The bursa is a small fluid-filled sac that helps to reduce friction and cushion the area between bones, tendons, and muscles
These pathways not only meet the energetic demands of immune activation and inflammation but also shape long-term gene expression through epigenetic mechanisms

Common side effects (affect 10-30% of users): Growth hormone-related peptides (CJC-1295, Ipamorelin, etc.): Water retention (mild, temporary) Joint pain (usually temporary adaptation) Carpal tunnel-like symptoms (rare) Numbness/tingling in extremities (rare) Increased hunger (GHRP-6, GHRP-2) Lethargy initially (body adjusting) Healing peptides (BPC-157, TB-500): Headaches (occasional, mild) Nausea (rare) Dizziness (rare) Increased body hair growth (TB-500) Injection-related: Site reactions (redness, minor pain) Bruising (improper technique) Infection risk (if sterility not maintained) Rare but possible: Blood sugar changes (monitor if diabetic) Prolactin increase (with some GH peptides) Tachyphylaxis (reduced effectiveness over time with some peptides) What's notably absent: No testosterone suppression No cardiovascular remodeling No liver stress No hormonal disaster No PCT required No infertility issues Long-term safety: Growth hormone peptides mimic natural pulses (safer than exogenous GH) Healing peptides have excellent long-term safety profiles No evidence of organ damage with proper use Can be used for extended periods Head-to-head safety comparison Hormonal disruption: Steroids: 10/10 severity (guaranteed shutdown) Peptides: 1/10 severity (minimal hormonal impact) Cardiovascular risk: Steroids: 8/10 severity (significant risk increase) Peptides: 2/10 severity (minimal concerns) Liver toxicity: Steroids: 7/10 severity (oral steroids especially) Peptides: 0/10 severity (no liver impact) Reversibility of side effects: Steroids: 5/10 (some permanent damage possible) Peptides: 9/10 (almost everything reverses) Need for ancillary drugs: Steroids: Extensive (AI, SERM, hCG, PCT drugs, BP meds) Peptides: Minimal (maybe vitamin B6 for prolactin if needed) The safety profile of peptides is vastly superior

Biol Psychiatry (2015) 78:e79
Although meat and seafood contain high levels of selenium, nuts and grains are also a good source of it [211]