Red Seal Cosmetology Practice Exam

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What does efficacy refer to?

  1. The cost-effectiveness of a product

  2. The side effects of a medication

  3. The ability to produce an effect

  4. The difficulty of a treatment

The correct answer is: The ability to produce an effect

Efficacy refers to the ability of a product to produce the desired effect. The other options are incorrect because they do not accurately define efficacy. Option A refers to cost-effectiveness, which is the extent to which a product is worth the cost. Option B refers to side effects, which are unintended and sometimes undesired outcomes of using a medication. Option D refers to difficulty, which is not necessarily related to the effectiveness of a treatment.

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