MDBG Mobile Chinese English Dictionary (iPhone, Android, Windows Phone)

低碳	dī tàn	(attributive) low-carbon; low-carb (diet)
国会	Guó huì	Parliament (UK) / Congress (US) / Diet (Japan) / Legislative Yuan (Taiwan)
健怡	jiàn yí	diet; low-calorie (drink etc)
素食	sù shí	vegetarian food / to eat a vegetarian diet
饮食	yǐn shí	eating and drinking / food and drink; diet
食性	shí xìng	diet (of an animal) / food preferences; eating habits (of a person)
茹素	rú sù	to eat a vegetarian diet
节食	jié shí	to save food / to go on a diet
健怡可乐	Jiàn yí Kě lè	Diet Coke / Coca-Cola Light
坐月子	zuò yuè zi	to convalesce for a month following childbirth, following a special diet, and observing various taboos to protect the body from exposure to the "wind"
无麸质饮食	wú fū zhì yǐn shí	gluten-free diet
减脂	jiǎn zhī	to burn fat; to lose weight (through diet or exercise)
忌口	jì kǒu	abstain from certain food (as when ill) / avoid certain foods / be on a diet
跌停	diē tíng	(of a stock price) to fall to the daily lower limit (resulting in a suspension of trade in the stock)
盐酸克仑特罗	yán suān kè lún tè luó	clenbuterol hydrochloride (diet pill that burns fat) / e.g. Spiropent
蔬食	shū shí	vegetarian meal / vegetarian diet
生酮饮食	shēng tóng yǐn shí	ketogenic diet
杂食	zá shí	omnivorous (zoology) / snacks / a varied diet
开斋	kāi zhāi	to stop following a vegetarian diet / to break a fast
纯素食	chún sù shí	vegan food; vegan diet; (attributive) vegan