Intex Pharma T400 Review — Dosage Guide, Bloodwork Results and Full Cycle Breakdown

Published: June 2026  ·  Category: Product Reviews  ·  8 min read

Intex Pharma T400 is one of the most popular testosterone blends in the UK, and for good reason. Whether you are looking for a potent base compound for a bulk, a steady testosterone foundation for a cutting stack, or a well-tolerated option for higher-dose protocols, Intex T400 consistently delivers when purchased from the official source. This review covers what T400 contains, how to dose it correctly, what bloodwork to run, and what genuine results look like across a full cycle.

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What is Intex Pharma T400?

Intex Pharma T400 is a multi-ester testosterone blend dosed at 400mg per ml. Rather than using a single testosterone ester, T400 combines three esters with different release rates, designed to deliver a more stable blood testosterone concentration than a single-ester product at an equivalent dose.

The composition of Intex T400 is as follows.

• Testosterone Enanthate — 120mg per ml. A long-acting ester with a half-life of approximately seven to nine days. Well-established and widely used as the backbone of both TRT and performance cycles.
• Testosterone Cypionate — 120mg per ml. Pharmacologically near-identical to Enanthate, with a half-life of approximately eight days. The primary difference is the carrier oil, which tends to make Cypionate slightly more comfortable to inject.
• Testosterone Decanoate — 160mg per ml. The longest-acting ester in the blend, with a significantly extended half-life that contributes to the flatter, more sustained testosterone curve that T400 is known for.

The logic behind multi-ester blends is that the shorter esters provide an earlier elevation in serum testosterone, while the longer-acting Decanoate maintains levels between injections. Research published by the National Institutes of Health on testosterone ester pharmacokinetics confirms that combining esters with varying half-lives produces a broader, flatter blood concentration curve compared to single-ester administration at the same total weekly dose.

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Intex Pharma T400 dosage — how much to run and how often

Because Intex T400 is dosed at 400mg per ml, even a modest injection volume delivers a significant amount of active testosterone. This is one of the main practical advantages over standard 250mg or 300mg testosterone products for anyone running higher-dose protocols.

Beginner protocol — 400mg to 500mg per week

For a first cycle, 1ml to 1.25ml of Intex T400 per week provides 400 to 500mg of testosterone. This is sufficient to produce meaningful strength and size gains while keeping the dose conservative enough to assess individual response. Splitting into two injections per week, such as Monday and Thursday, produces more stable blood levels than a single weekly pin.

Intermediate protocol — 600mg to 800mg per week

More experienced users typically run 1.5ml to 2ml per week, delivering 600 to 800mg of total testosterone. At this dose level, aromatase inhibitor management becomes more important as higher testosterone doses produce more oestradiol conversion. Running a compound such as Anastrozole or Aromasin alongside T400 helps manage this effectively. Drugs.com notes that clinical testosterone dosing ranges from 50 to 400mg every two to four weeks, though performance protocols typically sit well above this.

Injection frequency

Twice-weekly injections are the recommended protocol for Intex T400. Given the combined half-lives of the three esters, once-weekly injection is possible, but twice-weekly produces meaningfully more stable blood levels and reduces peak-to-trough variation. NIH guidance on androgen replacement confirms that weekly injections are optimal for minimising supranormal peak levels with long-acting esters.

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Intex Pharma T400 cycle — what to expect week by week

A standard cycle using Intex T400 runs between 12 and 16 weeks. Because of the Decanoate ester's longer half-life, it takes slightly longer to fully clear the system at cycle end than a straight Enanthate or Cypionate product. Account for this when planning PCT timing.

Weeks one to four

The Enanthate and Cypionate esters begin elevating serum testosterone within the first week, with peak levels typically reached within five to seven days of the first injection. During weeks one to four, users generally report improved recovery, increased training capacity, and a gradual increase in strength. Muscle fullness increases as glycogen storage improves and nitrogen retention rises. Libido typically increases noticeably by week two to three.

Weeks five to ten

This is where the primary gains accumulate. Strength increases become substantial, body weight rises, and muscle fullness is pronounced. Oestradiol management is particularly important during this phase. If aromatase inhibitor dosing is not calibrated correctly, water retention and mood instability can become significant. The right AI dose varies considerably between individuals, which is precisely why mid-cycle bloodwork is essential rather than optional.

Weeks eleven to sixteen

The final weeks of an Intex T400 cycle are typically where body composition improvements become most visible, particularly if calorie intake has been managed well. Strength is at its peak at this stage. Furthermore, this is the time to plan the transition to PCT, ensuring the correct clearance window for the Decanoate ester before beginning recovery.

