Macauluy Culkin
Macauluy Culkin voted up Tom Jackson's answer

Good question.

Hard question to answer absolutely.

There is a temperature range through which foods can be allowed to stay at for a limited amount of time---and then you can have a real problem with bacteria multiplication and potential food poisoning.

Here is one site that states unequivocally that all marinating must be done in the refrigerator.

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Macauluy Culkin
Macauluy Culkin voted up PJ Stein's answer

It really depends on your hair type. When I was younger my hair was so oily I washed it daily and never used a conditioner and it was perfectly healthy hair. Sweat has a high salt content that can be drying for hair. If you already have dry hair shampooing too often can make it … Read more

Macauluy Culkin
Macauluy Culkin thanked PJ Stein's answer

It really depends on your hair type. When I was younger my hair was so oily I washed it daily and never used a conditioner and it was perfectly healthy hair. Sweat has a high salt content that can be drying for hair. If you already have dry hair shampooing too often can make it … Read more