Welcome to The Fast Diet › The official Fast forums › Food › Recipes › for woman, it is 500ca or 500Ca?
This topic contains 5 replies, has 5 voices, and was last updated by russianbluecat 2 years, 2 months ago.
Viewing 6 posts - 1 through 6 (of 6 total)
3 Feb 17
if I confine my calories to 500ca, I could almost eat nothing, perhaps 1/1000 toufu (500g).
So does it mean 500Ca (500kca) ?
Your question is a little confusing, but it is 500 calories for a fasting day. This is around 1/4 of what you would eat on a non-fasting day (depending on your TDEE), if that helps you see it better.
Some people do prefer to eat nothing on a fast day and just drink water, but with a little creativity most of us find ways to make 500 calories stretch with soup, salads or perhaps only eating one meal in the evening.
Welcome to 5:2! Read through some of the topics for inspiration on finding what works for you. Good luck!
4 Feb 17
The energy is expressed as either calories (usually abbreviated to cal or ca); or as kilojoules (usually abbreviated as kj or kcal). There are also abbreviations for 1000 times the basic measure – eg Mj means 1000 kilojoules – however these types of abbreviations usually only occur in scientific papers.
1 Calories equals roughly 4.2 Kilojoules. So the daily limit for a fast day (for women) is 500 calories or 2100 kilojoules.
Whether you use calories or kilojoules to count your food intake will usually depend on where you live. Kilojoules is a metric measure and tends to be what is on all of the food labelling in countries that use metric (litres and grams) as their official measuring method (eg in Australia). Countries that use imperial measurements (pounds and ounces) use calories (eg US and UK).
It doesn’t matter what measurement system you use as long as you consume the right amount of food, so 500 calories or 2100 kilojoules.
Regarding your tofu example. The energy in tofu varies a lot between brands, but the one in my fridge at the moment has 270kj or 64 calories per 100grams (just over 3 ounces).
LJoyce, you’re confusing KCal and KJ (they aren’t the same).
The confusion lies in that there are two types of ‘calories’… the gram calorie (energy needed to raise 1 gram of water by 1 degree celcius), ‘cal’ = 4.2 ‘joules’, and the kilogram calorie (or food calorie, the one you see printed on food lables), ‘Cal’ = 4.2 KJ
…so, the answer to the original question is 500Cal (with the big C – and yes, that = 500kca, not that you would ever see ca printed on a food lable – I hope)
…more info than you ever wanted to know about the definition of a calorie, here:
5 Feb 17
Sorry, all the food labels in Australia just say kilojoules or kj, I always assumed that when people in other countries referred to kcal they meant the same thing. Always happy to learn new things.
14 Feb 17
In the UK it’s always in kj and kc … they give both on all the packaging I’ve seen.
You must be logged in to reply.
Username or Email:
Track your weight and measurements, BMI and TDEE with our new tracker.
The Fast books are available throughout the world and in many different languages. Buy a copy today.
Michael Mosley gives an update for 2019, current research in the field and announces a tour starting in February.
Michael looks at the Horizon special, "What's the Right Diet for You" and tells us which diet they say is best for him.
Results from our tracker show that the average weight lost over the first three months on The Fast Diet is 5-6 kgs (11 to 13 lbs).
• All featured posts •
in Support, chat and encourage • updated 22 minutes ago by 165gw
in Weight loss • updated 27 minutes ago by matpi
in Welcome to The Fast Diet and Exercise forums • updated 30 minutes ago by Neilithicman
• All recent topics •
Copyright © 2019 Michael Mosley and Mimi Spencer
Technical questions or problems with the site? Please email our technical contact.