The FastDay Forum

Fasting with Medical Conditions

2 posts Page 1 of 1
Comment on my weight loss
27 Sep 2018, 10:50

ADFnFuel wrote that the 'site-wide wisdom' as he so eloquently phrased it, is that you lose approx 0.5 kg a week with 5/2. This is correct if you restrict your calories to 500/600 twice a week and calculate the calorie deficit. However, I have a thyroid problem (thyroid stopped working altogether) and therefore was put on synthetic thyroid hormone. Apparently the dosage was far too low, because I gained 4 kg in ten days whilst eating normally. I then immediately reinstated the 5/2 regime and upped the dosage of my thyrax. This was later authorised by my internist I hasten to add, it's not something you should do without medical supervision. The point I'm trying to make is that my weight loss of 1 kg a week can in part be ascribed to 5/2 but also to my thyrax, which undoubtedly increased my BMR, which obviously in turn helps the weight loss. The reason I explain this so extensively is to prevent other fasters from becoming disappointed - 0.5 kg/week is the average and there are weeks without any weight loss at all. The thing is to persevere notwithstanding. All the best to my fellow fasters.
Re: Comment on my weight loss
27 Sep 2018, 21:13
Actually, truth be told, my phrasing was more an indication of laziness to avoid looking up the original thread that discussed expectations and probable outcomes.

Interesting, from a quick search, that fasting isn't necessarily contra-indicated for thyroid issues.

It is possible, with a bit of experience, to increase one's weight loss rate if desired. For example, moving to 4:3 - Monday, Wednesday, Friday instead of the more common Monday, Wednesday 5:2 fast days adds just one day but can have a noticeable effect. ADF adds another 1/2 day per week but also eliminates schedule flexibility. (For reference, my own ADF-based rate was over 2 kg per week for several months. Roscoe's loss rate was up there too; feel free however to discount both since we are male.)

Another simple step is to completely skip that 500 calorie evening meal. Very convenient because there's no calorie counting required, nor meal prep or clean up either. BTW, that "25% of daily calories" number was originally included in 5:2 as an astute psychological tactic to ease first timers into the seemingly abrupt and radically contrarian idea of fasting (gasp!).

I believe that the upper limit to a possible weight loss rate is one's BMR divided by the number of calories in a pound - roughly 6/10th of a pound (1.3kg) per day with a full, liquid-only fast - no calories consumed at all. The body has no choice but to utilize body fat given this scenario. But then what's the rush? There's are many other considerations that lead to a permanent solution.

2 posts Page 1 of 1
Similar Topics

Who is online

Users browsing this forum: No registered users and 1 guest


Be healthier. Lose weight. Eat the foods you love, most of the time.

Learn about the 5:2 diet

We've got loads of info about intermittent fasting, written in a way which is easy to understand. Whether you're wondering about side effects or why the scales aren't budging, we've got all you need to know.

Your intermittent fasting questions answered ASK QUESTIONS & GET SUPPORT
Come along to the FastDay Forum, we're a friendly bunch and happy to answer your fasting questions and offer support. Why not join in one of our regular challenges to help you towards your goal weight?

Use our free 5:2 diet tracker FREE 5:2 DIET PROGRESS TRACKER & BLOG
Tracking your diet progress is great for staying motivated. Chart your measurements and keep tabs on your daily calorie needs. You can even create a free blog to journal your 5:2 experience!