10ml Vial in Box

Primobolan, Primo as it is most often referred to, is an extremely popular and effective steroid that can be safely used by both men and women. 

An excellent choice for first time users due to its mild nature. 

For Women, PRIMO is an excellent product to use as it is nearly always well tolerated by females for mass building. Not to worry those ladies who do not want to pile on additional poundage, by keeping the dose moderate and controlling your diet, the amount of mass gained can easily be controlled to the desired level. 



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The safest Steroid of All


ONARMOR facts, about using Primo 100mg

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.  

PRIMO is a very safe product, suitable for both Men and Women and an excellent choice for first time users due to its mild nature, and those wanting to limit the risk of any unwanted side effects, certainly the first time of running a steroid cycle.

PRIMO has many great characteristics, which should not be overlooked by those people who favour products such as Testosterone and Nandrolone. Most of the advantages of PRIMO come from the low androgenic rating of PRIMO and from the fact that it does not convert to estrogen. Estrogen side effects are usually not experienced at all with PRIMO. Those prone to gynecomastia, or worried about developing Gyno, should be fine with PRIMO and those who suffer from water retention should notice a big difference too, as it is normal to get no water retention when using PRIMO at all. The increase in size, when using this fine product, will be good high quality muscle mass, and not the smooth large look to muscle size which can accompany the use of such steroids as Testosterone.

PRIMO offers the same characteristics as found in all AAS products:

·       Enhanced Protein Synthesis

·       Increased red blood cell count

·       The reduced effect of glucocorticoid hormones.

PRIMO also provides:

·       Huge nitrogen retention

o   Low nitrogen levels will lead to a catabolic state, where as the more nitrogen we retain the more anabolic we are, where the energy is retained for muscle growth and repair.

·       Strong Binding Affinity to the Androgen receptor

o   Strong binding affinity for the androgen receptor promotes direct fat loss

·       Improved Immune System

The ability of PRIMO to enhance the immune system can also be very beneficial to every day steroid users. If your immune system is stronger, you’ll be healthier and have an easier time reaching your goals. But in the case of a cutting cycle it can be extremely valuable as immune systems often become a little weaker during a hard diet.

For women, PRIMO is an excellent product as it is nearly always well tolerated by females, for mass building. However, not to worry those females that do not want to pile on the extra poundage, by keeping the dose moderate and controlling your diet, the amount of mass gained can easily be controlled to the desired level.

Structural Characteristics:

PRIMO is Methenolone with an added or attached Enanthate ester. This ester is added in an effort to control the hormone’s release time slowing it down substantially. PRIMO carries one of the highest safety ratings among all anabolic steroids. This steroid is relatively mild and can be safe for both men and women. PRIMO is well-known for having a solid record in the treatment of muscle wasting diseases, osteoporosis and sarcopenia, and is a great steroid for treating prolonged corticosteroid exposure. PRIMO has also been used effectively in the treatment of carcinoma, as well as hepatitis in some cases.

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

The best and most common time to use PRIMO is for cutting, for men and women. PRIMO is an absolutely fantastic, and established old favourite, steroid for ensuring our muscle mass is protected and fat is lost at an accelerated level during the cutting phase.

Once body fat % is down to a suitable low level PRIMO will ensure a very hard and defined look to any physique. PRIMO can be the difference between a good and superb look at the end of the cutting phase.

In lots of ways PRIMO will do everything that Testosterone and Mast will do, but in a far softer, gentler manner, reducing stress upon the users system and without the worry of increased estrogen and water retention. It is a good product for athletic enhancement. It has the ability to promote increases in strength and will have a positive effect on muscular endurance and recovery. Which makes it a good product for those people who are worried about the effect of using steroids upon their ability to compete in their given sport where a level of stamina is essential. Of an equal importance to these people PRIMO is not a massive mass builder, which many athletes, such as boxers, do not want or require as it can hinder the whole training process. . 


ONARMOR PRIMO is dosed at 100mg/ml.

A minimum dosage for men would be 100-200mg per week, a level that should produce at least some noticeable muscle growth, but not a great amount. Among athletes, men may respond to weekly doses of 200mg but regular users will often inject much higher doses looking for a stronger anabolic effect. In our experience, men will be looking at a dosage of 800 – 1000mg per week at which they will be happy with the results, whilst still benefiting from the mild sides of PRIMO.

Women respond well to a dosage of 50-100mg per week. If stacking, it would be best to use a much lower starting dosage for each drug than if they were to be used alone. This is especially good advice if you are unfamiliar with the effect such a combination.

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.

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.


It is popular for men to stack PRIMO with stronger, non-aromatizing, products such as TREN ACE, for a more enhanced effect. The strong androgenic component should help to bring about an added density and hardness to the muscles. Many also stack with WINSTROL, a mild steroid in terms of side effect, but a strong product in terms of strength and results. This stack should provide the user with a reasonable increase of muscle mass and hardness, however, unlike the stack with TREN ACE, the side effects should be quite limited.

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Data sheet

Country of Origin
Pharmaceutical Ingredients
Methanolone Enanthate 100mg/ml