeks, so the last shot lingers. Phenylpropionate is short: it releases within days, needs more frequent injections and clears quickly, which gives a faster exit if a run has to stop. The hormone itself is identical in both vials.

No medical dosing schedule is published here, because these vials are supplied for research use and not as a licensed medicine. The differences between the packs matter for arithmetic: 300 mg per ml decanoate and 100 mg per ml phenylpropionate need very different volumes for the same milligrams, and the short ester sets a tighter injection interval. Community figures vary widely and should be treated as unverified.

For this class the regulator lists acne, oily skin, hair loss, mood changes, irritability, aggression, sexual dysfunction and shrinkage of the testicles, and more seriously raised blood pressure, heart problems, stroke, liver damage and blood clots. Nandrolone aromatises less than testosterone but carries progestogenic activity, and water retention plus prolactin-associated effects are reported with this subgroup, which is why a testosterone base is normally part of the picture and why recovery planning matters.

Yes. Nandrolone shuts down natural testosterone production, and it is known as one of the more suppressive compounds in the class, so recovery is planned after the last injection. The usual protocol is Nolvadex 20 mg daily for four weeks, with Clomid as the alternative. With the decanoate pack the start of recovery is later, because the ester keeps releasing for weeks.

Yes, both ester packs are listed on this page with international and U.S. domestic shipping options. The page currently shows this offer as out of stock, so the stock label is the figure to watch, and orders ship discreetly once the pack is restocked. Check the stock label of the pack you want before ordering, because the two esters can sell out and be resupplied at different times.

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