How accurate is manual calorie logging really?
I've been reading research on self-reported dietary intake and the numbers are sobering. Studies consistently show people underreport by 30-50%. Even trained dietitians are off by 10-20%.
So when we're all meticulously logging in MFP, how accurate are we really?
You're citing valid research. The key insight is the difference between accuracy and consistency. If you consistently underreport by 15%, and adjust based on real-world results, the absolute accuracy matters less.
This is why I weigh everything. Eyeballing a "tablespoon" of peanut butter? You're probably eating 2-3 tbsp.
Sneaky error sources: cooking oils, condiments, portion creep, the "just a bite" tax, and drinks (especially alcohol).
I think AI-assisted logging might help. Tools that estimate from photos add an objective layer not subject to the same biases as self-reporting.
Tracking is more about building awareness than getting exact numbers. After a few months you intuitively understand portion sizes and calorie density.
Food labels themselves can be off by 20% under FDA regulations. So even perfect logging has built-in error. Use tracking as a rough guide and adjust based on results.
This honestly makes me feel better lol. I always felt guilty about not being more precise.
Great responses everyone. Takeaway: track consistently, use a food scale when practical, don't stress about perfection, and adjust based on real-world outcomes.