First..here's Lipoxidil's info page on the dermarolller: http://www.lipoxidil.com/site/derma.php
I think this is the one that is supposed to last a long time..and I would hope so considering the cost: http://dermalintegrity.editnew.com/temp ... ?pageid=28
With that Hair Matrix topical: http://www.hairreturn.com/technology.html
And I don't want to get off topic here about this topical..but will post the ingreds so we get that out of the way.
Bunch of cheaper ones: http://www.dermarollers.us/De-ionized Water, Algae Extract, Phenoxyethanol, Propylene Glycol, Glycerin, Margosa, Hydrolysate of Milk Protein, Solanum Tuberosum Extract, Silanediol Salicylate, Butylene Glycol, Triethanolamine, Sulphured Amino Acid, Sulfomucopolysaccharide Extract, Celastrus Paniculata Extract, Colloidal Sulphur, Spondios Amara Extract, Rubus Bramble Berries, Trichomonus Japonicum Maxim, Chinese Wormwood Extract, Homotaurine, Maiden Hair Fern Extract, Henna Extract, Barosma Betulina, Sodium Benzoate, Potassium Sorbate, Polypeptide (Leucine, Proline, Lysine, Glutamine, Aspartic Acid, Metionin, Alanine).
The "stamp" may actually be better for hairy areas...Hmmmmm.. http://www.dermarollers.com/hair.html Here's more on the "stamp" http://www.dermarollers.com/stamp.html Wish it came in other needle lengths.
Good info page: http://www.dermaroller.de/en/welcome-to ... oller.html