In my experience, the most effective hair supplements for promoting hair growth and thickness include biotin, collagen, and keratin-based supplements. I’ve noticed significant improvements in the strength and texture of my hair since incorporating these into my daily routine. Additionally, fish oil or omega-3 supplements have also contributed to overall hair health. However, it’s essential to consult with a healthcare professional before starting any new supplement regimen to ensure it’s suitable for individual needs. I found Raw Science products, what do you think of them?