Pen users - what length needle?

[BigDeee]

I ordered 4mm length and they seem to leak hgh after injection, even if I hold it in for 15 seconds. I'll try some 8mm to see if needles are just too short. Wondering if anybody else has run into this with these pens.

 

[bigforyouben]

I've been using 4mm for a couple weeks and I've had similar issues, especially in saggy skin (I've lost 70 pounds so my belly is all folds). 8mm seems to work better.

 

[MadaFacor]

29 gauge 1/2 inch is biggest I have found and should give you plenty of penetration. BD Ultra-Fine 29G (0.33mm) 1/2in (12.7mm) U100 Original Pen Needles