I'm currently using Brazillian Keratin oil from Natural World to help bring some life back to my curls. Personally I've seen a significant improvement in the volume, frizz control, and even the shine present in my hair.
2. Don't over shampoo.
It took me a while to come to terms with this one. I grew up being told that you should wash your hair daily with both shampoo and conditioner. My mother and sister both have straight hair, and so it was their understanding that shampoo was the key. However, for curls, it might just be the opposite.
Unlike straight hair, curly hair doesn't need to be shampooed on a daily basis. In fact, too much shampoo can stress fragile hairs and leave them dried out and dull. Instead, we should be focusing on conditioner and this is something I've been doing on a regular basis since moving out. I shower every day, but only shampoo my hair twice a week as opposed to conditioning which I do once daily.
3. NEVER brush!
Maybe I'm preaching to the choir here but please don't brush your curls. This leaves them uncontrollably frizzy and can even aid in breaking fragile hairs. Stick to combing with a wide-toothed comb or 'rake.'
4. Avoid overheating your hair.
I NEVER heat treat my hair in that I haven't straightened it with a flat iron since I was about sixteen. It's a well know fact that overuse of straighteners and these sorts of products can cause significant damage to your hair. Especially if you're not using heat resistant sprays and treatments. Use COVID as a chance to give your hair a break. Avoid the heat treatment and let it breathe in it's natural, curly state.
5. Not all curls are the same!
What works for me and my hair may not work for yours. Experimenting and trying out different treatments and products is the key. Not all curls are the same so please be mindful.