What to avoid.
Peptides interact with common medications — blood thinners, insulin, blood-pressure drugs among them. Pick a peptide to see what it clashes with, filtered by severity.
Tesamorelin worsens insulin sensitivity; glycaemic control may need adjusting.
Blunt the GH response and add their own metabolic burden.
Same receptor. Stacking adds risk, not effect.
Directly opposing mechanisms — do not combine without specialist advice.
Blunt the immune effect this peptide is taken for.
Ascorbic acid reduces the copper and inactivates the complex. Apply at different times of day.
Zinc and copper compete for absorption; high-dose zinc can deplete copper.
Commonly layered, but combined irritation is the usual reason people abandon both.
Theoretical synergy via NO modulation — monitor.
Mechanistic opposition; avoid combination.
Both activate AMPK — stacking effect unclear.
Potential additive glucose-lowering.
Additive effects on pineal signaling.
Mechanistic overlap; effect unclear.
GH antagonizes insulin; monitor glucose.
Blunt GH response.
Synergistic GH release.
Antagonistic — avoid combination.
Mechanistic overlap with c-Met signaling.
Often stacked; interactions not characterized.
Theoretical effect on tissue remodeling — caution.
Frequently co-stacked; no formal interaction studies.
Mechanistically distinct but caution if combined.
Risk of hypoglycemia — dose reduction usually required.
Delayed gastric emptying may alter absorption; separate timing for narrow-therapeutic-index drugs.