weight loss; weight reduction; decrease in body weight
A straightforward compound noun used in medical, health, and everyday contexts to refer to a reduction in body weight.
Rapid weight loss is bad for your health.
The doctor investigated the cause of the weight loss.
減量 is a more general term for reduction in quantity or weight, often used in contexts like dieting or manufacturing, while 体重減少 specifically refers to a decrease in body weight.
ダイエット refers to a diet or weight-loss regimen, emphasizing the intentional effort, whereas 体重減少 is the objective result of losing weight.
Compound of 体重 (body weight) and 減少 (decrease, reduction).