Optimum Nutrition Gold Standard Pro Gainer

Optimum Nutrition Gold Standard Pro Gainer is a high-protein weight gainer for active people who find it hard to eat enough. Each 165 g serve provides 650 Calories, 60 g of protein and 81 to 82 g of carbohydrate depending on flavour, plus 20 vitamins and minerals. It is designed to add to your meals, not replace them. Supps247 stocks Double Chocolate and Vanilla Custard.

Key features

• 650 Calories and 60 g protein per 165 g serve
• 81 to 82 g carbohydrate per serve, depending on flavour, according to Optimum Nutrition Australia
• Protein blend of whey protein isolate, whey protein concentrate, calcium caseinate and hydrolysed whey protein
• 20 vitamins and minerals, including 600 mg calcium and 7.5 mg iron per serve (Double Chocolate)
• Banned substance tested, according to the label
• The 5 lb (2.31 kg) tub is labelled 14 serves

Nutrition information

Per 165 g serve (Double Chocolate). Values vary slightly between flavours.

The tub carries a Nutrition Facts panel that declares energy in Calories. The kJ figure is converted.

Ingredients

Double Chocolate: maltodextrin, protein blend (whey protein isolate, whey protein concentrate, calcium caseinate, hydrolysed whey protein), cocoa (processed with alkali), medium chain triglycerides, sunflower oil, natural and artificial flavour, sunflower and/or soy lecithin, vitamin and mineral blend (dimagnesium phosphate, tricalcium phosphate, calcium carbonate, sodium ascorbate, DL-alpha tocopheryl acetate, ferrous fumarate, biotin, niacinamide, vitamin A acetate, zinc oxide, copper gluconate, D-calcium pantothenate, manganese sulphate, pyridoxine hydrochloride, riboflavin, thiamin hydrochloride, potassium iodide, cyanocobalamin, folic acid), salt, sucralose, acesulfame potassium.

Allergens: contains milk and soy.

How to use

Add one heaping scoop to about 475 mL (16 fl oz) of water, milk or another drink in a shaker cup, and shake until fully mixed. Use it with a healthy, balanced diet and exercise program.

Good to know

• Contains milk and soy.
• For healthy adults, Optimum Nutrition advises getting enough energy from a mix of high quality foods and supplements through the day, as part of a balanced diet and exercise program.
• Mixing with milk adds energy and protein on top of the label values.

FAQs

How many calories are in one serve?

One 165 g serve lists 650 Calories (about 2,720 kJ) when mixed with water, with 60 g of protein, 81 to 82 g of carbohydrate and 9 g of fat. Mixing with milk adds the milk's own energy and protein on top.

How many serves are in the 5 lb and 10 lb tubs?

The 5 lb (2.31 kg) tub is labelled 14 serves at 165 g each. The 10 lb tub holds about twice as much powder. Listings for the 10 lb size quote different serve counts, so check the label on the tub you buy.

When should I take it?

Optimum Nutrition positions Pro Gainer as a post-workout shake or a between-meal option to raise your calorie intake. The brand notes its muscle recovery and calorie claims apply when it is taken over time with regular resistance training.

Is it suitable for people with allergies?

It contains milk and soy. The protein comes from whey and casein, so it is not suitable for anyone with a milk allergy. Check the label for any other allergens before use. Compare options in our weight gainer range.

Label details checked against Optimum Nutrition Australia on 9 October 2026. Formulas can change, so always check the label on the product you buy.

Always read the label and follow the directions for use.

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Orders under $99.99 ship for a flat $12.98 AUD.

Delivery estimates are shown at checkout. In-store pickup is available at our Melbourne stores.