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We thank Dr Welsby for reminding readers that weight loss occurs by the excretion of atoms, not energy (calories).1 However, we worry that his inchoate hypothesis will only add further confusion to an area that already bewilders the general public and health professionals alike. The majority of doctors, dietitians and personal trainers we surveyed believed …
Contributors RM and AB coauthored this letter.
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.