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ATS Labs Test PSI

ATS Labs 120 Capsules

Original price was: £46.80.Current price is: £40.56.Save 13%Tax includedLowest price in 30 days: £40.56

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Test PSI by ATS Labs is a powerful natural testosterone booster formulated for individuals seeking to maximise strength, lean mass, stamina, and hormonal optimisation. Backed by a no-nonsense matrix of potent test-enhancing compounds, Test PSI aims to elevate your testosterone levels, support recovery, and intensify your performance both in and out of the gym.

This is not just a basic blend — it's designed with aggressive training, plateaus, and real results in mind. Whether you're chasing muscle growth, enhanced libido, or next-level endurance, Test PSI brings the hormonal foundation to help you go further.

Our Observations and User Feedback


Test PSI stands out in a crowded field of testosterone boosters because it doesn't rely on generic ingredients or underdosed blends. Based on user feedback and our own experience, the formula yields noticeable improvements in strength, drive, and recovery, especially when taken consistently for 3–4 weeks.

The combination of D-Aspartic Acid and Fadogia provides a substantial foundational boost, while Mucuna supports mood and motivation. Several users also report improved sleep quality and higher training volumes with less fatigue, which suggests better recovery and hormonal balance.

This is a serious testosterone support tool for those chasing results — whether it's more muscle, more focus, or more stamina.

Who Is It For?


Test PSI is ideal for:

  • Lifters and athletes looking to boost testosterone naturally

  • Individuals experiencing plateaus in lean mass or strength

  • Those on PCT cycles or recovering from suppression

  • Anyone aiming to improve libido, endurance, and recovery

Ingredient Breakdown – Per Serving (3 Capsules)


Testosterone Support Matrix – 2280mg


D-Aspartic Acid
One of the most studied natural ingredients for stimulating luteinizing hormone (LH) and boosting free and total testosterone. Effective for short cycles or during PCT (post-cycle therapy).
Fadogia Agrestis Extract
A powerful West African herb known for stimulating testicular function and increasing libido, often paired with DAA for synergistic results in boosting testosterone and enhancing physical performance.
Mucuna Pruriens (Velvet Bean Extract)
Rich in L-DOPA, a dopamine precursor that promotes mood, testosterone production, and fertility. Also supports better sleep and hormonal recovery.
4’-Methoxy-5,7-Dihydroxyflavone
Also known as Methoxyflavone — a natural flavonoid with anabolic support potential. May enhance protein synthesis and muscle retention while reducing cortisol levels.

Dosage – Timing – Follow-Up


Recommended Use: Take three capsules daily with a meal.
Best Timing: Morning or pre-workout is ideal to support natural testosterone rhythm.
Cycle 6–8 weeks on, followed by a 2–4 week break.
Can be stacked with non-hormonal fat burners or muscle-building supplements.

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Test PSI is a natural testosterone booster in 120 capsules, built around a 2280 mg Testosterone Support Matrix. It targets strength, lean mass, stamina and hormonal optimisation rather than being a light everyday formula.

The 2280 mg matrix contains D-Aspartic Acid, Fadogia Agrestis extract, Mucuna Pruriens velvet bean extract and 4′-Methoxy-5,7-Dihydroxyflavone, also known as methoxyflavone.

D-Aspartic Acid is one of the most studied natural ingredients for stimulating luteinising hormone and raising free and total testosterone. It is effective in short cycles and during post cycle therapy.

Fadogia Agrestis is a West African herb known for stimulating testicular function and increasing libido. It is often paired with D-Aspartic Acid because the two work on complementary parts of the same pathway.

Mucuna is rich in L-DOPA, a dopamine precursor that supports mood, testosterone production and fertility. It also supports better sleep and hormonal recovery.

4′-Methoxy-5,7-Dihydroxyflavone is a natural flavonoid with anabolic support potential. It may enhance protein synthesis and muscle retention while reducing cortisol levels.

Based on user feedback, noticeable improvements in strength, drive and recovery tend to show up when it is taken consistently for three to four weeks.

Take three capsules daily with a meal, ideally in the morning or pre workout to fit your natural testosterone rhythm.

Yes. Run six to eight weeks on, followed by a two to four week break.

Yes. It can be stacked with non hormonal fat burners or muscle building supplements.

ATS Labs

ATS Labs

ATS Labs is built for lifters who have already done the basics and need something more targeted. If you are eating well, training hard, and still hitting the same ceiling, the problem is usually specificity: your supplements are not matched closely enough to the demands of your training.