GBP · £
USD · $
EUR · €
CAD · C$
AUD · A$
Ostarine (MK2866)
MK-2866 is a milder SARM used to hold lean mass when calories drop. Tissue-selective for muscle and bone. Typical dose 20 mg. 60 capsules.
Subscribe for updates
This product is currently out of stock. Leave your email and we will notify you when Ostarine (MK2866) is back.
You'll earn 44 points on this order
Ostarine is a milder SARM used to hold lean mass when calories drop, and to add lean tissue in a surplus. It binds the androgen receptor in muscle and bone. Typical dose on the listing is 20 mg. Typical window 8-12 weeks.
It is a selective androgen-receptor modulator. Binding AR in skeletal muscle is anti-catabolic - that is why lean tissue holds when food comes down. The original research job was stopping muscle waste. That is still the reason it sits on a cut or a recomp.
It is the SARM on this store for holding muscle on a cut. Fat can come off. The lean mass is the part you keep. A common cut stack is Cardarine (Lean Muscle Stack / Shredded AF).
No. Ostarine does not need a PCT plan. RAD 140 does. Do not copy a RAD PCT line onto this page.
Same receptor family. Ostarine is milder and used to hold lean mass on a cut. RAD 140 is the stronger choice for size and strength, and it always needs a PCT plan.
Every batch is independently tested by a third-party lab before it is released for sale. Research products sold by APH Science are strictly for research purposes only and are not intended for human consumption. Consult a healthcare professional before use.
Are you currently natural (no PEDs / SARMs)?
What's your main goal right now?
Testimonials
Key benefits
Holds lean mass
Ostarine (MK-2866) is a selective androgen receptor agonist. It was researched to stop muscle waste. That is why lean tissue holds in a deficit, and why it can still add lean mass in a surplus.
Try now
Milder SARM
MK-2866 is tissue-selective for muscle and bone. Same receptor as testosterone, not a steroid, and milder than RAD 140 or Ligandrol. That is why it is often a first choice for SARM beginners.
Try now
No PCT
Ostarine does not need a PCT plan. That is the milder SARM, not RAD 140. A common cut stack is Cardarine.
Try now
Holds lean mass
Ostarine (MK-2866) is a selective androgen receptor agonist. Binding AR in skeletal muscle is anti-catabolic, so lean tissue holds when food comes down.
The original research job was stopping muscle waste. That is still the reason it sits on a cut or a recomp, not as a mass SARM like RAD 140.
-
Anti-catabolicAR in muscle. That is how the tissue holds when calories drop.
-
Muscle and boneTissue-selective. Same receptor testosterone uses, different molecule.
-
Typical dose 20 mg60 capsules. Typical window 8-12 weeks. Listing spec, not an instruction to take.
Milder than RAD and LGD
Same receptor family as Testolone and Ligandrol. MK-2866 is the milder ligand. That is why it is often a first choice for SARM beginners.
It is still an androgen-receptor ligand. It is not a steroid, and it does not convert to oestrogen the way testosterone can.
-
Muscle and boneTissue-selective for skeletal muscle and bone.
-
Not a steroidAndrogen-receptor ligand. Same lock, different molecule.
-
Not RAD-140Milder start. RAD is the size and strength SARM.
Holds through a cut
When calories drop, the job is keeping the muscle you already have. Ostarine is used so lean mass holds while fat comes off.
A common cut stack is Cardarine. No PCT required.
-
DeficitFood comes down. The lean mass is the part you keep.
-
Fat can come offTighter look from less fat on the same tissue.
-
No PCTNot RAD 140. No PCT required.
Product FAQs
Contact us Contact usWhat is Ostarine (MK-2866)?
Ostarine is a milder SARM used to hold lean mass when calories drop, and to add lean tissue in a surplus. Typical dose on the listing is 20 mg.
How does Ostarine work?
It is a selective androgen-receptor modulator. Binding AR in muscle is anti-catabolic - that is why lean tissue holds when food comes down.
Does Ostarine require PCT?
No. Ostarine does not need a PCT plan. RAD 140 does.
Is this for human consumption?
No. Research products are for laboratory research only. Consult a qualified professional and follow your institutional rules.
Ostarine vs RAD 140?
Ostarine is milder and used to hold lean mass on a cut. RAD 140 is the stronger choice for size and strength, and it always needs a PCT plan.
