Pure fats cause 50–200% portion errors (Almiron-Roig et al., Appetite 2013). Per 100 g: 876 kcal, 99.5 g fat, 0.3 g protein. Ghee is nearly 100% fat — a teaspoon is about 5 g and 45 kcal.
How should I track Butter oil, anhydrous?
The best way to track Butter oil, anhydrous is by weight, not volume. A 200 g serving of yogurt or cheese varies in density between brands and fat levels, so the same portion can differ by 20–40 calories. Research shows people underestimate calorie-dense dairy portions by up to 50% when eyeballing (Almiron-Roig et al., Appetite 2013). A kitchen scale keeps things honest. Also check whether the label lists values for the product as sold or as prepared — some powdered or concentrated dairy products show very different numbers once mixed.
