I assume you're speaking of Dr. Lees Xandrox 12.5%. His claim is that azelaic acid is a great dht fighter...but it hasn't been proven. I would try 5% first...and if you don't get good results in 6-9 monthes, I'd switch over to the higher dosage. Keep in mind that Xandrox 12.5% is about $90.
minoxidil 5% regrows 50% more hair than minoxidil 2%. if that ratio is maintained, the 12.5% would regrow 50% more hair than the 5%.
At $80 for xandrox 15, you could buy many other topicals that cost much less, like adding green tea extract or apply poly capsules to your minoxidil 5%.
For $80, you could get a liter of linoleic acid and 500mL of alpha linolenic acid.
The azelaic acid does not block DHT production, or at least not enough to affect sebum glands.
The more minoxidil you put on your scalp, the higher your chances of some going systemic.
Any product that contains 12.5% minoxidil MUST OF NECESSITY use a vehicle that is completely and totally different from what either version of Rogaine uses, because even pure propylene glycol dissolves minoxidil to only about 7.5% or so. Therefore, it's pure speculation to wonder which is better. The Rogaine vehicle has been tested up one side and down the other in countless scientific studies over the last 20 years. The product you're talking about almost certainly hasn't been tested at all.
Frankly, I personally would just stick with Rogaine, or its generic equivalent. I take a rather dim view of all that high-potency minoxidil cream-suspension-lotion crappola. I think it's probably just marketing hoopla, and doesn't work one whit better than ordinary Rogaine. And maybe not as well! :wink:
Bolshy, it must be the same place i.e. B -------- Centre. They phoned me because I filled in an enquiry form and said theirs worked well because of the 12.5% with azelaic acid. They said they make it in their pharmacy.