Are you new to supplements?
Are you new to supplements?
Learn more about proteinOur Protein Powders

Gold Standard 100% Whey Protein
Provides 24 g fast‑absorbing whey protein with 5.5 g BCAAs to support muscle growth and maintenance. Best used post‑workout or anytime to help meet daily protein goals.

Gold Standard 100% Isolate Protein
Delivers 25 g ultra‑filtered whey isolate with very low sugar and fat for lean protein support. Best used when you want a light, clean whey option before or after training.

Platinum Hydrowhey
Features hydrolysed whey isolate for ultra‑fast protein delivery after intense training. Best used when you need the fastest‑digesting whey to support rapid post‑exercise intake.

Serious Mass Gainer
Serious Mass delivers 1,250 calories, 50 g protein and over 250 g carbs per serving to support weight gain and muscle growth. Best used post‑workout or between meals to help achieve a calorie surplus.

Gold Standard 100% Casein
Provides about 24 g slow‑release casein protein for sustained amino acid delivery. Best used before bed or during long gaps to support steady protein intake.

Gold Standard 100% Plant Protein Powder
Offers 24 g plant‑based protein in a smooth, creamy shake suitable for vegans. Best used as a dairy‑free daily protein source to support active lifestyles.

Clear Protein 100% Plant Protein Powder
Provides 20 g hydrolysed pea protein and 3.6 g BCAAs, all sugar‑free in a refreshing clear drink. Best used pre‑ or post‑workout for a light, non‑milky plant protein option.

Clear Whey Protein Isolate + Collagen Powder
Combines about 20 g protein from whey isolate and collagen in a clear, juice‑style formula. Best used whenever you want a light, refreshing protein boost instead of a creamy shake.

Collagen Peptides
Supplies around 20 g hydrolysed collagen in an easy‑mix, neutral‑tasting format. Best used daily in drinks to add extra protein as part of an active routine.
Protein On The Go

Protein Bars
Each bar provides 18 g high‑quality protein to support muscle repair and satisfy cravings in a convenient on‑the‑go format. Best used post‑workout or as a quick protein snack anytime.

High Protein Shake
This ready‑to‑drink shake delivers 25–50 g of protein in a low‑fat, no‑added‑sugar format for easy daily protein support. Best enjoyed after training or between meals for convenient protein intake.

Protein Water
Protein Water provides 16 g whey protein isolate in a light, refreshing, sugar‑free drink with just 64 calories. Best used post‑workout or on‑the‑go when you want a hydrating, low‑calorie protein boost.

Used by elite athletes
Marcus Smith, one of rugby’s most exciting and creative playmakers uses GOLD STANDARD 100% WHEY as part of his diet. It plays a pivotal role in his performance and recovery at the highest level.

Start With the Essentials
- Protein is one of the main building blocks your body needs to stay strong and healthy.
- It helps maintain and grow muscle mass,* which is essential for an active lifestyle.
What Makes Us Different?
♛ Unmatched Heritage & Leadership
We hold ourselves to The Gold Standard for quality & taste.
★ Best-in-Class Quality
Quality is in our DNA and has been central to our brand and products since 1986.
✓ Proven, Trusted Performance Across the Globe
Athletes across all sports and levels choose OPTIMUM NUTRITION, making us the #1 Whey Protein Brand in the World and #1 Creatine Brand in the US and UK.
FAQ
What is protein powder?
Protein powder is a dietary supplement that provides a concentrated source of protein derived from foods such as milk (e.g., whey, casein) or plants (e.g., pea, rice, soy).
Protein powders are made by extracting protein from whole foods, often removing most fats and carbohydrates along the way. Common sources include cow’s milk (whey, casein), eggs, soy, peas, and rice.
People use protein powders to conveniently increase protein intake, especially when dietary intake is insufficient. Protein contributes to muscle maintenance and growth and supports normal bodily functions.*
Best protein powder for women?
The best protein powder for women depends on individual goals, dietary preferences, and digestion. There’s no single “best,” but expert reviews consistently highlight high‑quality whey isolates and clean plant‑based options.
Women often look for protein powders that provide 20–25 g of high‑quality protein, are easy to digest, and support overall daily protein intake—especially when whole‑food protein is harder to meet.
Whey isolates remain a popular option because of their strong amino acid profile and good digestibility
Who is this product for?
This product is ideal for athletes and active individuals looking to support muscle growth, maintain muscle mass, and support joint health, all while enjoying a refreshing addition to their daily protein routine.
When should I take it?
You can enjoy this product throughout the day. In the morning, it’s a great way to kickstart your day by replenishing essential proteins after an overnight fast. Before your workout, it helps fuel your muscles with readily available amino acids to support performance. And during the day, it serves as a light, refreshing option to help you meet your daily protein goals between meals.
How much protein do I need every day?
How much protein you need daily is based on your age, weight and how intense or often you exercise. The current recommended daily intake for someone who exercises is between 1-2g/kg body weight. Those who exercise regularly should aim to eat about 1.6g/kg body weight, that means if you are 70 kg (70 x 1.6) you need 112g protein daily. This extra protein will ensure your body has the correct building blocks to support your muscles growth and repair. If your goal is to increase lean muscle mass you need even more protein to support your resistance training programme and should aim for approximately 2g/kg body weight. Hitting higher protein intakes can be challenging and although we always advise ‘food first’, it is not always possible to hit your daily protein requirements from food alone. In this instance a protein shake is a tasty way to get high quality protein into your diet, helping you hit your daily protein targets. Also, a protein shake is convenient and may be a much better option than a chicken breast straight after training!
How to choose the right protein powder?
hoosing the right protein powder depends on your goals, digestion, and dietary preferences. Below is a simplified comparison of the most relevant protein types including whey isolate, plant‑based, hydrolyzed whey, and casein.
1. Whey Protein Isolate
A high‑purity protein with minimal lactose and fast absorption—ideal for post‑workout or convenient daily supplementation.
Choose if you want:
- Fast digestion
- High-quality amino acid profile
- Low lactose
2. Plant‑Based Protein
A great option for dairy‑free diets, often with additional micronutrients such as iron, which many women under-consume.
Choose if you want:
- Vegan or dairy‑free formula
- Higher fiber content
3. Hydrolyzed Whey (HydroWhey / Hydrolyzed Whey Isolate)
Hydrolyzed whey is pre‑digested into smaller peptides for extra‑fast absorption, making it suitable for athletes or intense training schedules. It’s often recommended when rapid amino acid delivery is desired.
Choose if you want:
- The fastest possible absorption
- A lighter, easier‑to‑digest whey option
- Support during high‑frequency or intense training
4. Casein Protein
Casein digests slowly, providing a sustained release of amino acids. This makes it ideal before bed or during long periods without food.
Choose if you want:
- Slow, steady protein release
- Support overnight or between long meals
- A thicker, more satiating shake
Want to learn more?
From daily intake to how it can support your training goals – get to grips with what protein is and why it matters.

How much protein do you...
Daily protein needs are not one-size-fits-all; they depend on factors like age, weight, and activity level. Different types of exercises, from...

Which protein powder is right...
There are so many different types of protein shakes out there that it is hard to know which one suits your goals. Each shake has its...
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Official Claims:
* Protein contributes to growth and maintenance of muscle mass with regular weights resistance training.









