tip:
if you sweat heavily during the day (active lifestyle, sporty/athlete or work mostly outdoors),
use stick type antiperspirant (AP), ung solid. the active ingredient used there is zirconium based which is more efficacious or more effective in preventing sweat.
if you work in an air conditioned office and most of the time nakatutok lang sa computer without much physical activity, then use roll-ons. most roll-ons are aluminum chlorohydrate (ACH) based, not as effective compared sa stick type but will suffice if you don't sweat too much.
most of the time, it's the stick type of AP that is the culprit sa stain sa shirts which is very pronounced if your shirt is white as it accumulates through time kung ndi nalalabhan ng maayos.
one thing to consider also is make sure the AP is applied evenly at dry before you wear your shirt. this will minimize the stain sa shirt. use a small amount of vinegar or bleach (provided the shirt is white) sa armpit area ng shirt pag nilalabhan. wag din masyadong patagalin bago ang next na pagpapalaba, para ndi tumigas ng husto sa shirt kung meron mang stain na naiwan.
hope this helps!