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FAQs

How much protein is in Gold Standard 100% Whey?

Optimum Nutrition Gold Standard 100% Whey gives 24 g protein per ~30–31 g scoop. Typical vanilla and chocolate panels sit around 113–116 kcal, about 1.3 g fat and under 2 g carbohydrate per serving, with about 5.5 g naturally occurring BCAAs. Whey protein isolate is the first ingredient in the blend. It contains MILK and SOYBEANS (soy lecithin). Protein contributes to the growth and maintenance of muscle mass.

What flavours of Gold Standard whey does GymStack stock?

In-stock Gold Standard 100% Whey flavours include Double Rich Chocolate, Vanilla Ice Cream, Strawberry, Extreme Milk Chocolate, French Vanilla Crème, Banana / Banana Cream, Cookies & Cream, Chocolate Peanut Butter, Chocolate Hazelnut, Chocolate Mint, Chocolate Orange, White Chocolate Raspberry and unflavoured. Sizes run from single sachets and 300–480 g tubs up to about 2.3 kg and 4.5 kg. Availability changes as tubs sell through.

What is the difference between Gold Standard whey and Gold Standard Isolate?

Gold Standard 100% Whey is a whey isolate, concentrate and hydrolysate blend with 24 g protein per scoop. Gold Standard 100% Isolate is filtered further for a higher protein density: 25 g protein per 30 g serving, with very low fat and lactose on the isolate panels. Both contain MILK and SOYBEANS. Clear Whey is separate again: a juice-style isolate drink with 20 g protein per serving.

Is Gold Standard whey Informed Choice certified?

Yes — EU / UK Gold Standard 100% Whey, Gold Standard Isolate and several other Optimum Nutrition lines are listed on the Informed Choice certified products register. Middlesbrough is also an Informed Sport registered manufacturing site, but that is not the same as every SKU carrying Informed Sport batch certification. Check the Informed Choice logo on the specific tub before you buy.

How many calories are in Optimum Nutrition Serious Mass?

One Serious Mass serving (~334–335 g, two scoops) gives about 1,250–1,263 kcal, 50 g protein, around 250 g carbohydrate and 3 g creatine, plus a vitamin and mineral blend. Bags in stock are 2.73 kg and 5.45 kg in Vanilla, Chocolate, Strawberry and Banana. It contains MILK. Mix with water or milk between meals or after training when you need a large calorie load.

How much creatine is in Optimum Nutrition Micronised Creatine?

One serving of Micronised Creatine is 3.4 g of micronised creatine monohydrate powder, which provides 3 g creatine. Unflavoured tubs are stocked in 187 g, 317 g and 634 g, with flavoured 247.5 g options too. 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.

How much caffeine is in Optimum Nutrition Amino Energy?

Essential Amino Energy powder gives 100 mg caffeine per 9 g (two-scoop) serving from green tea and green coffee extracts, plus 5 g amino acids. The Amino Energy + Electrolyte RTD cans also give 100 mg caffeine per 250 ml. It is not suitable for under 18s, or for anyone pregnant or breastfeeding. Keep total caffeine from all sources under 400 mg a day.

How much caffeine is in Gold Standard Pre-Workout?

Gold Standard Pre-Workout powder and the Gold Standard Pre-Workout Shot each provide 175 mg caffeine per serving (one 11 g scoop or one 60 ml shot). The powder also supplies 3.4 g creatine monohydrate (3 g creatine) and 1.5 g beta-alanine. Neither is suitable for under 18s, or for anyone pregnant or breastfeeding. Platinum Pre-Workout is higher still at 200 mg caffeine per serving.

How much protein is in Optimum Nutrition Clear Whey?

Clear Whey is a whey protein isolate drink mixed like a soft drink rather than a milky shake. Each serving gives 20 g protein, 0 g fat, 0 g sugar and about 82 kcal. Flavours in stock include Blackcurrant Dark Berry, Mango & Passion Fruit and Peach in 240 g tubs. It contains MILK. Protein contributes to the growth and maintenance of muscle mass.

How much protein is in Gold Standard 100% Isolate?

Gold Standard 100% Isolate gives 25 g protein per 30 g serving. It is primarily whey protein isolate, so fat and lactose are lower than on the standard Gold Standard whey blend. Chocolate, Strawberry and Vanilla 930 g tubs are the isolate sizes listed here. It contains MILK and SOYBEANS (soy lecithin). Protein contributes to the growth and maintenance of muscle mass.

What sizes of Gold Standard whey are available?

GymStack lists Gold Standard 100% Whey as single sachets (~32 g), small tubs around 300–480 g, mid tubs around 768–908 g, large bags around 2.0–2.3 kg and bulk 4.5 kg tubs. Exact gram weights vary slightly by flavour. Check each product card for the live size and flavour, because stock moves quickly on the core chocolate and vanilla lines.

Does Optimum Nutrition Serious Mass contain creatine?

Yes. Each Serious Mass serving includes 3 g creatine alongside about 1,250 kcal, 50 g whey protein and roughly 250 g carbohydrate. That creatine amount matches the authorised daily intake used for the performance claim. Serious Mass still contains MILK, and the large scoop size means it is aimed at people who need a high calorie surplus, not as a stand-alone creatine powder.

What is Gold Standard Casein used for?

Gold Standard 100% Casein is micellar casein, a slower-digesting milk protein often taken in the evening or between meals. Tub sizes in the range include about 896–924 g and 1.8 kg in flavours such as Creamy Vanilla, Chocolate Supreme, Cookies & Cream and Strawberry. It contains MILK. Protein contributes to the growth and maintenance of muscle mass.

How much caffeine is in the Gold Standard Pre-Workout Shot?

Each 60 ml Gold Standard Pre-Workout Shot provides 175 mg caffeine. Mixed Berry, Lemon & Lime and Cola multipacks (12×60 ml) and some single shots are listed. The shot is not suitable for under 18s, or for anyone pregnant or breastfeeding. Do not stack it with Amino Energy or other caffeine sources without counting toward the 400 mg daily total.

Is Optimum Nutrition creatine Informed Choice?

Optimum Nutrition states that its Micronised Creatine is Informed Choice certified, and creatine products appear alongside Gold Standard whey on Informed Choice materials. Always confirm the Informed Choice mark on the tub you receive. Site-level Informed Sport registration of the Middlesbrough factory is separate from product-by-product Informed Sport batch stickers.

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