Selectivity and tissue targeting
Many SARMs are studied for preferential action in muscle and bone versus broader androgen effects. Exact selectivity depends on the molecule - do not assume every SARM behaves like every other.
What is the typical dose?
Typical dose on the listing is 20 mg. 60 capsules. Typical window 8-12 weeks.
Storage
Keep sealed, cool, and dry away from direct light. Follow any lot-specific storage guidance included with your order.
Can it be stacked with other research products?
A common cut stack is Cardarine. Use the product pages, not social media cycle sheets.
What makes Ostarine different in the APH catalogue?
Ostarine (MK-2866) is the milder SARM on this store, used to hold lean mass on a cut. No PCT required.
Who typically buys Ostarine?
Buyers usually arrive looking for a specific training or research goal and want a labelled, consistently supplied product from a UK-facing brand. Ostarine should be chosen only when it matches that goal and the product category on this page.
If you are unsure, use the on-page quiz (where shown), read the FAQs, or contact support before ordering multi-bottle quantities.
How should I store Ostarine?
Store Ostarine sealed in a cool, dry place away from direct sunlight, moisture, and heat sources. Keep out of reach of children. Do not use if the seal is broken or the product looks compromised.
Follow any extra storage notes on the label (for example cold-chain guidance on certain research formats).
Is this suitable to stack with other APH products?
Many customers build multi-product carts (for example a primary compound plus recovery support). Whether Ostarine fits a stack depends on the product class and your goal - use the description, FAQ, and quiz on this page as a starting point.
This is catalogue guidance only, not medical advice. When in doubt, keep the stack simple and verify compatibility yourself.
What makes APH Science different for this product?
Ostarine (MK-2866) is the milder SARM on this store, used to hold lean mass on a cut. No PCT required.
What dose is on the Ostarine label?
Use the milligram dose printed on the bottle and this page.
Can I stack Ostarine with other APH products?
Stack only what matches this product class. Check the description on this page rather than generic recovery or strength copy from another SKU.
This is catalogue guidance only, not medical advice.
What shipping and cart benefits apply when I buy Ostarine?
Ostarine counts toward free UK shipping over £100, free protein gift thresholds, and next-day gift tiers in the same cart as every other APH Science product. Discrete packaging is standard. Tracked options are available at checkout depending on destination and service level.
How should I store Ostarine after delivery?
Store Ostarine in a cool, dry place away from direct sunlight and moisture. Keep the bottle closed between uses. Do not use past any stated best-before guidance on the pack. If the product is a research peptide vial rather than a capsule bottle, follow the dry-storage and reconstitution notes on that product page instead.
Is Ostarine often a first choice for SARM beginners?
Does Ostarine qualify for subscribe and save or bulk pricing?
Where multi-bottle or bulk tiers are shown on the product page, the unit price drops as you increase quantity - that is the live price you add to cart. Subscription options appear only when configured for that SKU. Always check the buy box on Ostarine for the current offer rather than assuming a sitewide discount code applies.
What should I do if I have a question about my Ostarine order?
Contact APH Science support with your order number and the product name (Ostarine). Typical queries include delivery timing, batch documentation, and stacking advice. Response times are usually within one business day on UK working days.
Where do you ship from?
Orders dispatch from the UK with tracked shipping options. Free UK shipping applies on carts over £100.
How long does delivery take?
Timing depends on the service selected at checkout and courier performance. You will receive tracking when the order leaves the warehouse.
How are orders packed?
Orders are dispatched from the UK with standard e-commerce packing. Tracking is provided so you can follow the parcel in transit.
Is every batch third-party tested?
APH Science targets independent lab verification for research batches before release. Certificate or purity paperwork can be requested where available for your lot.
How do bulk buy discounts work?
Where Buy 1 / Buy 2 / Buy 3 tiers appear on the product, choosing a higher tier applies the stated saving at add-to-cart. The price on the button updates to match the selected tier.
How do I track an order?
Use the Track order page with your order details once you have confirmation and tracking. Contact us if a label has not appeared within the expected dispatch window.
How fast do UK orders ship?
Orders typically leave the UK warehouse within 1–2 working days. Free UK shipping applies over £100. International options depend on destination and product type - checkout shows available rates.
All orders use discreet outer packaging. Tracking is provided once the parcel is with the carrier.
Can I get batch / CoA documentation?
Where certificates of analysis or batch documentation are available for a product, APH Science can supply them on request. Include your order number and product name when contacting support.
Keep screenshots of the product page and your invoice for your own records if your lab requires them.
