safe as in "you are not going to die tomorrow", probably yes. safe as in "healthy for your long-term health", definitively no.

We already made this mistake in the past. After the discovery of the macros (protein, carbs and fats) some people thought that those were enough to keep you alive and healthy. They then produced some infant formulas and some kids died.

Now we also know the existence of some micro nutrients (vits, minerals, etc) and we are stupid enough to think the same.

Is coffee just caffeine ? A coffee bean contains more than one thousand active compounds.

Soylent is to real food what caffeine is to coffee

edit:typo