Portion analysis
Serving total and calorie density answer different questions
The listed source amounts run from 135 to 180 grams—a 45-gram gap before composition enters the comparison. Their own source servings run from 311 calories for “Egg sandwich on English muffin” to 475 for “with sausage.” At a fixed 100 grams, “with ham” is 222 calories and “with sausage” is 264—a fixed-weight separation of 42 calories. For Egg sandwich on an English muffin, the serving view answers “how much is in the database portion?”; the 100-gram view answers “how concentrated is the matched record?” Neither reveals how many grams were actually eaten.
The scaling rule: multiply a per-100-gram value by eaten grams ÷ 100. The arithmetic is exact; the result is only as defensible as the record match and portion estimate.
Preparation analysis
The long description carries the evidence
The published descriptions distinguish forms such as “Egg sandwich on English muffin”, “with bacon”, “with ham”, and “with sausage”. Across the source formulations, the shared backbone includes cheese as ingredient in sandwiches, egg, whole, fried, ns as to fat, and muffins, english, plain, enriched, with ca prop (includes sourdough); differentiating rows include pork sausage, link/patty, cooked, pan-fried, pork, cured, bacon, pre-sliced, cooked, pan-fried, pork, cured, ham -- water added, whole, boneless, separable lean only, heated, roasted, and pork, fresh, separable fat, cooked. On this Egg sandwich on an English muffin page, those rows make the records inspectable, but they are not a controlled experiment: they cannot tell us that one named input, by itself, caused a nutrient difference.
Database precision is not meal certainty. Retain the exact description beside the number so later corrections remain possible.