Naughty Boy Winter Soldier Illmatic EAA fuels workouts with a plant-based essential amino acids blend to help muscle recovery and growth. Leucine leads the pack, driving muscle protein synthesis, while Velositol, AstraGin and Senactiv boost absorption and energy turnover. Naughty Boy is a premium UK brand known for innovative formulations and strict quality standards.

Benefits & Features:

• Supports rapid muscle recovery in eaa supplements, with a complete 10g essential amino acid profile per serving.
• Leucine powers muscle synthesis and lean gains, the key driver of growth.
• Velositol, AstraGin and Senactiv boost absorption and energy turnover, making this product a standout among sports nutrition supplements.
• Vegan fermented amino acids provide plant based sourcing without sacrificing purity.
• Electrolytes support hydration and performance during long sessions.

Born from Naughty Boy's UK based lab, you know, the Winter Soldier Illmatic blend draws on plant based amino acids and patented enhancers. Velositol, AstraGin and Senactiv are the star ingredients, chosen to support absorption, energy turnover and faster recovery. Vegans can feel confident the amino acids are fermented for plant origin. It's the sort of premium, science backed blend that helps athletes train consistently and bounce back quickly after tough sessions, pairing well with muscle gainer protein powder.

L-Leucine (Vegan Fermented), L-Isoleucine (Vegan Fermented), L-Valine (Vegan Fermented), L-Lysine (Vegan Fermented), L-Threonine (Vegan Fermented), L-Phenylalanine (Vegan Fermented), L-Histidine (Vegan Fermented), L-Methionine (Vegan Fermented), L-Tryptophan (Vegan Fermented)

• GTIN: 742978743052
• Manufacturer: Naughty Boy
• Size: Mango & Passion Fruit
• Categories: Naughty BoySports Supplements
• 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.

Mix 1 serving (14g or 1 level scoop) with 400ml of ice-cold water. Illmatic EAA can be consumed before training, during training, or post-training. Store in a cool, dry place, away from direct sunlight. Keep out of reach of children. Not suitable for children, pregnant or breastfeeding women. Contains natural caffeine (100mg).

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: Leucine

Leucine is an essential amino acid that plays a key role in supporting muscle protein synthesis and recovery after exercise. This product uses vegan fermented leucine to provide a high-quality amino acid building block for muscles.

This formula also includes other essential amino acids and absorption-enhancing ingredients to support overall amino acid availability and utilisation in the body.

What Does Leucine Do?

Leucine participates in stimulating muscle protein synthesis and may contribute to maintenance of muscle mass during training. This effect is complemented by additional amino acids and absorption aids that can support nutrient uptake and energy turnover during workout periods.

In line with EFSA and NHS guidance on normal physiological functions, these nutrients contribute to everyday vitality and performance without implying disease treatment or prevention.

This supplement is not intended to diagnose, treat, cure, or prevent any disease.

Naughty Boy is Welzo’s chosen partner for this brand because of a proven commitment to innovative, performance-focused supplements with transparent, full-label formulas. The brand is well recognised in the UK and European market for delivering premium sports nutrition products and for consistently using clinically researched branded ingredients such as Velositol®, AstraGin® and Senactiv®, which align with our emphasis on reliability and evidence-based formulation. This brand’s manufacturing approach and reputation for serious performance products set it apart in a crowded market, and its UK-based production supports our quality expectations. When assessing partners, our medical team our medical team looked for a brand with clear dedication to safety, efficacy and traceability, which Naughty Boy demonstrates through its product design and ingredient choices. This combination meets our standards for quality and reliability as described in our ingredient quality and purity standards.