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Bloodwork on Intex Pharma T400 — what to run and what to expect

Running bloodwork is non-negotiable on any testosterone cycle, and Intex Pharma T400 is no exception. Bloodwork serves two purposes. First, it confirms that the product is legitimate and correctly dosed. Second, it allows you to manage oestradiol, haematocrit and other markers that shift significantly when running supraphysiological testosterone.

Pre-cycle baseline panel

Before starting, measure your baseline testosterone, free testosterone, oestradiol (E2), LH, FSH, haematocrit, full blood count and liver function. The NHS provides reference ranges for testosterone which are useful as a comparison point. Private blood testing services in the UK allow full panels without a GP referral, with results typically available within 48 hours.

Mid-cycle panel at week six to eight

A mid-cycle panel on Intex T400 should show total testosterone significantly elevated above baseline. At 600mg per week, mid-cycle total testosterone readings in the range of 40 to 80 nmol/L are common, though individual response varies considerably. Take the sample at trough, meaning just before your next injection, for the most meaningful reading. If your result is significantly lower than expected for your dose, contact us on WhatsApp with your batch number and we will verify the product straight away.

Oestradiol management

Higher testosterone doses convert to oestradiol via the aromatase enzyme. Oestradiol above 200 pmol/L typically produces water retention and mood instability in many users. Below 100 pmol/L, joint discomfort and low libido often appear. Most users find a comfortable range between 100 and 180 pmol/L. AI dosing should always be adjusted based on measured oestradiol levels, never estimated.

Haematocrit monitoring

Testosterone significantly increases red blood cell production, which raises haematocrit. Values above 52 per cent carry cardiovascular risk and should be addressed either by reducing dose, increasing hydration, or donating blood. Haematocrit should appear on every blood panel run during a cycle.

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Intex T400 for bulking versus cutting

Bulking with Intex T400

In a calorie surplus, T400 drives substantial muscle protein synthesis and dramatically improves recovery capacity. Combined with a compound such as Deca or Anadrol from the official Intex Pharma store, the mass-building effect is significant. Oestradiol management is more important during a bulk, as the additional calorie intake can increase aromatase activity.

Cutting with Intex T400

Used in a calorie deficit, T400 at 400 to 600mg per week provides sufficient anabolic stimulus to preserve muscle mass while body fat decreases. Many users add Masteron to a T400 cutting stack. A typical cutting combination pairs T400 with Intex Mast E-200 for 12 to 16 weeks, which also provides anti-oestrogenic benefits alongside the hardening effect.

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Side effects and how to manage them on Intex T400

Every testosterone compound carries the same potential side effects, and Intex T400 is no exception. Severity is primarily dose-dependent and individually variable.

• Water retention. Driven by oestradiol. Managed with appropriate AI dosing based on bloodwork readings.
• Acne. More common in individuals with a genetic predisposition. Topical treatments and good skin hygiene help considerably.
• Hair thinning. In individuals genetically susceptible to male pattern baldness, high-dose testosterone can accelerate the process via DHT conversion.
• Testicular atrophy. Suppression of the HPG axis occurs on any testosterone cycle. HCG during the cycle helps maintain testicular volume and function. The NIH notes that testosterone supplementation reduces sperm counts, and in approximately 10 per cent of cases full recovery does not occur even after cessation.
• Cardiovascular changes. Haematocrit elevation and changes in lipid profile both require monitoring through regular bloodwork throughout the cycle.

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Post cycle therapy after Intex T400

Because of the Decanoate ester in Intex T400, PCT should not begin until at least three weeks after the last injection. This allows the long-acting ester to clear the system sufficiently before introducing a selective oestrogen receptor modulator.

A standard PCT protocol following a T400 cycle uses Clomid at 50mg per day for two weeks, dropping to 25mg for a further two weeks. Some users add Nolvadex alongside Clomid during the first two weeks. HCG is best used during the final two weeks of the cycle itself rather than after it, as this more effectively preserves HPG axis responsiveness. All PCT compounds are available from the official Intex Pharma UK store.

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Is Intex Pharma T400 worth buying?

Based on consistent bloodwork results from verified users, Intex Pharma T400 delivers what the label claims when purchased from the official store at intexpharmaresearch.uk. The three-ester blend provides a more stable testosterone release profile than a single long-acting ester, the 400mg per ml concentration makes higher-dose protocols practical without injecting large oil volumes, and every batch is independently verified by Janoshik Analytical with the Certificate of Analysis available in the product gallery before you buy.

Where negative reports about T400 exist in the community, they consistently trace back to products sourced through resellers or copycat websites rather than through the official store. Buying directly, verifying the batch through the Janoshik COA in the product gallery, and running mid-cycle bloodwork to confirm your levels removes any doubt about quality.

If you have questions about dosing, cycle structure or stacking options before ordering, contact us on WhatsApp at +44 7882 742370 and we will help you put together the right protocol for your goals.

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