Is it necessary to drink collagen products after Ultherapy surgery?

Ultherapy is a non-surgical procedure to stimulate collagen production, lift, tone, and tighten tissue. Each individual stimulates and breaks down collagen at different rates. We often combine the treatment with other collagen stimulating treatments such as lasers, microneedling, Sculptra, etc. Oral collagen products are not going to have much of an effect on results. Hope this helps.

Your skin produces new collagen and elastin in response to the heat from Ultherapy treatments. Drinking or eating collagen products afterward isn’t necessary and wouldn’t affect your results either way. The amount of collagen that your body actually absorbs through collagen drinks and other collagen products appears to be minimal and wouldn’t cause hyperplasia. Be sure to consult a board-certified dermatologist who is an expert at tightening skin with Ultherapy.

nothing ingested helps ultherapy but it is best to do fractora or MNRF with it to get even more results. 
Options include for skin tightening :
thermage radiofrequency to heat skin and tighten it over time and prevent the aging process
ultherapy highintensity ultrasound to contract muscle and tighten the face and neck and prevent the aging process
PDO nova threads or instalift threads for immediate lifting without surgery and long term collagen production
sculptra injections for collagen production to areas of the face and neck with crepe skin or early sagging
btl exilis ultra, venus legacy, and thermi250 for constant collagen stimulation monthly with facials
facelift/necklift with fat grafting/fillers if you need a big improvement
ThermiRF or J plasma or Inmodebodytite  internal heating and tightening to long term internal heating and tighting with or without surgery
Platysmaplasty to tighten the muscles of the neck long term and create contour
Facial implants or fillers to contour the jawline and chin to improve the apperance of the nec
Best, Dr. Emer.

Ultherapy works via two mechanisms.Immediate tissue tightening occurs by contraction of the dermis and fascia.Six + months of collagen production via stimulation of our fibroblast cells. It is not common for someone to be protein deficient so most people will have a satisfactory collagen production, but some people are deficient in dietary protein consumption or have digestive abnormalities preventing them from processing the foods they eat well and in these cases there may be less of beneficial result from Ultherapy theoretically. Another possibility of a dietary cause for a lack of successfulness from Ultherapy is vitamin C deficiency. Vitamin C is a required item needed for protein synthesis in our bodies. Scurvy is rare these days but it does exist. If you think your diet is deficient in protein or vitamin C, then speak with your physician or see a nutritionist to explore this possibility. The information provided in Dr. Shelton's answer is for educational purposes only and is not intended to constitute medical advice.  The information provided should not be relied upon as a substitute for consultations with a qualified health professional who may be familiar with your individual medical needs.