OmniMass - Xeno Laboratories

Buy OmniMass by Xeno Labs at XSteroids. OmniMass is the heavy end of the Xeno blend line, a mass-oriented injectable supplied as one 10 ml vial and catalogued by its maker as a steroid blend at 300 mg per ml. This page sets out what the product is, how a blend of that type behaves, the shape of a mass phase, how the volume is chosen, what it is stacked with, and how recovery is handled.

Be clear about the limit of the information available. Xeno Labs publishes the strength and the words steroid blend, but does not name the individual compounds or their milligrams, so the exact composition is not disclosed. Only the total of 300 mg per ml is documented here, and nothing below invents a breakdown. The product is a prescription-class anabolic, banned at all times in sport, and it is offered as a research item.

What Xeno OmniMass Contains and What You Are Buying

OmniMass is a single 10 ml multi-dose vial of oil, listed by the manufacturer at 300 mg per ml of a blend it labels simply as a steroid blend. That works out at about 3000 mg of combined active material in the bottle. The name and the positioning point clearly at a size and mass product, yet the label stops short of naming which esters or compounds sit inside.

Because the maker does not publish the ingredients or their individual milligrams, the only documented figure is the total strength, and this page repeats just that. No independent laboratory result for this vial appears in any public source either, so the description stays with how a mass-oriented blend of this class is understood to behave instead of asserting a verified formula.

How a Multi-Ester Mass Blend Works

Mass blends follow the same logic as any mixed-ester injectable. The active hormone travels in oil, esterase enzymes in muscle release it at a rate set by each ester's length, and a combination of lengths spreads release across days and weeks, so one or two injections a week can hold a fairly steady level [2][3]. A lower total strength such as 300 mg per ml also means a moderately larger injection volume for a given dose than a 500 mg per ml oil would require.

Beyond that general mechanism, the route depends on which compounds the blend carries, and that is exactly what the maker leaves unstated. Compounds that aromatise raise estradiol and water; 19-nor compounds such as nandrolone or trenbolone do not aromatise the same way but suppress the axis and can raise prolactin. Without a published composition, none of those pathways can be assigned with confidence, and this description does not pretend otherwise.

What to Expect From a Mass-Oriented Blend

Expect a fuller, heavier look rather than a dry one, assuming the blend follows the mass framing its name suggests. Blends aimed at size commonly produce a quicker weight shift from water and glycogen alongside lean tissue, and appetite often climbs. Because so much of the early change is fluid, the scale overstates tissue gain, and the honest measure is what remains after the cycle ends.

Suppression of natural testosterone is a certainty with any anabolic blend, and the harder the total load, the longer the recovery window tends to be. Blood pressure, hematocrit and the lipid panel are the markers most likely to move, consistent with what is documented for testosterone and anabolic steroids generally [4][5]. Individual response will hinge on the undisclosed components, which is a genuine limitation of buying a blend whose formula is not published.

Dosing a 300 mg/ml Blend in Practice

At 300 mg per ml the arithmetic is straightforward: 1 ml carries 300 mg and 0.5 ml carries 150 mg. Weekly totals in community use vary widely because the components are unknown, so a mass blend is usually dosed by volume and adjusted against bloodwork rather than by a fixed milligram target. One or two injections a week is the common pattern for a blend of this kind.

Why the unknown matters for dosing

With a single known ester, 400 mg a week means 400 mg of one named hormone. With an undisclosed blend, 400 mg a week is 400 mg of something the buyer cannot name, which makes both expected results and side effects harder to predict. A lower starting volume and a conservative ramp is the reasonable response to that uncertainty.

Following the numbers

Whatever volume is used, blood pressure, hematocrit and estradiol belong on the monitoring list before the first injection and again a few weeks in. Adjusting by measurement rather than by feel is the only way to steer a product whose internal composition is a mystery [4].

Building an OmniMass Stack

A mass blend that already combines compounds usually needs little added on the anabolic side, so a stack is more often about support than about more gear. Aromatase control with Arimidex (anastrozole) is held until an estradiol reading justifies it, and a SERM covers the recovery phase rather than the cycle itself.

Comparing the range helps set expectations: Testosterone Esters from Xeno Labs give a known single-ester base, MegaTest and SuperTest are testosterone-only blends with published totals, and Nandrolone Esters add a 19-nor when joint comfort and size are the goal.

PCT and Recovery After OmniMass

A recovery plan has to assume a long clearance, because a mass blend with any slow ester keeps releasing hormone for two to three weeks afterwards. A SERM started too early competes with testosterone still arriving, so the customary wait is until the esters have cleared, followed by four to six weeks of therapy [3][4].

Tamox (tamoxifen) or clomiphene from the same range carries the restart. Since the exact makeup of OmniMass is not published, the safest assumption is that suppression is at least as heavy as a comparable testosterone cycle, and bloodwork should confirm that luteinising hormone and total testosterone have returned before another run is considered.

OmniMass Side Effects and Precautions

Anabolic blends of this class share a common risk set: elevated blood pressure, a rising hematocrit, unfavourable lipid shifts, acne, water retention, suppression of natural testosterone and effects on mood, with the FDA issuing a class-wide blood pressure warning for testosterone products in February 2025 [5][4]. Reduced fertility and a change in testicular size follow the suppression.

There is an extra caution specific to OmniMass: because the composition is not published, a buyer cannot know whether a 19-nor sits in the blend, and 19-nors bring prolactin-side concerns that a testosterone-only product does not. Buying an undisclosed formula is a real unknown and one reason to keep exposure short. Sport bans these compounds at all times under WADA class S1, and nothing on this page is medical advice [9].

Storage Instructions

An oil-based vial keeps best standing upright, tightly capped, in a dry cupboard away from sunlight, at ordinary room temperature. There is no reason to refrigerate it and every reason not to freeze it. Before the first use and again before each draw, hold the vial to the light and check that the oil is clear and free of particles, and confirm the expiry date and batch number.

Why Buy Xeno OmniMass from XSteroids?

OmniMass belongs to the Xeno Labs catalogue stocked on this site, where the blends, the single-ester testosterone vials and the recovery products all sit together, so a plan can be assembled in one order. Checkout is encrypted and shipping is discreet; parcels bound for US addresses normally arrive within three to six days, while international shipments take twelve to twenty-six. The cards collected below show the products most often discussed alongside this blend.