£75.52

Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Salted Caramel, 4.35kg)

Salted Caramel, REF131

Price data last checked 86 day(s) ago - refreshing...

View at Amazon

Price History & Forecast

Last 5 days • 5 data points (No recent data available)

Historical
Generating forecast...
£82.94 £74.78 £76.56 £78.34 £80.12 £81.90 £83.68 24 January 2026 25 January 2026 26 January 2026 27 January 2026 28 January 2026

Price Distribution

Price distribution over 5 days • 2 price levels

Days at Price
Current Price
1 day · current 4 days 0 1 2 3 4 £76 £83 Days at Price

Price Analysis

Most common price: £83 (4 days, 80.0%)

Price range: £76 - £83

Price levels: 2 different prices over 5 days

Description

Product Description One Stop Xtreme is your one stop shop to extremely quality gains. Want all your protein supplements in one shake? Look no further. One Stop® Xtreme weight gain milkshake from Reflex Nutrition is the ultimate choice for serious athletes and bodybuilders seeking comprehensive nutritional support in a single high protein shake. This high calorie weight gain protein powder is not just a supplement; it's a powerhouse blend designed to fuel intense training sessions and facilitate muscle gains. Formulated to replace a multitude of individual supplements, this bulking protein powder offers an impressive profile of 55g of protein, 10.3g of BCAAs, a combination of 71g of high and low GI carbohydrates, and a substantial 5,000mg of premium Creapure® Creatine per 145g serving. This meticulously crafted blend supports muscle recovery and sustained energy, making it ideal for those looking to bulk up effectively and efficiently. In addition to its core macronutrients, One Stop® Xtreme mass protein powder is enriched with the Digezyme® digestive enzyme complex and LAB2PRO® friendly bacteria, ensuring optimal nutrient absorption. Essential amino acids like L-Leucine, Beta Alanine, Betaine Anhydrous, and Taurine enhance the formula, further aiding in muscle repair. The comprehensive vitamin and mineral matrix in One Stop® Xtreme plays a crucial role in maintaining normal protein synthesis, immune system function, and normal testosterone production - essential for peak physical performance. With its smooth texture and superior taste of the powder, One Stop® Xtreme is not only effective but also enjoyable to consume. Available in both 2.03kg tubs (protein powder 2kg with 14 servings) and larger 4.35kg tubs (with 30 servings), Reflex's high calorie weight gain protein powder is designed to fit the needs of serious users: whether you're preparing for a competition or looking to exceed your personal bests, One Stop® Xtreme is your go-to supplement for achieving formidable results. Ingredients Whey protein concentrate (30%) (MILK), maltodextrin, MILK protein (12%) of which (80% micellar casein, 20% native whey), OAT flour, BARLEY flour, glutamine peptides (WHEAT), creatine monohydrate Creapure, L-leucine, flavouring, betaine anhydrous, beta alanine, L-taurine, magnesium bisglycinate, sea salt, cocoa powder, potassium chloride, thickener (cellulose gum), L-choline bitartrate, sweeteners (sucralose, steviol glycosides), colour (carotenes), digestive enzyme complex DigeZyme (alpha-amylase, neutral protease, cellulase, lactase, lipase), vitamin C (L-ascorbic acid), zinc bisglycinate, tocotrienol-rich annatto seed extract DeltaGold, ferrous bisglycinate, vitamin B3 (nicotinamide), copper bisglycinate, selenomethionine, piperine BioPerine, protected lactic acid bacteria (Bifidobacterium bifidum, Lactobacillus acidophilus, Lactobacillus rhamnosus), vitamin A (retinyl acetate), vitamin B5 (calcium D-pantothenate), vitamin D3 (cholecalciferol), vitamin B6 (pyridoxine hydrochloride), vitamin B1 (thiamine hydrochloride), vitamin B2 (riboflavin), chromium picolinate, vitamin B9 (folic acid), vitamin B7 (D-biotin), vitamin B12 (methylcobalamin) Directions Mix 145 g (approximately one level 250ml measure) with 600 ml water until powder has fully dissolved. Take a shake mid-morning between meals, and a second shake after your workout if required. Safety Warning This product is a food supplement and should be used in conjunction with food as part of a healthy and varied diet, not as a substitute for such. Recommended daily consumption is one to two 145 g servings per day. Do not exceed the stated recommended daily dose. This product is not intended for use by persons under the age of 18. Keep out of reach of young children. The scoop included with this product measures by volume not by weight, for precise measurements please use measuring scales. This product is sold by weight, not by number of servings. Protein contributes to the growth and maintenance of muscle mass. Creatine increases physical performance in successive bursts of short-term, high intensity exercise. The beneficial effect is obtained with a daily intake of 3 g of creatine. Manufacturer Contact Information Reflex Nutrition, Sea View Way, Brighton, BN2 6NT, UK

