Optimum Nutrition Amino Energy Pre Workout Powder

Optimum Nutrition Amino Energy Pre Workout Powder

Engineered with purpose. Worn with confidence

Regular price £20.98 GBP
Regular price £20.98 GBP Sale price £20.98 GBP
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    GymBum UK Size Guide

    GYMBUM UK®

    Size Guide


    1️⃣ Women – Sports Bras

    Measure Yourself

    For accurate sizing, keep the tape measure level and parallel to the ground.

    Bust
    Measure around the fullest part of your chest.

    Underbust
    Measure directly under your bust where the bra band sits.


    Body Measurements (Inches)

    Size Bust Underbust
    XS 33–34" 27–28"
    S 34–36" 28–30"
    M 36–38" 30–32"
    L 38–40" 32–34"
    XL 40–43" 34–36"
    2XL 43–46" 36–39"
    3XL 46–49" 39–42"

    Between sizes?
    Size up for a more comfortable fit.
    Size down for a more compressive performance fit.


    2️⃣ Women – Tops & T-Shirts

    Body Measurements (Inches)

    UK Size Bust Waist
    4–6 31–33" 24–26"
    8–10 33–36" 26–28"
    12–14 36–40" 28–32"
    16 40–43" 32–34"
    18 43–46" 34–37"

    3️⃣ Women – Leggings & Shorts

    Body Measurements (Inches)

    UK Size Waist Hips
    4–6 24–26" 34–36"
    8–10 26–28" 36–38"
    12–14 28–32" 38–42"
    16 32–34" 42–44"
    18 34–37" 44–46"

    4️⃣ Men – Tops & Hoodies

    Size Chest Waist
    S 36–38" 30"
    M 38–40" 32–34"
    L 42–44" 36"
    XL 46–48" 38"
    XXL 50–52" 40–42"

    5️⃣ Men – Shorts & Joggers

    Size Waist
    S 30"
    M 32–34"
    L 36"
    XL 38"
    XXL 40–42"

    Fit & Sizing Notes

    • Some styles follow Asian sizing and may run 1–2 sizes smaller than standard UK sizing.

    • Refer to each product description for specific fit details.

    • Measurements may vary slightly depending on fabric and cut.

    Product Description

    Discover Optimum Nutrition Essential Amin.O. Energy, a ready-to-mix amino acid food supplement powder, designed to boost your energy and focus* before your workout or throughout the day. ON amino acids supplements are scientifically proven to support your energy needs and long-term training. This pre-workout powder is packed with 5 g of micronised amino acids per serving (such as L-Glutamine, L-Leucine, and L-Arginine and BCAAs among others) and supports your daily amino acid intake. Each great-tasting sports drink gives you the edge. It contains green tea and green coffee extracts, plus it provides you with 100 mg of caffeine from natural sources and, thus, contributes to increased alertness and improved concentration.* ON sports drinks are also a source of Vitamin C, which contributes to normal energy-yielding metabolism and supports your immune system.* Plus, its low-calorie count and zero sugar make it a viable alternative to beverages such as cola and coffee. The amino energy food supplement is designed for everyone: from those just starting on their path to leading a healthier lifestyle to athletes, hard-working students, professionals and fitness lovers. Optimum Nutrition Essential AminO Energy is a tasty pick-me-up that doesn’t break the bank and can be enjoyed at any time and anywhere; at home, on the go, or at the gym. Choose between six great tasting options: Fruit Fusion, Lemon Lime, Orange Cooler, Pineapple, Strawberry Lime, or Watermelon. Simply add 2 level scoops (9 g) to 330 ml of cold water, mix, and serve.

    Ingredients

    Amino Acid Blend (L Glutamine, L Leucine, Taurine, L Arginine, L Isoleucine, L Valine, Beta Alanine, L Tyrosine, L Histidine, L Lysine Hydrochloride), Emulsifier (Sunflower Lecithin), Acids (Citric Acid, Malic Acid, L Tartaric Acid), Flavouring, Colours (Beetroot Red, Curcumin, Beta Carotene), Inulin, Sweeteners (Sucralose, Acesulfame K), Thickeners (Cellulose Gum, Xanthan Gum, Carrageenan), Anti Caking Agents (Silicon Dioxide, Calcium Silicate), Green Tea Extract (Camellia sinensis leaf), Natural Caffeine, L Ascorbic Acid, Green Coffee Extract (Coffea arabica L fruit)

    Directions

    Add 2 level scoops (9 g) to 330 ml (11 oz) of cold water and mix. Recommended consumption of 1 serving per day, either before, during or after your workout

    Safety Warning

    NOTE: To be used in the framework of a varied and balanced diet and a healthy lifestyle. Food supplements are not to be used as a substitute for a varied diet. Do not exceed recommended daily dose. Keep out of reach of children.High caffeine content (100 mg / serving). Not recommended for children or pregnant or breastfeeding women.

    Box Contains

    1 x 270g Amino Energy

    Manufacturer Contact Information

    4 Waterside, Dublin 24, Ireland

    • A caffeine-infused ANYTIME-ENERGY drink*, a ready-to-mix powder alternative to carbonated beverages, flavoured waters, coffee and teas
    • With 5 g of amino acids per serving, including BCAA, L-Glutamine and L-Leucine, plus 100 g of natural caffeine and vitamin C to help BOOST YOUR ENERGY AND FOCUS*
    • Pre-workout powder designed for fitness lovers and professional athletes to support your exercise and workout regime
    • ON low-calorie food supplement with zero sugar designed for those leading an active lifestyle to improve diet and overall nutrition
    • Sports drink in 6 great tasting varieties, so you don’t have to sacrifice excellent flavour to get the boost you crave
    • *Vitamin C contributes to normal energy-yielding metabolism. Caffeine contributes to increased alertness and improved concentration. Source: COMMISSION REGULATION (EU) No 432/2012 of 16 May 2012; EFSA Journal 2011;9(4):2054 24

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    FREE UK Shipping on Orders £50+

    Order Before 3PM — Same-Day Dispatch

    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

    Order Before 3PM — Same-Day Dispatch

    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

    Order Before 3PM — Same-Day Dispatch

    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

    Order Before 3PM — Same-Day Dispatch

    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

    Order Before 3PM — Same-Day Dispatch

    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

    Order Before 3PM — Same-Day Dispatch

    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

    Order Before 3PM — Same-Day Dispatch

    Official GymBum UK® — Registered Brand

    FREE UK Shipping on Orders £50+

    Order Before 3PM — Same-Day Dispatch

    Official GymBum UK® — Registered Brand

    Meet Jess — Your Daily Motivation

    Real Training. Real Results.

    Jess represents everything GymBum stands for — hard work, positivity, and consistency. Whether she’s training outdoors or smashing a session in the gym, she puts our activewear through the real test: everyday movement. If she loves it, you will too.

    Meet Chloe — Strength with a Smile

    Your Inspiration for Everyday Training

    Chloe brings energy, positivity, and real dedication to every workout. Whether she’s lifting in the gym or running Scotland’s trails, she pushes our GymBum activewear to its limits. Her natural, confident style perfectly reflects what GymBum stands for — feel good, move strong, and become the best version of yourself.

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