MK677 - Optimised Research Labs
MK677 - Optimised Research Labs

MK677 - Optimised Research Labs

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Shipping Info

To make your shopping experience with us more enjoyable, we offer a wide range of delivery partners, including Royal Mail, DPD, and UPS. All orders in the UK are trackable. Orders over £79.99 are delivered free of charge.

  • Royal Mail 1 - 3 Working Days*
  • UPS 2 - 5 Working Days*
  • DPD 2 - 4 Working Days*
  • FedEX 2 - 5 Working Days*

* From shipping confirmation email notification being sent. Delivery times are not guaranteed. 

** For orders dispatched to the EU orders shipped can take 5 - 21 working days to reach their destination. It is the customer's responsibility to cover import duties and taxes (if applicable) Please note that we cannot be held accountable for any orders that cannot pass through border customs. You must ensure such orders are legal and allowed by the country to which they are shipped. Orders are not refunded once shipped. By placing your order, you hereby agree to such terms.

Tracking & Delivery 

You will receive a 'Shipping Confirmation' email once your order has been dispatched. It will include tracking information and the courier tracking link you can use to follow the progress of your order. It is imperative to provide your correct email address, otherwise, you will not receive this email. In rare cases, your email provider filters our emails into your spam folder, so please check this folder before contacting us. All orders go through fraud screening. If any issues arise, shipment may be delayed until they are resolved.

If you do not receive your order by the expected delivery date stated, you MUST inform us within 12 hours by emailing us at so we can investigate with the relevant courier immediately. Failure to do so may mean we are unable to remedy the problem which may include a refund or reshipment of your order.

Incorrect delivery information as stated by the customer is the responsibility of the customer who will be charged for carriage if we need to make a collection on their behalf and/or the order needs to be reshipped.

We do need to state that it is the customer's responsibility to ensure they are present to sign for their order. In no way can Just SARMs and/or its couriers be held liable for failed deliveries, unless either party has been negligent in their duty to deliver. 

For full terms and conditions click here.

A very popular and highly effective SARM, MK 677 is a powerful selective-androgen receptor modulator used to build lean muscle mass. MK 677 has a proven ability to stimulate the production of muscle-building hormones such as IGF-1 and HGH, making it an extremely valuable supplement for bodybuilders.

It has also been shown to support fat burning, which makes it ideal for those looking to lose weight while building muscle. It has been shown to increase the amount of testosterone in the body, which can lead to increased muscle mass and strength. This is due to its ability to bind with receptors that are responsible for muscle growth. MK 677 is one of the most effective SARMs on the market today. It’s a potent SARM that can be used by both men and women to build lean muscle mass.

MK 677 supports fat burning and helps you maintain your new muscle tone, making it ideal for those looking to lose weight while building muscle. Because of its ability to stimulate the production of muscle-building hormones, MK 677 has been shown to be highly effective at promoting lean muscle mass without any side effects. It is also very useful for those looking to lose weight while building muscle. This makes it a popular choice for bodybuilders looking for an edge over their competition. 

  • Effective for bulking, cutting or body recomposition
  • Enhances fat loss
  • Promotes healing and injury repair
  • Excellent as a bridge between prohormone cycles
  • Great for increasing aerobic and anaerobic endurance
  • Non-toxic to the liver
  • Non-hormonal
  • Does not require PCT
  • Safe for long-term use (3-6 months recommended)

Key Benefits

  • Increases your levels of IGF-1 and HGH serum
  • Boosts lean muscle mass growth
  • Supports better fat oxidation
  • Promotes faster recovery from training
  • Supports good joint health and the healing of skeletal and connective tissue
  • Increases bone density
  • Tightens skin for more aesthetic skin texture
  • Improves sleep quality and sleep depth
  • Ideally used long term (minimum 3-6 months) for best results
  • Stacks well with any other supplements including SARMs and prohormones

Suggested Use

Take one capsule once a day. 

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