Advanced Muscle Stack

Dexterz Labs products are manufactured in the UK to a fixed strength per capsule with the batch number printed on every bottle. Every batch is independently tested and its certificate of analysis is published on the product page and on the Lab Testing page. If you need the batch report for research records, contact sales@sarmsstore.co.uk with your batch number.

Orders placed before 2pm Monday to Friday are dispatched the same day. Tracked UK delivery is free over £60 (£3.49 below), usually two to three working days, with a next day upgrade for £4.49 at checkout. Packaging is plain with no product names on the outside.

Unopened products can be returned within 30 days of delivery for a full refund, and faulty items within 14 days.

Is this bundle legal in the UK in 2026? None of the compounds in this bundle is controlled under the Misuse of Drugs Act 1971, so buying and holding them as research chemicals is lawful in the United Kingdom in 2026. Selling or advertising any of them for human use would make them unlicensed medicines under MHRA rules, which is why this listing carries no usage guidance.

How fast is delivery? We despatch UK orders the same working day by tracked delivery, usually arriving within two to three working days, with a next day upgrade available at checkout, in discreet plain packaging that carries no product or compound name on the outer label. International shipping is offered to most countries, subject to a restricted destination list shown at checkout where local import rules apply.

How should the capsules be stored? The bottle should be kept closed in a cool, dry place below 25C, out of direct light. Handled that way the capsules hold to the shelf life on the label. Do not decant into unlabelled containers, because the batch number on the original bottle is what ties the material to its certificate of analysis.

Are these compounds banned in sport? Yes, all of them, at all times. The SARMs fall under section S1.2 of the WADA prohibited list, MK-677 under section S2 as a growth hormone secretagogue, and cardarine and SR-9009 under section S4.5 as metabolic modulators. Detection methods exist for each.

What makes this different from the intermediate bundle? It adds YK-11, the least studied compound in the range and the only steroidal one here. That is a change in character, not simply one more bottle: the other three have animal or human data with measured endpoints, while YK-11 has cell culture work only.

Research use only. This product is supplied strictly for laboratory and research purposes and is not for human consumption. It is not a medicine, it is not a food supplement, and it is not intended to diagnose, treat, cure or prevent any disease. Sold to persons aged 18 or over only.