A patient lost 30 lb and their BMR decreased from 1700 kcal/day to 1550 kcal/day. How many fewer calories per day must they now consume compared to their prior BMR to maintain the new weight (assuming activity level unchanged)? Show the calculation.

• A. No change; BMR differences are irrelevant once weight is lost and maintenance calories remain the same as prior to weight loss.
• B. Approximately 150 kcal/day fewer.
• C. Approximately 50 kcal/day fewer to account only for lean mass adjustments and not total BMR change.
• D. Approximately 300 kcal/day fewer because BMR changes always double when activity levels are constant to account for thermic effect of food adjustments.

Answer: (B)