Is moisturizer a must use after retinol? Even with oily skin?

And what product do you recommend.

Thank you.

Moisturizer

Hello all, so I started using TO retinol .2% in squalane last November 2020 after 3 months I switched to Cerave resurfacing retinol serum and by next month (May) I’m planning to use the .5% retinol from Th ordinary. Is it a bad idea that I’m using different brand, will it cause purging? need an advice please. Thank you.

Retinol

Does anyone tried using these 2 products on the same routine? I tagged the product I’m planning to use. I would also like to use Niacinamide all at the same time. I have oily/acne-prone skin.

SNAIL ESSENCE & BHA

Best niacinamide brand for oily/acne-prone skin.

I’m planning to use these products but not sure how to layer and when to use them.  I heard some is these can’t be mix together.  

Niacinamide 10%
AHA/BHA
Retinol 0.2%
Vitamin C serum

Need advice.
Thank you.

Actives: How to layer them? (For Oily-acne prone skin)

I heard this product is best for dry skin.

I’ve been using this for over a week now. It actually hydrate my skin like if I apply it on my face at night my skin feel soft the next morning tho I have’t notice if it fades any dark spot it might take awhile but hopefully it will.

Ayieeeeen