08/06/2026
Comment GUIDE and I’ll send you my updated guide on all the things too controversial to share here!
Here’s the difference:
The collagen peptides in your protein powder are exactly what they sound like: they’re building blocks. When you eat them, your digestive system breaks them down into amino acids that your body can use to build proteins like collagen wherever they’re needed. Think of them as delivering a shipment of bricks to a construction site.
GHK-Cu (glycyl-L-histidyl-L-lysine copper), on the other hand, is a naturally occurring signaling peptide. It isn’t there to become collagen. Instead, it acts more like the foreman on the construction site. Research suggests it can signal cells—particularly fibroblasts—to increase collagen and elastin production, support tissue remodeling, and influence wound-healing and repair pathways. In other words, it’s helping direct the work rather than supplying the raw materials.
A simple way to think about it:
🧱 Collagen peptides = the bricks.
👷 GHK-Cu = the foreman telling the crew where and when to build.
Neither is “better” than the other—they simply have different roles. One is a nutritional protein supplement that provides amino acids. The other is a bioactive peptide that appears to influence cellular signaling involved in repair and regeneration.
So yes, Susan… your collagen powder is great. But that doesn’t make it the same thing as GHK-Cu. 😉
