Many products that said to be stop baldness actually didn't work out. Male pattern baldness is due to DHT , I can not see any topical treatment including minoxidial actually works.
Here are some details I get from Alpecin official website. Although it claims to have no sides effect like Propecia, but the effects is under doubt.
First of all: hereditary hair loss is a genetic predisposition, not a disease. As such, it cannot be permanently cured but must be continuously treated. This is where Alpecin has proved valuable. The caffeine contained in Alpecin prevents the hair roots from following their hereditary propensity for increased hair loss and ensuing baldness.
Alpecin prevents hair loss – without any undesirable side effects.
When applied, it causes a fresh tingling on the scalp, its active ingredients travel along the hair sheath and form a depot sufficient for up to 24 hours.
Every morning, it will take just a small effort to ensure that the caffeine-based ingredient combination protects you from hair loss.
“Hair loss treatment must be performed early, regularly and over a longer time period, if it is to be successful.“
Dr. A. Klenk
Head of Dr. Kurt Wolff-Research
With its caffeine-based ingredient combination, Alpecin keeps the hair roots active and helps extend their growth phase longer than genetically predisposed:
The active ingredients are applied directly where they are needed. This way, Alpecin allows a high dosage without stressful impacts on the organism.
Alpecin is available at drugstores, pharmacies and hair salons.
However, please try to play their baldness calculator. It test how old you will be bald. Apparently, I will be bald at 38 according to the test.