How long should I be using a product before I decide if it's effective or not?
Md Ariful Islam
বিএসসি(সিএসই)
,
এমবিএ(মার্কেটিং)
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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
Several weeks of use can give a facial cleanser a good trial; however, if you develop signs of allergy (increased redness, rash or itching) than discontinue immediately.
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