Although vocal fry is becoming more present, it is still considered a misuse of the voice. More research has to be done on the long term affects of vocal fry use. "Future knowledge of the extent of vocal fry usage in college students may have very important long-term consequences for vocal health. Researchers need to consider the long-term consequences of the prolonged use of vocal fry in SAE speakers, its possible contribution to voice misuse, and its implications for vocal hygiene. Colton et al37acknowledge glottal fry as normal mode of vibration but note that the habitual use of fry is atypical and possibly a form of vocal abuse. There are two reasons why vocal fry is referred to above as “misuse” and should be considered by the clinician as a potential hazard to voice health.37(p81) First, because it is difficult to produce glottal fry with sufficient loudness volume, a person may be likely to show increased tension of the vocal mechanism when attempting to increase loudness. Second, individuals who use glottal fry are reported to experience vocal fatigue.37 Much future research is needed to understand the degree to which each one of these variables may contribute to vocal health."
1-s2.0-S0892199711000701-main.pdf