My hairline is receding I'm just 21? Is it receding or maturing? (photo)

If you believe you have hair loss and would like treatment options, it would be best to see a doctor for an examination.

Keep in mind that hair loss is progressive. It is important to get on a preventative regimen. You should switch to an organic shampoo. You can also consider a natural DHT blocker like Saw Palmetto. There are also medications like Finasteride (a DHT Blocker) and Minoxidil (Rogaine) that can be very helpful in maintaining you existing hair, helping to prevent future loss and even regrow some hair. Before taking any medications you should discuss this with your general physician.

I would tend to look at your family and see if it is similar.  If not then evaluate and treat to prevent what you perceive earlier rather than later.  I use the SmartGraft system for Hair Transplant.  I treated a 21 year this week with a history similar to yours.