Moisturizer is essential for any skin type (even oily skin!). Leaving the house without moisturizer is like walking outside without a coat on a cold, windy day. Your skin will be exposed to damage without any kind of protection. On the other hand, going to bed without applying moisturizer forces your skin to work overtime to stay hydrated and you don't take advantage of the regenerative potential that your skin has during the night.
Ideally, you should use a daytime moisturizer and a nighttime moisturizer, as everyone's skin needs are different. However, you can choose a more general moisturizer that is suited to your skin type and can be used in the morning and at bedtime.
If you choose to differentiate:
🌄 Morning: You can opt for a moisturizer that also has sun protection, thus saving yourself an extra step in the morning (Dermalogica sunscreens are great for this purpose), just make sure you use an adequate amount. Alternatively, you can prefer to use a basic moisturizer, suitable for your skin type, and apply sunscreen afterwards.
🌌 Night: During the night, the skin regenerates itself and goes through a self-cleansing process. Moisturizers formulated specifically for night use have active ingredients that help the skin in this regeneration and recovery process.
If you prefer to use just one moisturizer at both times:
🌄🌌 Morning and Night: Opt for a simple moisturizer, suitable for your skin type, without sunscreen or active ingredients for night use (for example, retinol and its derivatives should only be used at night).