Dexterz Labs · Research Series In stock

Andarine S4 25mg 90 Capsules

25mg · 90 caps

£54.99£84.99Save 35%61p per capsule
4.958 reviews Rated 4.9 out of 5 from 58 reviews

Multibuy saving applies across any products in your basket. Add a second bottle and pay £52.24 each.

Order by 2pm Mon to Fri for same day dispatch Secure checkout
  • Visa
  • Mastercard
  • American Express
  • Klarna
  • Bitcoin
  • Ethereum
  • Litecoin
Batch testedCertificate for every batch
Free UK trackedOn orders over £60
Discreet packagingPlain outer, no product names
30-day returnsSealed and unopened
4.9from 58 verified reviews
from 58 reviews
UKUK based supplier
Encapsulated and dispatched from our UK warehouse
UK supplier
About Andarine S4 25mg 90 Capsules

About Andarine S4 25mg 90 Capsules

Andarine, coded S-4 and also written GTx-007, is one of the earliest non steroidal selective androgen receptor modulators to be characterised in detail, developed at the University of Tennessee and by GTx. This bottle contains 90 capsules at 25mg of andarine per capsule, made in the United Kingdom. Supplied strictly as laboratory research material and not for human consumption.

Read the full research summaryHide the research summary

What the research says about andarine

Andarine is a foundational compound in the SARM literature. Gao, Dalton and colleagues, publishing in Endocrinology in 2005, reported that S-4 restored levator ani muscle mass and bone strength in castrated rats to intact levels while producing only partial stimulation of the prostate, which demonstrated tissue selectivity in a way that had not been shown clearly before. Kearbey and colleagues followed in Pharmaceutical Research in 2007, reporting that S-4 prevented bone loss and preserved bone mineral density in ovariectomised rats, a model used for postmenopausal osteoporosis.

Those two lines of work, muscle and bone in rodent models, are the substance of the andarine evidence base. The compound was not carried into late stage human trials, and there is no published phase II or phase III efficacy study in people. Pharmacokinetic work describes a short half life of roughly four to six hours, which is why study protocols in the literature used divided daily administration rather than the once daily schedule seen with LGD-4033 or MK-677.

The effect that distinguishes andarine in the anecdotal record, transient visual disturbance and a yellow tint to vision, is not described in the rodent papers and has not been the subject of a controlled trial. The proposed explanation is an interaction with retinal photoreceptor function, and the reports describe it as reversible on stopping, but it should be treated as an unverified observation rather than an established pharmacological finding.

Read the guide

Lab testing

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.

Printed on the label under the product name.
Specification
Product Andarine (S-4, S4, GTx-007)
CAS number 401900-40-1
Form Oral capsule
Strength per capsule 25mg
Capsules per bottle 90
Manufactured United Kingdom
Testing Every batch independently tested; certificate of analysis published on this page and the Lab Testing page
Storage Cool, dry place below 25C, sealed, away from direct sunlight
Research use only Yes. Not for human consumption
Delivery and returns

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.

Questions

Is andarine legal in the UK in 2026? SARMs are not controlled substances under the Misuse of Drugs Act 1971, so buying and possessing andarine as a research chemical is lawful in the United Kingdom in 2026. What is not lawful is selling or advertising it for human use, because the MHRA treats it as an unlicensed medicine in that context. That is why this listing, and every listing on this site, is worded for laboratory research and nothing else.

How fast is delivery? Orders placed before the daily cut off are despatched the same working day by tracked delivery, with UK orders usually arriving within two to three working days and a next day upgrade available at checkout. Everything leaves in plain outer packaging with no reference to the contents or to the compound on the outside of the parcel. International delivery is available to most countries, although some destinations are restricted because of local customs rules, and restricted countries are listed at checkout.

How should the capsules be stored? Store sealed, below 25C, in a dry place away from sunlight and heat. Under those conditions the material is stable to the expiry date shown on the bottle. Humidity is the usual problem with capsules, so a cupboard is better than a windowsill or a bathroom shelf.

Is andarine banned in sport? Yes. Andarine is prohibited at all times under section S1.2 of the WADA prohibited list. It was among the first SARMs for which anti doping laboratories validated a detection method, and it appears regularly in adverse analytical findings, frequently traced to contaminated supplements.

How does andarine differ from ostarine? Both came out of the same research programme and both are non steroidal androgen receptor ligands, but ostarine progressed into phase II and phase III human trials while andarine stopped at preclinical work. Andarine also has a much shorter half life and is supplied at a higher milligram strength for that reason. The reported visual effect has no analogue in the ostarine literature.

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.

Most bought together.

Add all four and save 10%

What customers most often add alongside this, plus PCT. Three items takes 10% off everything.

Reviews

4.9 from 58 · Powered by Okendo

average rating 4.9 out of 5
Based on 58 reviews
  • 5 Stars
    50 Reviews
  • 4 Stars
    8 Reviews
  • 3 Stars
    0 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
100% of reviewers would recommend this product to a friend
58 Reviews
Reviewed by Brian W.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

All good.

All good.spot on.

Loading...
Was this helpful?
Reviewed by Matthew J.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Will be using this stack again

Excellent stack for HIRT training

Loading...
Was this helpful?
Reviewed by Mikael C.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Andarine S4 25 mg

C est efficace a 100% !

Loading...
Was this helpful?
Reviewed by Vasco P.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Good product

I’m currently on my third SARMS cycle and have been cycling this combo for three weeks now. I’ve added 10mg Cardarine and 10mg Andarine per day to my regimen and the results have been amazing so far. I feel great and have noticed only a little acne on my back and shoulders as secondary effects. Some guys at the gym have started asking me what I’m taking because I’m growing bigger and stronger every day.

Loading...
Was this helpful?
Reviewed by Alan C.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

A lot more user friendly than liquid

I’ve used liquid sarms before this is my first time using capsules so far so good being over sixty so I didn’t won’t to use oral steroids .

Loading...
Was this helpful?