You are never too old to get braces or any other dental procedure that you desire! I did a complete oral rehabilitation on a 78 year old patient (crowns and bridges), and you would not believe how happy he was with his new and beautiful smile. He no longer had to wear dentures and could smile and eat with confidence. Age is not a determinant in what type of dental care you receive, however your overall health does matter. If you are a healthy 49 years old, and I consider that young, just do it. Probably, the most limiting factor is your periodontal health, which can be ascertained by your general dentist. My recommendation for braces for most adults is Invisalign or something similar. Seek out an experienced Invisalign general dentist or orthodontist for a consultation. Go for it!