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DECA 300

DECA 300


Nandrolone Decanoate 300mg/ml
10ml Vial

Anabolic / Androgenic Rating: 125:37

DECA 300 is Nandrolone Decanoate, a modification of testosterone, with an Anabolic/Androgenic ratio of 125:37, meaning it is highly anabolic and moderately androgenic. It only aromatizes (converts to estrogen) slightly, at about 20% the rate of testosterone. Estrogenic sides are not a major concern. It is one of the most popular anabolic steroids. Brilliant product for joints during heavy bulking periods of training. 


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Deca 300

A solid bulking and strength product with joint support


ONARMOR facts, about using Nan Deca 300mg

General Description

ALL On Armor injection Oils are adapted to incorporate a pH balanced formula that should reduce/eliminate pain at the point of injection.  

Nandrolone Decanoate, most commonly referred to as “DECA”, always has been an extremely popular product in bodybuilding and performance training circles and is probably one of the most used. It is most often used during the off-season mass building product and also as a product that does offer many supporting therapeutic effects to the person using it as part of their steroid supplementation and overall training program. With this product Nandrolone is attached to the Decanoate ester, which vastly slows down the hormone’s release rate into the body meaning less frequent injections. When using NAN DECA there is a sharp rise of Nandrolone released in the first 24-48 hours after which the hormone will continue to be released into the body for approximately 2-3 weeks.

Nandrolone is more ANABOLIC than Testosterone and far less ANDROGENIC. This makes NAN DECA a much milder steroid than Testosterone and one of the safest and easily -tolerated anabolic steroids. NAN DECA does aromatize, but only at small proportion when compared to that of Testosterone.

Like many anabolic steroids, NAN DECA has the ability to enhance protein synthesis, inhibit glucocorticoid hormones, and promote enhanced IGF – 1 output. Like many anabolic steroids, the administration of Nandrolone into the body greatly increases nitrogen retention in the muscle tissue. Nitrogen retention allows more protein to be absorbed into the system which essentially instigates the building of lean muscle tissue. All steroids increase nitrogen retention but Nandrolone does have a stronger affect than many steroids in this regard. When nitrogen levels are not maintained, this can cause us to enter a catabolic (muscle wasting) state.

NAN DECA however offers significant other significant benefits for users, and these benefits alone often justify its inclusion in any training phase but especially the bulking phase where the likely hood of lifting heavier is more likely. The therapeutic benefits of NAN Deca are:

·       Joint Repair and Joint Pain Relief

·       An Increase in red blood cell count

·       Improves fatigue and tiredness issues

·       Anti-Aging Benefits


When you start to fully consider the health and ultimately the training benefits of NAN DECA, you start to wonder why you haven’t incorporated into more of your supplement stacks.

With bodybuilders and serious gym goers in mind, the most common use of NAN DECA is for bulking during the off-season or winter training objective.


Structural Characteristics:

NAN DECA, structurally is very similar to Testosterone, however, it lacks a carbon atom at the 19th position (hence its other name, 19nortestosterone). Nandrolone exhibits higher anabolic properties. Unlike testosterone, however, its tissue-building activity is accompanied by weak androgenic properties which lay testament to NAN DECA’s ability to promote significant strength and lean muscle mass gains without strong androgenic or estrogenic side effects.

NAN DECA is a modified version of Nandrolone, Decanoate ester is attached to the 17-beta hydroxyl group. Nandrolone Decanoate provides a sharp spike in Nandrolone in the body 24-48 hours following injection, which steadily declines to near baseline levels approximately two weeks later.

The half-life of Nandrolone Decanoate 300 is approximately 8 days after injection.

Nandrolone has a low tendency for estrogen conversion, estimated to be only about 20% of testosterone. therefore, estrogen side effects are a much lower concern. lt is also important to point out that due to its mild androgenic nature and the effect of suppressing natural levels of testosterone production, nandrolone is prone to interfering with libido in men, however, this can be combated by stacking with another product such as Testosterone.

Cutting through the Jargon, what is it like in practice?

NAN DECA has been a solid choice product for bodybuilders and strength athletes for a long number of years. The inclusion of any ONARMOR testosterone product into any cycle or stack containing NAN DECA or NPP is a good choice, in fact, in our opinion an essential choice for male users who wish to maintain any level of sex life. NAN DECA is an easy product to use and works well for any athlete looking to increase the amount, dosage, of steroids he is using, without increasing the side effects.  It will also help with any joint pain or soreness that the user might suffer whilst increasing their training regime with perhaps heavier weights and lower rep ranges. Slight water retention can occur for some people but this can be overcome with the use of a suitable Aromatisation Inhibitor such as Anastrozole.

·       Physical Benefits of Using Nandrolone

·       Increased Strength:

·       Increased Muscle Mass

·       Increased Recovery

·       Increased Levels of IGF-1

·       Higher energy levels and less fatigue

·       Joint Repair and Joint Pain Relief

·       An Increase in red blood cell count

·       Anti-Aging Benefits

·       Lower Liable Side Effects

·       Allows users to increase Anabolic Advantage

NAN DECA has a high dose at 300mg/ml is ideal for a massive cross section of trainers and advanced gym goers. The long Decanoate ester and subsequent slower absorption rate means less frequent administration. Experienced users can increase weekly overall weekly dosages by adding more NAN DECA into their weekly stack perhaps replacing some of the dosage of other products in the event. This will lead to a significant reduction in the likelihood of any side effects despite the increased intake. .


ONARMOR NAN DECA is dosed at 300mg/ml.

The usual dosage among most athletes is in the range of 300 - 600 mg per injection, depending upon the size of barrel (syringe) used 1 or 2.5ml. A normal dosage for this product would be 300 – 600mg.

Please note: all ONARMOR products are exactly dosed and may exceed the dosages experienced with other similar products by other manufacturers. We would suggest starting at a lower dosage and increasing steadily throughout the weekly course. Should you experience any adverse side effects at higher dosages this will allow you to “back off” the dosage down to a level that you are ok with.

In general terms we would suggest the following weekly dosages for maximum muscle mass

Beginner       300 mg/wk

Advanced Beginner 600mg / wk

Advanced 900mg +

Note: good, hygienic, injection practice should be applied at all times. All sites should be clean (it is a good practice to carry out administration after showering or taking a bath) and should be treated with a wipe. Do not attempt to use previously used equipment or share equipment. It is good practices to have someone else, responsibly, administer injections.


ALL Nandrolone products should be incorporated into a stack that contains at least some form of Testostorone, such as Test 400, to avoid the effects of zero natural testosterone production. Generally speaking Nandrolone is better suited for mass building/bulking stacks but it can (despite popular misconceptions) be used with a cutting phase. We have included here a brief list of the products it will stack well with, however, only from a bulking perspective. For help and advice upon the use of this product for cutting we would ask that you refer to our blog and discussion board.




Test Cyp, Enan, 400, Test Sus


Nan Deca 300


Naps 50





ON Armor
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Data sheet

Country of Origin
Pharmaceutical Ingredients
Nandrolone Decanoate

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