Spreading jam thin is the only honest portion control here. A WHO umbrella review (Hajishafiee et al., BMC Public Health 2023) confirmed continuous dose-response between free sugars and dental caries. This jam runs 278 kcal and 48.5 g sugar per 100 g — a heaping spoon is ~50 kcal.
How should I track Jams and preserves?
The trickiest part about tracking Jams and preserves is that small portions pack a lot of calories, and most people estimate sweet portions poorly. Research (Almiron-Roig et al., Appetite 2013) found that calorie-dense foods are underestimated by 50–200% when portioned by eye. Weighing on a scale takes the guesswork out. And here is the mindset shift that helps: tracking sweets is not about guilt. It is about awareness. When you log a treat honestly, you can plan around it and still hit your targets for the day.