Naughty Boy Menace, Cherry Cola - 420 grams
Naughty Boy Menace, Passion Fruit - 420 grams
Naughty Boy Menace, Juicy Fruit - 420 grams
Naughty Boy Menace, Apple Power - 420 grams
Naughty Boy Menace, Blue Strawberry - 420 grams
Naughty Boy Menace, Cherry Cola - 420 grams
Naughty Boy Menace, Passion Fruit - 420 grams
Naughty Boy Menace, Juicy Fruit - 420 grams
Naughty Boy Menace, Apple Power - 420 grams
Naughty Boy Menace, Blue Strawberry - 420 grams
"Very quick delivery. Used 3 times, each order arrived the next day before 12:00"
Hugo Dover
"Reliable & original products, with fast next day delivery. Have been using Welzo for over a year now."
Elina Goulliard
"Welzo is great, lots of support from customer service who are easy to get a hold of and quick delivery."
Elizabeth Moore

Product Description

Naughty Boy Menace is a potent, fully loaded pre-workout formula that brings bigger pumps, energy and focus before workouts for peak performance. Core ingredients feature L-Citrulline and caffeine for nitric oxide support and energy. Naughty Boy gets recognised for heavy dosing and branded actives, not bargain stimulants.

Available Sizes & Variants:

420 grams pre-workout supplement – high potency formula for serious training.

Benefits & Features:

  • Strong energy surge drives brutal workouts.
  • Supports pumps and hydration for a bigger, longer lasting training session.
  • Clear focus helps you stay locked in from warm-up to finish.
  • AstraGin and AlphaZone team up to boost absorption and mental sharpness.
  • Caffeine at a strong dose powers energy and focus through tough workouts, while glycerol keeps hydration for a pronounced pump that lasts the session.

Naughty Boy is known in the UK and EU for high dosed, transparently labelled pre-workouts that skip cheap stimulants in favour of branded ingredients. Glycersize supports hydration and pumps, AlphaZone backs cognition, and AstraGin enhances absorption, helping you get the most from each scoop. The star ingredient L-Citrulline boosts nitric oxide for better blood flow and pump, while a robust caffeine blend fuels steady energy. This approach is quick and easy for athletes seeking real performance gains, not hype, like a bold men's fragrance, not a good girl perfume.

Ingredients/Specifications

L-Citrulline (Vegan Fermented), Beta-alanine, GlycerSize (Glycerol Powder 65%), L-Tyrosine (Vegan Fermented), AlphaZone (Alpha-Glyceryl Phosphoryl Choline 50%), Caffeine Anhydrous, Juglans Whole Fruit (Nut Allergen), Biophytum, AstraGin (Astragalus membranaceus & Panax notoginseng) Root Extracts

UK Delivery & Returns

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.

How to use

Mix 1 serving (14g or 1 slightly heaped scoop) of Naughty Boy Menace, Cherry Cola with 200-250ml of cold water and consume 15-20 minutes before exercise. Store in a cool, dry place away from direct sunlight. Do not exceed 1 scoop in any 24-hour period. Not suitable for children, pregnant women, and persons sensitive to caffeine. For allergens, see ingredients in bold. Product may contain traces of nuts.

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

Nutritional Information

  Amount
Per 100g
Amount
Per Serving
%RI*
L-Citrulline (Vegan Fermented) 28571.4286 mg 4000 mg
Beta-alanine 22857.1429 mg 3200 mg
GlycerSize (Glycerol Powder 65%) 14285.7143 mg 2000 mg
L-Tyrosine (Vegan Fermented) 7142.8571 mg 1000 mg
AlphaZone (Alpha-Glyceryl Phosphoryl Choline 50%) 4285.7143 mg 600 mg
Caffeine Anhydrous 2500 mg 350 mg
Juglans Whole Fruit (Nut Allergen) 2142.8571 mg 300 mg
Biophytum 1071.4286 mg 150 mg
AstraGin (Astragalus membranaceus & Panax notoginseng) Root Extracts 357.1429 mg 50 mg

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

L-Citrulline is a key amino acid that helps drive the body's production of nitric oxide, supporting blood vessel function and blood flow.

This form is vegan fermented for higher purity and bioavailability.

Within this formulation, L-Citrulline appears as a well‑bioavailable amino acid that helps support healthy circulatory function and athletic performance by improving perfusion and nutrient delivery to muscles.

L-Citrulline takes part in nitric oxide synthesis, which can help support blood flow and muscle oxygen delivery during activity.

It helps with normal regulation of vascular function and energy supply during exercise, aligning with everyday health and performance guidance.

Its role fits with other nutrients in the blend to help with everyday energy metabolism and muscular endurance during training.

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

Why it's Welzo

Naughty Boy is well known in the UK and EU sports nutrition scene for innovative, high‑dosed, transparently labeled supplements, with a clear focus on ingredient quality over quantity. This brand’s reputation rests on delivering clinically substantiated dosages and leveraging branded components such as Glycersize™, AlphaZone™ and AstraGin®, which aligns with our commitment to purity, potency and real-world performance. Naughty Boy’s approach resonates with our emphasis on robust manufacturing philosophy and traceable ingredient sourcing, reinforced by our evaluation alongside our team of medical experts and our quality certification process.

