Test one thing at a time. It feels slower and it is the only way to learn anything.

The sticker on the box is just so you know they were in there. It is the letter that matters.

Read methods. Not on GHK-Cu but the pattern is familiar.

It gets smaller. Not easy, smaller. That distinction kept me going.

This is the correct amount of effort for a thread like this. Currently on a long-term dependence myself.