Key Features

All-in-One Weight Gainer To Simplify Your Supplement Routine: One Stop Xtreme has been formulated to replace the use of numerous supplements, allowing you to take only one protein shake to support muscle growth alongside a balanced healthy diet

High-performing Weight Gain Shake: One Stop Extreme high protein powder delivers a hit of protein, creatine, BCAAs and other beneficial nutrients to bodybuilders looking to make gains - contributing to the growth and maintenance of muscle mass

Boosting Stregth and Endurance: Reflex mass gainer protein powder contains creatine, that increases physical performance in successive bursts of short-term, high intensity exercise - With LAB2PRO friendly bacteria and Digezyme digestive enzymes

Nutritional Excellence: contains L-Leucine, Beta Alanine, Betaine Anhydrous and Taurine, along with essential vitamins and minerals aiding the maintenance of normal protein synthesis, function of the immune system and testosterone production

Premium Ingredients: Reflex only uses whey protein sourced from grass-fed cows, ensuring a high-quality weight gain protein powder that mixes well, with a smooth texture and a delicious taste

Produced in an Informed Sport Registered Facility: Suitable for vegetarians and Halal certified - Hormone-free, zero added sugars, artificial colors or soy protein, assuring a conscientious choice of food supplements for weight gain

Product Specifications

Brand
Reflex
Model
REF131
Colour
Salted Caramel
Size
4.35kg
Format
Personal Care
Domain
Amazon UK
Release Date
01 May 2023
Listed Since
15 October 2021

Barcode

No barcode data available

Similar Products You Might Like

Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Blueberry, 4.35kg)
99% match

Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Blueberry, 4.35kg)

Reflex

£50.99 07 Dec 2025
Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Chocolate Perfection, 2.03kg)
99% match

Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Chocolate Perfection, 2.03kg)

Reflex

£46.49 28 Jan 2026
Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Chocolate Perfection, 4.35kg)
99% match

Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Chocolate Perfection, 4.35kg)

Reflex

£50.99 28 Jan 2026
Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Vanilla Ice Cream, 4.35kg)
99% match

Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Vanilla Ice Cream, 4.35kg)

Reflex

£50.99 28 Jan 2026
Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Strawberries & Cream, 4.35kg)
99% match

Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Strawberries & Cream, 4.35kg)

Reflex

£50.99 28 Jan 2026
Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Strawberries & Cream, 2.03kg)
99% match

Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Strawberries & Cream, 2.03kg)

Reflex

£31.90 29 Jan 2026
Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Cookies & Cream, 4.35kg)
99% match

Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Cookies & Cream, 4.35kg)

Reflex

£50.99 28 Jan 2026
Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Salted Caramel, 5.4 kg)
97% match

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Salted Caramel, 5.4 kg)

Reflex

£41.95 26 Jan 2026
Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Chocolate Perfection, 2 kg)
97% match

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Chocolate Perfection, 2 kg)

