Sous vide retains more nutrients and vitamins than other methods of cooking. Exposure to heat, water, and oxygen are the things that typically destabilize all of those wonderful nutrients when we're cooking, whether by charring meat to over-carbonization or leaching vitamins into water while boiling.
Why sous vide is bad?
Sous vide cooking isn't always perfect, and it isn't for every cook. Digital Trends mentions some of the common pitfalls: sous vide can render meat fat rubbery, punctured pouches can be a big problem, and sous vide cooking is undoubtedly slow... and yes, it is still possible for sous vide food to come out overdone.
Is sous vide safe and healthy?
After reviewing the considerable amount of research that's been done, we believe the answer is: It's safe. Although some types of plastic have been found to release undesirable chemicals into food, especially under high heat or acidic conditions, the bags that we use for sous vide cooking are not among those plastics.