I'm sorry to hear that your hair is feeling very dry. To determine if a particular serum suits your hair, it's important to consider the serum's ingredients and your hair type. Generally, serums with nourishing oils like argan oil, coconut oil, or almond oil can help moisturize dry hair. Avoid serums with heavy silicones if your hair tends to get greasy easily.

Here are some simple tips to manage dry hair:

• Use a hydrating serum or oil after washing your hair, focusing on the ends.
• Avoid excessive heat styling and harsh chemical treatments.
• Use a mild, moisturizing shampoo and conditioner suitable for dry hair.
• Consider natural oils like coconut or almond oil as part of your hair care routine.

If you can share the name or ingredients of the serum, I can provide more specific advice. For persistent dryness or scalp issues, I recommend consulting a dermatologist or trichologist (hair specialist) who can assess your hair condition and suggest the best treatment.