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Research-driven reviews, dosing protocols and safety guides for the UK and US performance community. No fluff — just the science.

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RAD-140 (Testolone) Review
Dosage, results, cycle guide — Updated 2026
Research Only
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BPC-157 Peptide Protocol
Injury healing, gut health & dosing
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Best Nootropics Stack 2026
Cognitive performance & focus stacks
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MK-677 vs HGH — Full Guide
Growth hormone secretagogue comparison
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Research Compound Guides

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Everything you need to make informed decisions about performance compounds — researched and written for serious athletes.

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SARMs
RAD-140, LGD-4033, Ostarine, S4 and more — full reviews, cycles and PCT guides.
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Peptides
BPC-157, TB-500, GHK-Cu, CJC-1295 — protocols, benefits and stacking guides.
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Nootropics
Cognitive enhancers, focus stacks, memory boosters — what works and what doesn't.
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PCT & Recovery
Post-cycle therapy, bloodwork guides, hormone recovery — stay safe after a cycle.
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Latest Research

Featured Articles

Our most-read guides — fully updated for 2026 with the latest research and user data.

RAD-140 Testolone Research Guide
SARMs
Tom8 min readUpdated 2026
RAD-140 Review: Dosage, Results & Where to Buy in the UK & USA
The most comprehensive RAD-140 guide online — covering dosage, cycle length, expected gains and verified sources.
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Ipamorelin Peptide Research Guide
Peptides
Tom8 min readUpdated 2026
Ipamorelin Nasal Spray: Muscle Growth Peptide Guide for UK & USA 2026
Ipamorelin is one of the most researched GH-releasing peptides — here's what the research says about dosing, timing and sourcing.
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MK-677 Ibutamoren Research Guide
MK-677
Tom10 min readUpdated 2026
MK-677 (Ibutamoren): Long-Term Boost for Strength & Recovery — 2026 Guide
MK-677 is the GH secretagogue with the longest research track record — we break down dosing, sleep benefits and the best sources.
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Tom's Fitness Blog exists because the information online about SARMs, peptides and nootropics is either dangerously wrong or trying to sell you something. We do things differently.

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All affiliate links clearly disclosed — we only recommend what we'd use ourselves

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Compounds reviewed against latest PubMed research, not just anecdotes

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⚠ Research Purposes Only Disclaimer: All compounds discussed on Tom's Fitness Blog — including SARMs, peptides, nootropics and related substances — are discussed strictly for research and educational purposes only. These are research chemicals and are not approved for human consumption by the FDA (USA), MHRA (UK) or any other regulatory body. Nothing on this site constitutes medical advice, and we do not encourage or condone the use of these compounds for human consumption. Always consult a licensed medical professional before considering any research chemical. Some links on this site are affiliate links — we may earn a commission at no extra cost to you. Full affiliate disclosure available on request.