Efectiv Nutrition ProGBB nudges energy metabolism forward by acting as a direct precursor to L-carnitine, supports efficient fat burning during workouts, and its stimulant free formula makes stacking easy.

Available Sizes & Variants:

60 capsules – a standard daily serving for steady energy support.

Benefits & Features:

• Stimulant free energy keeps workouts smoother
• Key active ingredient ProGBB boosts the body's natural ability to produce L-carnitine, which helps shuttle fats into mitochondria for energy during training, supporting effort and improved performance
• Designed for daily use, it avoids jitters and fits easily into any training plan
• Simple capsule format pairs with other supplements to fit your stacking routine
• Produced under quality controls to ensure consistent potency and safety

ProGBB sits at the heart of this formula, a direct precursor to L-carnitine that helps the body convert fat into energy for workouts. Each capsule contains 50 mg of ProGBB and uses a vegan friendly shell with rice flour as a clean base. The result is a stimulant-free option that fits neatly into stacking routines. With a focus on delivering consistent quality, the brand highlights simple ingredients and careful manufacturing so you can train with confidence. Works well alongside probiotics, a vitamin d supplement and berberine as part of a balanced wellness routine.

ProGBB (Gamma-Butyrobetaine Ethyl Ester Chloride) 50mg, Rice Flour, Magnesium Stearate, HPMC (Hydroxypropyl Methylcellulose) Capsule Shell.

• GTIN: 5060347312933
• Manufacturer: Efectiv Nutrition
• Categories: CHECKOUT UPSELLEfectiv 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 daily, preferably 30-45 minutes before exercise. Store in a cool, dry place away from direct sunlight. WARNING: ProGBB may make you SWEAT like crazy. Do not exceed recommended usage.

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

The key ingredient is: Gamma-Butyrobetaine Ethyl Ester Chloride

Gamma-Butyrobetaine Ethyl Ester Chloride acts as a direct precursor to L-carnitine, helping your body to manufacture L-carnitine naturally. This compound backs the metabolic processes behind energy production during workouts.

This formulation centres on the active precursor while including harmless excipients for capsule form, which help with its delivery and stability.

What exactly does Gamma-Butyrobetaine Ethyl Ester Chloride do?

It helps shuttle fatty acids into mitochondria for energy use, contributing to energy production during activity. Its precursor role helps the body utilise fats for fuel in normal metabolism.

As a stimulant-free ingredient, you can stack it with other supplements to support athletic performance in line with standard energy metabolism pathways.

*This product isn't intended to diagnose, treat, cure, or prevent any disease.

Efectiv Nutrition is the brand we picked for ProGBB because its formulation centres on a stimulant-free approach to supporting energy metabolism through a direct precursor to L-carnitine. This fits our customers who look for clean, stackable options that pair with other supplements without extra stimulants. The product’s core ingredient, ProGBB, serves as a direct precursor to L-carnitine, aiding the body optimise fat metabolism and energy production as part of workout support.

Our medical experts reviewed the brand with a focus on safety, transparency and consistency, and the team’s assessment is supported by our rigorous testing protocols to ensure quality and purity across ingredients. You can see how we evaluate formulations and certifications through our rigorous testing protocols and how our team of medical experts collaborates on product suitability via our team of medical experts.

In choosing Efectiv Nutrition for ProGBB, we recognised the brand’s commitment to a clean, effective delivery of a GBB-based pathway, and the solution fits well within Welzo’s emphasis on validated quality, safety and consumer trust.