Reflex

£23.90 26 Jan 2026
Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Blueberry, 5.4 kg)
97% match

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Blueberry, 5.4 kg)

Reflex

£41.95 26 Jan 2026
Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Vanilla Ice-Cream, 5.4 kg)
97% match

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Vanilla Ice-Cream, 5.4 kg)

Reflex

£41.95 27 Jan 2026
Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Strawberries & Cream, 5.4 kg)
97% match

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Strawberries & Cream, 5.4 kg)

Reflex

£41.95 07 Dec 2025
Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Chocolate Perfection, 5.4 kg)
97% match

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Chocolate Perfection, 5.4 kg)

Reflex

£41.95 31 Jan 2026
Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Choc Peanut Butter, 5.4 kg)
97% match

Reflex Nutrition Instant Mass Heavyweight - Mass Gainer - Over 1000 Kcal per Serving, 60g Protein, Creatine - High Calorie Post Workout or Before Bed Protein Shake (Choc Peanut Butter, 5.4 kg)

Reflex

£41.95 27 Jan 2026
Optimum Nutrition Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Vanilla Flavour, 16 Servings, 5.45KG
96% match

Optimum Nutrition Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Vanilla Flavour, 16 Servings, 5.45KG

Optimum Nutrition

£52.95 01 Feb 2026
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Vanilla, 8 Servings, 2.73 kg, Packaging May Vary
96% match

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Vanilla, 8 Servings, 2.73 kg, Packaging May Vary

Optimum Nutrition

£32.50 13 Jan 2026
USN Hyperbolic Mass French Vanilla 2kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar
96% match

USN Hyperbolic Mass French Vanilla 2kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar

USN

£30.00 27 Jan 2026
Optimum Nutrition Serious Mass - Strawberry 2.73kg, 1250 Cal, 50g
96% match

Optimum Nutrition Serious Mass - Strawberry 2.73kg, 1250 Cal, 50g

Optimum Nutrition

£32.40 16 Feb 2026
USN Hyperbolic Mass French Vanilla 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar
96% match

USN Hyperbolic Mass French Vanilla 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar

USN

£48.95 26 Jan 2026
USN Hyperbolic Mass Strawberry Cheesecake 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar
96% match

USN Hyperbolic Mass Strawberry Cheesecake 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar

USN

£42.40 12 Jan 2026
Dymatize Super Mass Gainer Gourmet Vanilla 2943g - Weight-Gainer Powder + Carbohydrates, BCAAs and Casein
96% match

Dymatize Super Mass Gainer Gourmet Vanilla 2943g - Weight-Gainer Powder + Carbohydrates, BCAAs and Casein

Dymatize

£40.94 07 Dec 2025
Reflex Nutrition 100% Whey Protein - 80% Pure Whey Protein - EAA Amino Acids - No Added Sugar - Whey Protein Powder for Pre Workout & Post Workout Recovery (Vanilla, 2kg, 66 Servings)
96% match

Reflex Nutrition 100% Whey Protein - 80% Pure Whey Protein - EAA Amino Acids - No Added Sugar - Whey Protein Powder for Pre Workout & Post Workout Recovery (Vanilla, 2kg, 66 Servings)

Reflex

£48.99 18 Feb 2026
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 8 Servings, 2.73 kg, Packaging May Vary
96% match

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate, 8 Servings, 2.73 kg, Packaging May Vary

Optimum Nutrition

£29.98 31 Jan 2026
USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer, Cookies & Cream Flavour - 4kg, 54g Protein Powder, 5g Creatine Powder & 5g BCAAs For Maximum Muscle Growth, Post Workout Recovery Drink Mix
96% match

USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer, Cookies & Cream Flavour - 4kg, 54g Protein Powder, 5g Creatine Powder & 5g BCAAs For Maximum Muscle Growth, Post Workout Recovery Drink Mix

USN

£61.49 27 Jan 2026