‘Is it okay to have cheat days?’

Can you do intermittent fasting if you have gout? What does it take to break a fast? And is there any risk of developing vitamin deficiencies with intermittent fasting?

It’s time for this week’s Q&A about intermittent fasting and low carb with Dr. Jason Fung:

Cheating or off-days

I know, I know, I know… beer is bad, bad, bad for keto. However, I am a homebrewing hobbyist, and a member of a homebrewing club.

Todd

It all comes down to your goals. Obviously, if you have a cheat day one day a week, and you are reaching your goal of weight loss, or diabetes reversal then keep doing it. If, however, you have plateaued or are not reaching your goal, then the cheat days must be restricted. The other option for people is to have a cheat day, and then ‘double up’ their fasting to reach their goals. Again, the results will vary person to person, so you need to judge for yourself how well this works.

Dr. Jason Fung

Uric acid and intermittent fasting

Hello, can you please explain to me why you should not do intermittent fasting if you have gout?

Jolene

Intermittent fasting can increase uric acid levels which can theoretically lead to gout. I say theoretically, because no study has ever shown that, and the current evidence (which is very sparse) is that fasting increases uric acid, but not gout. Gout is caused by the precipitation of uric acid crystals in the joint space. Why uric acid increases is likely due to renal reabsorption of uric acid, so making sure that you get enough hydration and salt may be important to reducing the likelihood of gout.

Dr. Jason Fung

Heavy cream vs breaking an IF

Dr. Fung, first thank you so much for your help and the information you have shared. Will two table spoons of heavy cream in my morning coffee break my fast? Thanks in advance.

David

Technically, yes. The classic fast is water only, so anything else is technically breaking the fast. But that doesn’t mean you can’t get great results using coffee and cream. I usually use this myself. Fasting for weight loss is all about lowering insulin, and the insulin effect of a little cream is small, so you still derive significant benefits.

Dr. Jason Fung

With one meal a day fasting, is there any risk of developing vitamin deficiencies?

With one meal a day fasting, is there any risk of developing vitamin deficiencies, as reduced food consumption also leads to reduced consumption of the volume/quantity of nutrients. I’m talking medium to long term. I am aware that the body can get a lot of nutrients from its reserves, but my question is about the essential ones that the body cannot synthesise and are not stored in fat. How do we compensate for this?

Thanks for your time!

Answer: If you eat nutritious foods during your one meal, you should not become depleted of vitamins as no vitamins are required to be taken more than once a day. If you are still concerned, you may take a multivitamin.

Dr. Jason Fung

More

Intermittent fasting for beginners

A keto diet for beginners

Earlier Q&A

Intermittent fasting Q&A

More with Dr. Fung

All posts by Dr. Fung

Dr. Fung has his own blog at idmprogram.com. He is also active on Twitter.

Dr. Fung’s books The Obesity Code, The Complete Guide to Fasting and The Diabetes Code are available on Amazon.