It's not only about eating less, but also about limiting the amount of protein we ingest. Research by Professor Valter Longo of the University of Southern California suggests that when the level of IGF-1 drops, our bodies switch from "growth mode" to "repair mode".
BBC journalist Michael Mosley went on the 5:2 diet, which involves eating normally for five days a week, then only consuming 600 calories for two days. Despite this reduced calorie intake two days a week, he didn」t crave more food on other days: "On my feed days I ate what I normally do and felt no need to gorge." However, he adds that "Current medical opinion is that the benefits of fasting are uNPRoven and until there are more human studies it's better to eat at least 2000 calories a day. Fasting, like eating, is best done in moderation."
For those who want to reduce their weight whilst maintaining a varied diet, fasting for short periods of time might be healthier than crash diets or yo-yo dieting. However, others might decide they have enough on their plate without having to think constantly about what they eat. Either way, information about fasting provides food for thought.
Quiz 測驗 1. What happens to mice when they consume fewer calories?
Mice that consume fewer calories live longer.
2. Why is it better to have a low level of the growth hormone IGF-1?
A high level of IGF-1 can make us age more quickly, whereas a low level of IGF-1 can be protective and help prevent age-related diseases.
3. Which verb in the article means "to really want to eat something"?
To crave. It can also be used as a noun: if you have "a craving" for chocolate, it means you really want to eat chocolate.
4. Why should we be careful when fasting?
We should be careful because the benefits of fasting are uNPRoven.
5. What is the name of a diet that makes someone's weight go up and down?
Yo-yo dieting. This is what we call diets that don't lead to long-term weight loss, so a person's weight fluctuates.
Glossary 词汇表 a gargantuan appetite驚人的食慾 to go on a diet節食 hard to swallow難以接受 to fast禁食，齋戒 calorie intake卡路里攝入量；熱量攝取 age-related disease老化伴隨病 protein蛋白質 to ingest攝取，吸收 to consume消耗 to crave渴望 to gorge狼吞虎咽 in moderation適量的，有節制的 a varied diet一個均衡多樣化的飲食 a crash diet速成食療 yo-yo dieting悠悠球式減肥（指節食後達到體重減輕，但過一段時間體重增加又要節食的循環） to have enough on one」s plate一個人已經有很多令人操心的事情要處理 food for thought令人深思的東西或話
