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Cookies and cream

Best flavour ordered chocolates one this time 💪🏻

Fantastic stuff

Love this stuff has helped me put on the weight that was needed. Use it as part of breakfast and as a post workout

Not just for gaining weight

I use this for breakfast and pre training for fuel and with the high amount of carbs it’s an easy option pre training or pre race. Strawberry and chocolate flavours are great

Need help? Email or DM us on @nisupplements

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Optimum Nutrition Serious Mass

Name: Optimum Nutrition Serious Mass 5.4kg
Brand: Optimum Nutrition
SKU: P4253S
Price: 49.99 GBP
Availability: InStock

Serious Mass is the ultimate in weight gain formulas. Serious Mass supplies you with the tools you need to pack on the pounds and develop the physique you've always wanted.

1250 Calories per serving in water

1640 Calories when made with low-fat milk

Over 250 g of carbohydrates - with no added sugar

Includes Creatine, L-glutamine & Glutamine Peptides, Choline, Inositol, and MCTs

Source of protein: contains 50 g of protein per serving

Nutritional Information Per Serving (based on Cookies & Cream Flavour)

Energy: 1266 kcal / 5297 kJ

Protein: 50 g

Total Carbohydrates: 252 of which Sugars: 26 g

of which Dietary Fiber: 0.6 g

Fat: 6.2 of which Saturates: 3.2 g

Salt: 3.4 g

Amounts Per Serving (based on Cookies & Cream Flavour

Vitamin A: 306 µg, Vitamin D: 1.9 µg, Vitamin E: 3.6 mg, Vitamin C: 22 mg, Thiamin: 0.53 mg, Riboflavin: 0.67 mg, Niacin: 6.9 mg, Vitamin B6: 0.76 mg, Folic Acid: 75.2 µg, Vitamin B12: 12 µg, Biotin: 56 µg, Pantothenic Acid: 2.2 mg, Potassium: 302 mg, Chloride: 1099 mg, Calcium: 417 mg, Phosphorus: 189 mg, Magnesium: 17.4 mg, Iron: 1.4 mg, Zinc: 0.81 mg, Copper: 0.10 mg, Manganese: 0.17 mg, Chromium: 39 µg, Iodine: 15.3 µg, Sodium: 416 mg

Cookies & Cream:Maltodextrin, Whey Protein Concentrate, Calcium Caseinate (Emulsifier; Soy Lecithin), Flavourings, Cookie Crumb (1.4%) (Wheat Flour [Gluten], Sugar, Fully Hydrogenated Vegetable Fats; Palm and Rapeseed in varying proportions; Fat-Reduced Cocoa Powder), EGG Albumen, Sodium Chloride, Medium Chain Triglycerides, Dipotassium Phosphate, Creatine Monohydrate, Choline Bitartrate, L-Glutamine, Glutamine Peptides [Gluten], Whey Powder, Inositol, Vitamin Blend (L-Ascorbic Acid, Nicotinamide, DL-Alpha-Tocopheryl Acetate, Calcium D-Pantothenate, Pyridoxine Hydrochloride, Riboflavin, Thiamin Hydrochloride, Retinyl Acetate, Pteroylmonoglutamic Acid, D-Biotin, Cholecalciferol, Cyanocobalamin), Sweetener (Sucralose), Magnesium Oxide, Potassium Chloride, Ferric Pyrophosphate, Zinc Oxide, Cupric Gluconate, Manganese Sulphate, Chromium (III) Chloride Hexahydrate, Potassium Iodide

Delivery Terms & Conditions / Options & Information

Operated by: Nutrition & Internet Supplements Limited (trading as “NI Supplements”)

Registered Office: Unit 5, Graham Industrial Park, Dargan Crescent, Belfast, Co. Antrim, BT3 9LP, United Kingdom

Last updated: 11 October 2025

1. Dispatch & Processing

Orders placed before 1 p.m. UK time (Monday–Saturday, excluding Bank Holidays) are normally processed and dispatched the same working day.
Orders placed after this time are processed on the next working day.
Delivery timeframes exclude Sundays and public holidays unless explicitly stated otherwise.
Courier network disruptions (e.g., strikes, weather, customs) may extend delivery times beyond our control.

