Project Stim is a pre workout supplement built to deliver rapid and sustained energy that boosts alertness and performance. Fueled by caffeine from caffeine anhydrous and Infinergy Di Caffeine Malate, this aims for a fast, smooth energy curve. Our brand has grown on strict quality standards and a heritage of performance nutrition.

Available Sizes & Variants:

60 capsules - vegetarian capsule format

Benefits & Features:

• Rapid caffeine delivery powers quick focus.
• Di Caffeine Malate blends immediate caffeine with a sustained release, helping energy last longer and reducing the crash sometimes felt with caffeine alone, during intense workouts and training blocks.
• Two caffeine forms deliver a dual action that energises mind and muscles for tough sessions.
• Vegetarian capsules make this convenient for daily pre workout use.
• Caffeine improves endurance, strength and reaction time during workouts in human trials.

Project Stim sits within a brand with a long heritage in performance nutrition, built on science led formulations and rigorous quality control. The product is produced to high standards in a facility that tests every batch for purity. The star ingredient blend combines fast acting caffeine with a smooth energy profile to support focus and drive during training. Our range also includes magnesium glycinate, creatine, and probiotics, showing our commitment to holistic athletic support.

Caffeine Anhydrous, Infinergy Di-Caffeine Malate, Caffeine Anhydrous, Infinergy Di-Caffeine Malate

• GTIN: 5060347312742
• Manufacturer: Efectiv Nutrition
• Categories: Efectiv Nutrition
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take 1 capsule 15-30 minutes before exercise. Do not use alongside other stimulant-based foods or supplements. Do not use within 3 hours of intended sleep. Store in a cool, dry place away from direct sunlight. Keep out of reach of children. Not suitable for individuals under 18 years of age. Consult a healthcare professional before use if you are pregnant, nursing, or have any medical conditions.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: Caffeine

Caffeine is a brain-boosting spark that wakes you up and sharpens focus. This product brings caffeine in two forms, anhydrous caffeine and di-caffeine malate, giving you quick and steady energy effects.

This mix helps deliver fast energy from the anhydrous part and longer release from the malate part, keeping energy steady during activity.

What Does Caffeine Do?

Caffeine helps you stay alert and perform better by boosting mental wakefulness and reaction time. It also takes part in energy metabolism that can help your exercise performance in line with what’s advised.

Dr. Grgic from the University of Zagreb found that caffeine lifts physical performance in both short-term and endurance workouts.

This supplement isn’t meant to diagnose, treat, cure, or prevent any disease.

Welzo picked Efectiv Nutrition for Project Stim because this brand has built its reputation around potent stimulant formulas that blend quick and long-lasting energy delivery. The product leverages caffeine from two sources, providing a total of 200mg per capsule, which fits with our focus on reliable pre‑workout energy that supports alertness and focus. This dual‑source approach is the kind of thoughtfully engineered formulation we look for in a partner brand, helping athletes and exercisers push through workouts with confidence. Our team evaluated how the blend integrates with our ingredient quality and purity standards, and this brand consistently reflects a discipline around formulation integrity that resonates with our UK market needs. This brand was evaluated by Welzo's healthcare professionals for compliance with our ingredient quality and purity standards. We see Efectiv Nutrition as a trusted partner that shares our commitment to safety, consistency and performance.