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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
The current recommendation is that you should reapply sunscreen every 2 hours, regardless of the SPF you're using. Remember, it takes about 20 minutes for sunscreen to absorb into the skin, so put it on a little bit before you plan on going into the sun or in the tanning bed.
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