*Optimum Nutrition Whey Protein Bundle

September 21, 2025

Pick one of the following to bundle with your 2.2Kg Tub of Optimum Nutrition Gold Standard Whey:

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IsoPure Collagen

April 14, 2025

18g High Protein
20g Collagen Per serving
Sugar Free
Fat Free
72cals

Unflavoured 300g - 15 Servings…

Optimum Nutrition Amino Energy

July 19, 2017

100mg of caffeine - increase mental focus & alertness.
5g amino acids, including BCAAs.
Zero Sugars - just 29 cals.

30 Servings…

Optimum Nutrition Clear Protein

July 20, 2023

20 g of premium-quality plant protein per serving
3.6 g of naturally occurring BCAA amino acids per serving
Zero sugar
100% vegan ingredients

Contains 280g…

Optimum Nutrition Clear whey protein isolate + collagen

Optimum Nutrition Clear Whey Protein + Collagen Free ON Shaker

May 22, 2025

Muscle & Joint Support*
10 g of whey protein isolate per serving
10 g of collagen peptides per serving

Contains 240g…

Optimum Nutrition Collagen Peptides

December 11, 2025

✓ 20g Collagen with Vitamin C ✓ Zero sugar, no sweeteners 400g - 20 Servings Unflavoured…

Optimum Nutrition Creatine Capsules

July 22, 2017

Increase performance during high intensity training.
2.5 g of pure Creatine Monohydrate.
Two servings a day has been proven to increase muscle power during high intensity exercise.
Take 2 capsules with your three main meals.

100 Servings…

Optimum Nutrition Creatine Powder 317g

November 19, 2017

Increase performance during high intensity training.
3.4 g of pure Creatine Monohydrate to increase muscle power.
Mixes easily with no gritty taste.
Mix with water, juice or your ON shake.

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Optimum Nutrition Creatine Powder 634g

September 29, 2025

Increase performance during high intensity training.
3.4 g of pure Creatine Monohydrate to increase muscle power.
Mixes easily with no gritty taste.
Mix with water, juice or your ON shake.

…

Optimum Nutrition Creatine Powder Flavoured

May 16, 2025

Increase performance during high intensity training.
3.4 g of pure Creatine Monohydrate to increase muscle power.
Mixes easily with no gritty taste.
Mix with water, juice or your ON shake.

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Optimum Nutrition Electrolyte Powder

May 22, 2025

For intense training sessions
Delivers key electrolytes—400 mg sodium, 113 mg magnesium, and 300 mg potassium per serving
Helps support hydration and muscle function* after heavy sweating.

Contains 264g - 33 Servings…

Optimum Nutrition Glutamine

July 11, 2021

5 g L-Glutamine per serving
Take at any time
Unflavoured powder

630g - 120 servings 1050g - 205 servings…

optimum nutrition casein Protein gold standard

Optimum Nutrition Gold Standard 100% Casein

January 27, 2019

Support Muscle Growth & Repair Overnight.

24 g of Pure Micellar Casein but just 0.5 g of fat and no added sugars.

Before Bed
Slow Digesting
Supports Muscle Growth & Maintenance

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Optimum Nutrition Gold Standard 100% Isolate Whey

September 18, 2019

Hydrolyzed & Ultra-Filtered Whey Protein Isolate
1 Gram of Carbs Per Serving
5.5 G BCAAs
4.3 G Glutamine & Glutamic Acid
11.4 G Essential Amino Acids

930g Tub …

Optimum Nutrition Gold Standard 100% Plant Protein

November 25, 2018

24 Grams of Organic Plant Protein Per Serving
Complete Profile of Essential Amino Acids
4 Grams of Naturally Occurring BCAAs
4 Grams of Naturally Occurring Glutamine
100% of the Daily Value for Vitamin C
Outstanding Flavor & Mixability

684g Tub…

Optimum Nutrition Gold Standard BCAA

November 19, 2017

5 g BCAAs in 2:1:1 ratio
Magnesium and vitamin C to reduce tiredness and fatigue
Unique formula - contains Rhodiola rosea, Wellmune® and a blend of electrolytes.
Banned substance tested

28 Servings…

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Optimum Nutrition

MyCore Supplements stocks the largest range of Optimum Nutrition products in Ireland. The Optimum Nutrition range includes the world famous Gold Standard Whey Protein, Serious Mass Weight Gainer, Amino Energy, Pre-Workout, Opti-Men & Opti-Women Vitamins as well as Fish Oils and other products to help you achieve your goals.

Showing 1–16 of 32 results

Sale!
*Optimum Nutrition Whey Protein Bundle

From €69.99 Select options This product has multiple variants. The options may be chosen on the product page
IsoPure Collagen

€26.90 Select options This product has multiple variants. The options may be chosen on the product page
Sale!
Optimum Nutrition Amino Energy

€21.99 Select options This product has multiple variants. The options may be chosen on the product page
Optimum Nutrition Clear Protein

€24.99 Select options This product has multiple variants. The options may be chosen on the product page
Optimum Nutrition Clear Whey Protein + Collagen *Free ON Shaker*

From €24.99 Select options This product has multiple variants. The options may be chosen on the product page
Optimum Nutrition Collagen Peptides

€24.99 Add to basket
Optimum Nutrition Creatine Capsules

€34.99 Add to basket
Optimum Nutrition Creatine Powder 317g

€17.99 Add to basket
Optimum Nutrition Creatine Powder 634g

€29.99 Add to basket
Optimum Nutrition Creatine Powder Flavoured

From €14.99 Select options This product has multiple variants. The options may be chosen on the product page
Sale!
Optimum Nutrition Electrolyte Powder

€11.99 Select options This product has multiple variants. The options may be chosen on the product page
Optimum Nutrition Glutamine

From €29.99 Select options This product has multiple variants. The options may be chosen on the product page
Optimum Nutrition Gold Standard 100% Casein

From €41.99 Select options This product has multiple variants. The options may be chosen on the product page
Optimum Nutrition Gold Standard 100% Isolate Whey

€42.99 Select options This product has multiple variants. The options may be chosen on the product page
Optimum Nutrition Gold Standard 100% Plant Protein

€24.99 Select options This product has multiple variants. The options may be chosen on the product page
Optimum Nutrition Gold Standard BCAA

€25.99 Select options This product has multiple variants. The options may be chosen on the product page