Which of the following should be avoided before tanning?

Using harsh products that may irritate the skin should be avoided before tanning because these products can damage the skin's outer layer, making it more sensitive and more susceptible to burns during the tanning process. Irritated skin is less able to handle UV exposure, which increases the risk of adverse reactions, including redness and peeling. Additionally, if the skin is compromised, it can lead to uneven tanning results.

In contrast, applying sunscreen is essential for protecting the skin from harmful UV rays and should be used even when tanning, particularly if one intends to spend extended periods outdoors. Moisturizing the skin helps maintain its hydration and can promote an even tan by preventing dryness and flakiness. Showering before tanning is typically recommended to cleanse the skin of any impurities or products that could interfere with the tanning process and to allow for better absorption of tanning agents.