What would be a good solution to a platysma band becoming visible in a 35 year old? (photo)

I would suggest Ultherapy the non invasive ultrasound treatment to tighten, tone and reduce the fat volume in your neck.  This may then either eliminate the need for Botox for the Platysma band or reduce the amount of units needed.  Ultherapy treatments last up to 3 years versus 3 months for Botox.

I would consider the use of Botox or Dysport. I would also consider liposuction under the neck through a small incision if you are concerned about the fatty tissue.  Alternatively you can consider Ulthera under the neck to tighten the neck tissue