Link?

From there site: https://ensure.com/nutrition-facts-questions-answers

"Can Ensure products be used as a meal replacement or a snack? Yes, Ensure ready-to-drink shakes and drinks can be used as a snack and as an occasional meal replacement."

The fact they don't market themselves to the general public as a complete meal replacement just means they're a) aware that they're operating in a litigious market segment and b) not fucking arseholes who recognise that they have a duty of care to people who use their products.

It's telling that Soylent kickstarted with a bunch of bullshit medical claims, and that while they've dropped those claims they continue to make borderline dishonest claims.

Ensure is used as a total meal replacement for people with severe illness and for people being fed through a naso-gastric tube (sometimes against their will).

But if you're a doctor you probably one of the other Abbott brands, which have licencing and testing to support them.

http://abbottnutrition.com/brands/abbott-brands

EG: http://abbottnutrition.com/brands/products/ensure-plus-thera...

> For interim sole-source nutrition.

Jevity one of the abbot brands you mention is clearly designed for long term use as 'sole-source nutrition'. And, I am sure someone has lived off of Ensure, but just because they also sell total nutrition products does not mean Ensure was designed for that role.

Design goals matter, Jevity/Oxepa/etc being designed for feeding tube use has little focus on taste.

Another example, Osmolite is sole-source nutrition but it's low-residue which is not good for healthy people who need more fiber.

PS: You can look through there brands, but there is a reason they sell so many different kinds as they each have different trade offs.

ED: I have had significant digestive issues in the past so I have done some research into this. And, talk to a nutritionist before going on any unusual diet, it's easy to mess things up long term.