And yes, 100gr of nuts is about 650 of calories, but that doesn't mean the body will actually "access" all those 650 calories.
For example: https://www.sciencedirect.com/science/article/pii/S216183132...
"The metabolizable energy (ME) of nuts was consistently lower than that predicted by Atwater factors for investigated nut types"
"The lower-than-expected ME may explain a lack of association between nut intake and body weight observed in the literature"
A search on google scholar for: peanuts lipid bioaccessibility digestibility
might bring more studies on this topic
And yes, 100gr of nuts is about 650 of calories, but that doesn't mean the body will actually "access" all those 650 calories.
For example: https://www.sciencedirect.com/science/article/pii/S216183132...
"The metabolizable energy (ME) of nuts was consistently lower than that predicted by Atwater factors for investigated nut types"
"The lower-than-expected ME may explain a lack of association between nut intake and body weight observed in the literature"
A search on google scholar for: peanuts lipid bioaccessibility digestibility
might bring more studies on this topic