Now I don't know how accurate this is but I found the newspaper articlethe regrown finger tipl, and it gives instructions on how to make the powder. I have typed them below as they appear in the article. Please bear in mind though, that fingertips can sometimes grow back on their own, but this is uncommon and usually only occurs with children (in other words, do not cut your childs or your own fingertip off to try this out

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1. start to make the "pixie dust" by cutting open a pigs bladder and flattening it out.
2.Scrape away the layer of muscle before "cleaning" the remaining collagen rich tissue by shaking it in acid (I presume by acid they mean tca as I have heard this mentioned as being part of the acell forumla, but I am not 100% sure, neither does it say the amount or strength, I think Dr Picart on the other forum said it was a strong tca acid)
3. Dry out the paper like "extra cellular matrix" and grind into powder form
4. Regularly sprinkle powder on severed finger tip
5. Withiin a few weeks, tip grows to normal length, complete with nail and "fingerprint"
Obviously the above instructions refer to a finger tip and not stretch marks. But I just thought I would post it on here in case there is anyone brave enough to give it a try and perhaps let us know how they get on..Kojiro? Nothing to lose by trying the method and if it did work on striae, we could all produce our own en mass. Obviously either needling or abrasion would have to be used to help it reach the dermis, perhaps also encorporating emu oil as the carrier.
J