Optimum Nutrition Gold Standard 100% Whey Protein Powder

Name: Optimum Nutrition Gold Standard 100% Whey Protein Powder
Brand: GymBum UK
Price: 42.32 GBP
Availability: InStock

Engineered with purpose. Worn with confidence

£42.32

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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.

Optimum Nutrition Gold Standard 100% Whey is the world's #1 selling whey protein powder. Fast-absorbing and easy to mix, it's ideal for supporting muscle growth and recovery before or after every training session.

With Whey Protein Isolate as the primary ingredient, each serving delivers 24g of high-quality protein, naturally occurring BCAAs, and glutamine — keeping you on track with your fitness goals.

24g protein per serving
Whey Protein Isolate as the #1 ingredient
Naturally occurring BCAAs and glutamine
Low in sugar and fat
Smooth, clump-free mix — just add to water, milk, or your favourite drink
Suitable for vegetarians
Informed Choice certified
Available in a range of great-tasting flavours

How to use: Add 31g (~1 heaped scoop) to 180–240ml of cold water and shake or blend until dissolved. Best enjoyed first thing in the morning or within 30 minutes before or after training.

Ingredients (Double Rich Chocolate): Whey Protein Blend (93%) [Milk] (Whey Protein Isolate, Whey Protein Concentrate, Hydrolysed Whey Protein Isolate, Emulsifier: Soy Lecithin), Fat-Reduced Cocoa Powder, Flavourings, Thickener (Xanthan Gum), Sweeteners (Sucralose, Acesulfame K).

May contain gluten. Not suitable for persons under 18. Food supplements are not a substitute for a varied and balanced diet.

Size Guide

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Optimum Nutrition Gold Standard 100% Whey Protein Powder