The way we calculate calories is one thing, but we need to take into consideration whether the frigging body is digesting/converting/absorbing all those calories.
The 300 calories from veggies is probably never converted and used as a full 300 calories.
300 calories from simple sugars or other refined foods is probably being fully absorbed and used completely, fast and, to make matters worse, drops you on your ass when your sugar and/or insulin levels are thrown off track, which compounds the issue.
Foraging brings in a bunch of raw things that – without a doubt to me – don’t provide all the calories for which groups such as the FDA would calculate. Yeah, they estimate the gorillas boosted their caloric intake, but I say the full caloric potential of raw foods is much lower than any USDA rating.
Oh, this heaping of raw spinach is rated at 150 calories? Oh, this small candy bar is rated at 150 calories? I doubt our bodies, and the gorillas’ bodies, are getting what the FDA says we are out of both.