Optimum Nutrition Serious Mass

High-Calorie Weight Gainer

Optimum Nutrition Serious Mass is the ultimate in weight gain formulas. With 1,250 calories per serving and 50 grams of protein for muscle recovery support, this instantised powder makes the ideal post-workout and between meals shake for sizing up your goals. Serious Mass provides you with the tools you need to pack on the pounds and help you develop the physique you’ve always wanted.

Optimum Nutrition Serious Mass: Key Features

• Adding Calories Has Never Been This Easy or Tasted So Good
• 1,250 Calories Per Serve
• 50 Grams of Blended Protein
• Over 250 Grams of Carbohydrates with NO ADDED SUGAR
• Creatine, Glutamine, and Glutamic Acid
• 25 Vitamins and Essential Minerals

Recommended Use

Mix 1-2 scoops Optimum Nutrition Serious Mass with 400-700ml of cold water or milk and mix with using an electric blender. This allows to you add in fruits, peanut butter and other calorie-contributing foods. For best results consume post-workout and/or between meals to add calories, carbs and protein to your healthy, balanced diet.

Shipping

Orders placed before 3 pm (Mon–Fri) are packed and shipped the same working day. Orders placed after 3 pm are shipped the next business day.

Delivery is within New Zealand only via NZ Post or NZ Couriers. North Island delivery typically takes 12–48 hours, South Island delivery takes 24–72 hours. Please allow extra time for rural addresses or during busy periods.

Free shipping on orders over NZ$100. Orders under NZ$100 start from NZ$7, calculated at checkout based on weight and delivery address.

Tracking details are emailed upon dispatch. Customers can follow delivery progress and should contact the courier directly for delays.

Inspect goods upon arrival and report any courier damage immediately.

Returns & Refunds

Contact ASN Online within 14 days of receiving your order to request a return. Proof of purchase is required, and items must be unused and in their original condition.

Clearance items, sale items, gift cards, free gifts, short-expiry, and hardened products are not eligible for return.

Return shipping costs are the responsibility of the customer and are non-refundable. Original shipping charges are deducted from any refund.

Faulty items must be reported within 14 days. If confirmed faulty, return shipping costs will be refunded; otherwise, the item will be sent back to the customer.

Unopened products may be returned within 14 days with prior approval. Returns are subject to inspection, and a 15% restocking fee may apply.

Orders can be cancelled any time before they are shipped for a full refund.

If a parcel is undeliverable due to an incorrect address, extra charges may apply to resend.

All rights under the NZ Consumer Guarantees Act 1993 apply.