Hi,I am currently regrowing my eyebrows after years of over plucking 🙈. I have been going to see a HD brow professional since the new year and they are growing back....slowly! But I do still have a few gaps. So my question is has anyone used any product,successfully to help the hair grow back? The HD lady did mention castor oil? I didn't want to waste my money on loads of products that don't work. Thanks in advance 😀