Testo Base 100 – Testosterone Base

Testo Base 100 is testosterone in its raw, esterless form, made by Syncom Labs at 100 mg per millilitre as an injectable suspension. With no ester attached to slow release, it enters the bloodstream almost immediately and clears within hours rather than days. This gives it the fastest onset of any testosterone product, which is why it behaves so differently to an esterified version like enanthate or cypionate.

Because it clears within hours, testosterone base has to be injected daily to keep blood levels stable, unlike a long ester that only needs dosing once or twice a week. Users commonly report 50 mg to 100 mg per day, often injected 30 to 60 minutes before training to use the rapid onset as a pre-workout effect. Cycles tend to run short, around 6 to 8 weeks, because daily injections of a suspension are demanding on the body. This is general guidance based on how the compound behaves, not medical advice.

Testosterone base aromatises fully, so oestrogen-related effects such as water retention and gynaecomastia are a real risk, and an aromatase inhibitor like anastrozole is commonly used alongside it. Expect typical androgenic effects too, including acne, oily skin, and hair loss in those predisposed, plus a possible rise in blood pressure. Injection site discomfort is more common than with esterified testosterone because of the daily frequency and the suspension carrier. Testosterone suppresses natural production, so hCG is often used on cycle and a proper PCT with nolvadex or clomid is required afterwards.

A long ester testosterone builds up gradually and holds steady blood levels for days on just one or two injections a week, which is why it's the standard choice for a first cycle. Testosterone base does the opposite: it hits fast and clears fast, needing daily injections to avoid levels crashing between doses. Because of that demanding schedule and the injection site strain it can cause, testosterone base is better suited to experienced users who already know how they respond to testosterone, not to someone running their first cycle.

Every Syncom Labs product sold through Steroids UK is lab tested for identity and purity, and each box carries its own verification check-code so you can confirm what you've received. Orders ship from the UK on Royal Mail Tracked 24 in plain, discreet packaging, with most reaching customers within 1 to 2 working days. Order before noon on a working day and it goes out same-day.