2. Delivery Options – United Kingdom (Mainland & Northern Ireland)

Orders under £50

Service	Price	Estimated Speed	Notes
1–2 Day Tracked (No Signature Required)	£2.95	1–2 working days (91% next-day)	Fully tracked; photographic & GPS delivery proof confirms delivery. “No Signature Required” terms apply.
1–2 Day Tracked (Signature Required)	£3.35	1–2 working days (91% next-day)	Signature obtained on delivery.

Orders £50 and over

Service	Price	Estimated Speed	Notes
4–5 Day Tracked (No Signature Required)	Free	4–5 working days	Fully tracked; photo/GPS proof confirms delivery. “No Signature Required” terms apply.
4–5 Day Tracked (Signature Required)	Free	4–5 working days	Signature obtained on delivery.

3. Delivery Options – Republic of Ireland, EU & International

Available services, prices and estimated transit times are displayed at checkout.
Delivery times vary by destination and customs clearance processes.
Recipients are responsible for any local import duties, taxes, or customs charges.
We cannot influence or expedite customs procedures in destination countries.

4. Delivery Confirmation, Risk & Transfer of Responsibility

(a) Signature Required

A signature will be obtained at the point of delivery.
Until a signed handover occurs, the parcel remains at NI Supplements’ risk.
Once signed for by you or a nominated recipient, delivery is complete and responsibility transfers to you.

(b) No Signature Required / Authority to Leave

By selecting “No Signature Required” or authorising an unattended delivery / safe place, you:

Expressly instruct the courier to deliver the parcel to your address or nominated safe place without obtaining a signature.
Acknowledge that the courier’s photo and GPS confirmation constitute full proof of delivery.
Accept that once such confirmation is recorded, the order is deemed successfully delivered, and
Agree that risk of loss, theft or damage passes to you immediately upon that confirmation.

Accordingly, NI Supplements’ delivery obligation is fully discharged once the courier records a delivered scan with accompanying GPS/photo evidence.

If you are concerned about parcel security at your address, please select “Signature Required” at checkout. This is recommended for high-value orders or where the delivery location is unattended or visible from a public street.

5. Non-Delivery Claims

All non-delivery reports are investigated directly with the courier.
Where the courier provides proof of delivery (signature, photo or GPS record) matching the supplied address, the order is considered fulfilled and is not eligible for replacement or refund under this policy.
Where the courier confirms no delivery, we will either resend or refund the order promptly.

6. Failed Delivery, Refusals & Returns to Sender

If a parcel is returned due to customer error (e.g., incorrect address, failure to collect, or refusal of delivery), we may either:
- Resend it after payment of a re-shipping fee; or
- Refund the product value less the original outbound shipping cost.
Where the error or delay was caused by NI Supplements or our courier, we will resend at our expense.

7. Same-Day Dispatch Guarantee (Express Orders)

Guaranteed for orders placed before 1 p.m. (Monday–Saturday).
Couriers may experience exceptional delays beyond our control; such events do not invalidate the guarantee for dispatch timing.

8. Working Days Definition

“Working Days” means Monday to Saturday, excluding UK Bank Holidays. Orders placed after 1 p.m. on a Saturday or on a Bank Holiday are processed on the next working day.

9. Evidence & Investigation

We maintain courier records, including time-stamped tracking data, GPS coordinates and photographic delivery evidence, for audit and anti-fraud purposes. Customers alleging non-receipt after confirmed delivery may be asked to provide a police crime reference number. We reserve the right to cooperate with carriers and authorities in any fraud investigation.

10. Contact Information

For questions about delivery status or services, please contact:
hello@nisupplements.com
Nutrition & Internet Supplements Limited, Unit 5 Graham Industrial Park, Dargan Crescent, Belfast, Co Antrim, BT3 9LP, United Kingdom.