They are comparing roman concrete to portland cement, the most common formula. The kind of strength being emphasized is durability, because roman concrete has unique chemistry that allows small cracks to fill themselves. Modern special-purpose concrete blends can outperform roman concrete in other measures of strength, however.

The things i’ve been reading/listenig too is that we should be replacing simple carbs with paani protiens and fiber. In every case, the people mention that American diets should reduce intake over all and macros is secondary