One compound that has caught attention is GHK-Cu, a naturally occurring copper peptide widely used in skin and hair formulations
Some prefer a quick injection before returning to work, while others choose a more complete IV infusion with hydration and supportive vitamins
This tells you the total capacity and the scale of the markings

For gut healing (IBS, leaky gut, ulcers) Oral protocol (preferred for gut): Dose: 500-1,000mcg daily Method: Oral capsules on empty stomach Duration: 8-12 weeks minimum Timing: 30 minutes before breakfast Injectable protocol (alternative): Dose: 250-500mcg twice daily Method: Injectable SubQ (abdomen area) Duration: 8-12 weeks Works systemically and reaches gut Severe gut issues: Consider both oral AND injectable Oral: 500mcg morning Injectable: 250mcg twice daily Comprehensive approach For joint pain and arthritis Standard protocol: Dose: 250-500mcg twice daily Method: Injectable SubQ near affected joint Duration: 8-16 weeks Long-term use acceptable Multiple joints: Systemic dosing (not near specific joint) 500mcg twice daily Abdomen or thigh injections Reaches all joints systemically For general health and longevity Maintenance protocol: Dose: 250mcg daily Method: Injectable SubQ or oral Duration: Ongoing (can use long-term) Timing: Morning or evening Cycling: Can use continuously or cycle Example: 12 weeks on, 4 weeks off Not required (BPC-157 safe long-term) See best peptides for injury recovery and best peptides for joint pain

The muscle-sparing effects also help maintain lean mass during aggressive cutting phases, making selectivity particularly valuable for achieving very lean physiques
According to the NIH Office of Dietary Supplements, B12 is essential for red blood cell formation, neurological function, and DNA synthesis