How price per milligram is calculated
Every pack in the comparison holds 60 capsules, so the total content is the label strength multiplied by 60, and the price per milligram is the pack price divided by that total. A label strength is the brand's declaration, which only a batch certificate with a measured content line confirms, and prices are those shown on 9 October 2026.
Compounds stocked from more than one brand
Where two or more of the four brands sell the same compound, the figures can be set side by side.
Compounds stocked from one brand only
Multi-compound listings are left out of both tables: Thoroughbred Labs' two Research Systems, Yakka Strength's combined MK-677 and RAD-140 pot and its five bundles, and iMuscle's eight multi-compound packs. A single price per milligram would mix different compounds, so price each component from the tables above instead.
Certificates of analysis, brand by brand
This is where the four brands differ most. The store rule is the same for all of them: for a third-party brand, a certificate of analysis is shown on a listing only where the brand has supplied one for the batch Free Muscle holds. Where none is shown, none has been supplied, and no generic document is put up in its place. By contrast, every Free Muscle-brand batch is assayed by Janoshik Analytical, an independent laboratory, and the certificate for the batch number on the pack is sent on request.
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Thoroughbred Labs publishes a Certificates of Analysis page on its own website. On 2 October 2026 it listed twenty-two vial entries and three capsule entries, each with a batch number: BPC157 Capsules (batch 0526BP), SLU-PP-332 Capsules (batch 0725SLU) and a heavy-metals analysis for MK677 Capsules (batch 0126MK). No capsule report was listed for RAD140, GW501516, TB500 or 5-AMINO-1MQ.
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Yakka Strength does not publish batch certificates. On 2 and 3 October 2026 we read the brand's home page, its research collection, all eleven research product pages and its About, FAQ and terms pages: none mentions laboratory testing, certificates of analysis, purity figures or a named laboratory.
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BioLab says it commissions content tests from independent laboratories and keeps more than 500 laboratory reports. Two of our four BioLab listings show one: BPC-157 HCl 200 mcg (a 2022 report) and Metabolic Boost 100 mcg (a 2024 report). Both used HPLC and identify the sample by the laboratory's order number and a photograph of the tub rather than a batch number, and neither states a purity figure. The 200 mcg and 500 mcg Metabolic Boost listings carry no BioLab report.
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iMuscle states that it has every lot tested at an independent European laboratory and that incoming raw material must reach at least 97% purity. Eight of its nine single listings show two documents in their galleries, a Bulgarian-language test protocol from a laboratory in Sofia that names iMuscle LTD. and an HPLC print-out with a lot number. All date from 2021 and the protocols carry no lot number, so they record earlier tests rather than the pots in stock. The Cardarine single and the eight packs show no document.
See also how to read a certificate of analysis and the lab tests page. Compound pages, all brands side by side: MK-677, RAD-140, Cardarine, BPC-157, TB-500, SLU-PP-332, Enclomiphene, YK-11.
Research compounds sold by Free Muscle are supplied for laboratory research use only and are not for human consumption. They are not authorised as medicines by the MHRA, EMA or FDA, are not food supplements, and are sold only to adults aged 18 or over.
Frequently asked questions
Which Muscle Market brand is cheapest per milligram?
It depends on the compound. For MK-677, RAD-140 and Cardarine, Thoroughbred Labs has the lowest price per milligram of the four brands; for BPC-157 capsules, Thoroughbred Labs is lowest and BioLab highest.
Which brands publish batch certificates of analysis?
Thoroughbred Labs publishes a certificates page that listed three capsule batches on 2 October 2026, one of them a heavy-metals screen only. iMuscle shows 2021 test documents on eight of its nine single listings. BioLab shows HPLC content reports without batch numbers or purity figures on two of four listings. Yakka Strength publishes none. Free Muscle-brand batches are each assayed by Janoshik Analytical.
Does a higher strength per capsule mean a better product?
No. Strength is a label declaration used for laboratory selection and for calculating price per milligram. Only a batch certificate with a measured content line confirms it, and this article makes no judgement about what any compound does.
Why are bundles not given a price per milligram?
Because a bundle or combined pot holds two or three compounds, often at different strengths, so a single figure would mix unlike quantities. Price each component from the single-compound tables and add them.
Are the prices in this article current?
They were read from the store on 9 October 2026 and may change. The product page is the authority at the time of ordering.
Are these products for human use?
No. They are supplied for laboratory research use only, are not for human consumption, and are sold only to adults aged 18 or over.
Sources
- Free Muscle brand collection pages, read on 9 October 2026: Thoroughbred Labs, Yakka Strength, BioLab, iMuscle, Free Muscle, and the product listings within them.
- Free Muscle lab tests page.
Notice. Published by Free Muscle, which sells all of the products compared. Prices and certificate availability were read on 9 October 2026 and may change.
