It depends what you are using it for. The lower concentrates tend to work better IMO for joint and muscle pains..
While the stronger concentrates are better IMO if you are using this for a transdermal
(for anyone who does not know) DMSO actually is a "solvent" This means it dissolves things. So for this reason, it allows anything on your skin to permeate the skin and enter the blood stream. This means if you were looking to introduce a drug, chemical or compound transdermally, you can simply mix it into your dmso and apply to the skin. Various AAS/PH powders can be utilized in this fashion with good success.