Keeping Hair Healthy

I wouldn't say my hair is in bad condition because it's not. I rarely get split ends however I colour my hair regularly (the same colour) usually just the roots. I wondered if any girls out there could suggest any products they find helps replenish their hair and maintain health & good condition. My hair is wavy and is long, whenever I let my hair dry naturally it goes wavy but then has a layer of frizz over it too 😒 I've tried so many products to stop this from happening but I think it could be because my hair is so thick? Please help if this has happened to you! I need tips on preventing this x