MASS (S4) Andarine
£78.97 £58.97 Add to basket

MASS (S4) Andarine


(11 customer reviews)

125 in stock (can be backordered)

QuantityBulk Purchase Pricing
1 - 20% Discount
3 - 520% Discount
6 - 830% Discount
9 - 10040% Discount

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UK SARMs – MASS (S4) has been compared by researchers to have a similar effect to the anabolic compound Stanazole, however with a slightly higher muscle protecting and muscle building effect. This product is great for body fat reduction and muscle protection during reduced calorie intake and/or intense cardio training.


Due to the fact that S4 (Andarine) binds to androgen receptors, it can increase strength and build lean muscle mass without creating water weight, drying out the joints, stressing the liver, or causing severe suppression or shutdown. What’s more, there is strong evidence that S4 also helps prevent osteoporosis, meaning that it will strengthen bones and soft tissues within the body. Likewise, S4 is great at preventing muscle wasting for those who choose to use it as a bridge between anabolic cycles in order to keep muscle mass gains.


* 99% Pure SARMs
* Pharmaceutical grade
* Manufactured in the UK
* Compounded by UK SARMs’ Pharmacologist
* HPLC Tested
* Free Next Day Delivery UK / Free International Shipping
* Scientific-backed advice and assistance


These products are not for use in preventing, curing, or treating a particular disease or ailments. Sold for research purposes only. Not sold for human consumption.



A dose of 25mg per day for 5 days on and 2 days off per week of Stanazine (S4) is recommended. Each bottle contains 30+ days of use. 1 ml is 3/4 of the dropper or 25 mg. Cycle Length: 8 – 12 weeks. Shake well before use.


Product NameS4
Short NameMass
Alternative NameAndarine
Molecular FormulaC19H18F3N3O6


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11 reviews for MASS (S4) Andarine

  1. Riley (verified owner)

    Very well worth the money.

  2. Armin

    Really pleased with this ostarine vial, arrived incredibly quickly too.

  3. Fergal

    Excellent product, recommended

  4. Jake

    Unreal gains. No joke!🔥🔥

  5. Rico

    Good service, reliable company. Highly recommend

  6. Mark

    Worked well while eating carbs but seemed to lose it’s affect when on a keto diet. Going to try again while on a high carb diet and hopefully get the same results as the first time.

  7. Mikey

    Metabolism has increased massively. Will buy again

  8. Andy

    Fast and efficient✅

  9. Glen

    Gains upon gains since I started using this product. I will never order from anywhere else again #UKSarmz

  10. Johnny

    Could only rate this review 5 stars… if it was my way I’d of put 6! This supplement has finally changed the game within my fitness journey/goals. Good gym routine & a good diet is key.

  11. Peter

    Cheap, reliable. One happy customer 👍🏻😎

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