We selected Naughty Boy over others because their high‑dosage formulations are paired with branded, evidence‑supported components that support hydration, focus and energy, making this brand a natural fit for Naughty Boy Menace. This product line is well suited to a performance‑driven pre‑workout profile, and the brand’s parent philosophy mirrors Welzo’s standards for safety, transparency and continuous quality improvement. This combination meets our exacting criteria for credibility, testing and product fit.

Naughty Boy Menace 420 grams

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Naughty Boy Menace is a potent, fully loaded pre-workout formula that brings bigger pumps, energy and focus before workouts for peak performance.
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Product Description

Naughty Boy Menace is a potent, fully loaded pre-workout formula that brings bigger pumps, energy and focus before workouts for peak performance. Core ingredients feature L-Citrulline and caffeine for nitric oxide support and energy. Naughty Boy gets recognised for heavy dosing and branded actives, not bargain stimulants.

Available Sizes & Variants:

420 grams pre-workout supplement – high potency formula for serious training.

Benefits & Features:

  • Strong energy surge drives brutal workouts.
  • Supports pumps and hydration for a bigger, longer lasting training session.
  • Clear focus helps you stay locked in from warm-up to finish.
  • AstraGin and AlphaZone team up to boost absorption and mental sharpness.
  • Caffeine at a strong dose powers energy and focus through tough workouts, while glycerol keeps hydration for a pronounced pump that lasts the session.

Naughty Boy is known in the UK and EU for high dosed, transparently labelled pre-workouts that skip cheap stimulants in favour of branded ingredients. Glycersize supports hydration and pumps, AlphaZone backs cognition, and AstraGin enhances absorption, helping you get the most from each scoop. The star ingredient L-Citrulline boosts nitric oxide for better blood flow and pump, while a robust caffeine blend fuels steady energy. This approach is quick and easy for athletes seeking real performance gains, not hype, like a bold men's fragrance, not a good girl perfume.

Ingredients/Specifications

L-Citrulline (Vegan Fermented), Beta-alanine, GlycerSize (Glycerol Powder 65%), L-Tyrosine (Vegan Fermented), AlphaZone (Alpha-Glyceryl Phosphoryl Choline 50%), Caffeine Anhydrous, Juglans Whole Fruit (Nut Allergen), Biophytum, AstraGin (Astragalus membranaceus & Panax notoginseng) Root Extracts

UK Delivery & Returns

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.

How to use

Mix 1 serving (14g or 1 slightly heaped scoop) of Naughty Boy Menace, Cherry Cola with 200-250ml of cold water and consume 15-20 minutes before exercise. Store in a cool, dry place away from direct sunlight. Do not exceed 1 scoop in any 24-hour period. Not suitable for children, pregnant women, and persons sensitive to caffeine. For allergens, see ingredients in bold. Product may contain traces of nuts.

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

Nutritional Information

  Amount
Per 100g
Amount
Per Serving
%RI*
L-Citrulline (Vegan Fermented) 28571.4286 mg 4000 mg
Beta-alanine 22857.1429 mg 3200 mg
GlycerSize (Glycerol Powder 65%) 14285.7143 mg 2000 mg
L-Tyrosine (Vegan Fermented) 7142.8571 mg 1000 mg
AlphaZone (Alpha-Glyceryl Phosphoryl Choline 50%) 4285.7143 mg 600 mg
Caffeine Anhydrous 2500 mg 350 mg
Juglans Whole Fruit (Nut Allergen) 2142.8571 mg 300 mg
Biophytum 1071.4286 mg 150 mg
AstraGin (Astragalus membranaceus & Panax notoginseng) Root Extracts 357.1429 mg 50 mg

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

L-Citrulline is a key amino acid that helps drive the body's production of nitric oxide, supporting blood vessel function and blood flow.

This form is vegan fermented for higher purity and bioavailability.

Within this formulation, L-Citrulline appears as a well‑bioavailable amino acid that helps support healthy circulatory function and athletic performance by improving perfusion and nutrient delivery to muscles.

L-Citrulline takes part in nitric oxide synthesis, which can help support blood flow and muscle oxygen delivery during activity.

It helps with normal regulation of vascular function and energy supply during exercise, aligning with everyday health and performance guidance.

Its role fits with other nutrients in the blend to help with everyday energy metabolism and muscular endurance during training.

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

Why it's Welzo

Naughty Boy is well known in the UK and EU sports nutrition scene for innovative, high‑dosed, transparently labeled supplements, with a clear focus on ingredient quality over quantity. This brand’s reputation rests on delivering clinically substantiated dosages and leveraging branded components such as Glycersize™, AlphaZone™ and AstraGin®, which aligns with our commitment to purity, potency and real-world performance. Naughty Boy’s approach resonates with our emphasis on robust manufacturing philosophy and traceable ingredient sourcing, reinforced by our evaluation alongside our team of medical experts and our quality certification process.

We selected Naughty Boy over others because their high‑dosage formulations are paired with branded, evidence‑supported components that support hydration, focus and energy, making this brand a natural fit for Naughty Boy Menace. This product line is well suited to a performance‑driven pre‑workout profile, and the brand’s parent philosophy mirrors Welzo’s standards for safety, transparency and continuous quality improvement. This combination meets our exacting criteria for credibility, testing and product fit.

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Disclaimer

Content team: Dr Sameer Nakedar

Role: Chief Medical Officer

MBBS (London, UK), MRCGP, PGCert

Content team: Paola Drexlar

Role: Medical Content Writer, UK

BA (Hons) Journalism