Our Keto Nutritionist Shares her Views on Intermittent Fasting & Circadian Rhythm Fasting

Hip2Keto may earn a small commission via affiliate links in this post. Read our full disclosure policy here.

More Ask Our Keto Nutritionist

woman writing down lunch plans in notebook

Got questions for a nutritionist who “gets” keto?

Our keto nutritionist is here to help you with everything from Intermittent Fasting to Circadian Rhythm Fasting – all to keep you happy and healthy on your keto diet. Please note that we’re not doctors, so if you have any specific questions regarding your own health, please consult with your trusted medical partner.

I feel cold when I intermittent fast. Is this normal?

person holding blanket around themselves

Digesting food creates heat, so when fasting, you’re producing less heat resulting in a decrease in core body temperature. Feeling cold during an IF is pretty common, especially if fasting is something you’re not used to.

As your body adapts, temperature changes will usually improve, but feeling a bit colder may not entirely go away. If feeling cold is persistent beyond fasting, I would advise seeing your doctor and consider checking thyroid function.

Read more tips & tricks for keto fasts here!

Is it ok to intermittent fast every day?

intermittent fasting eating schedules and tips

Intermittent fasting (IF) goes very well with keto and is a great tool to help with health and longevity. However, doing an intermittent fast on a daily basis may make it difficult to get all the nutrients your body needs to be healthy and function properly.

One has to be very mindful to ensure they’re getting good nutrition and calories in the allotted eating window of the IF schedule. Also, having too strict of a calorie deficit on a daily basis may eventually result in lowering your metabolic rate (less energy needed by the body = fewer calories burned and more calories stored as fat).

I recommend alternating IF or having breaks, such as one day on, one day off, or incorporating IF 2-4 days per week with a full break on the off days. This will keep your internal engine revved up and allow for replenishing nutrition to your body.

What is circadian rhythm fasting?

alarm clock on nightstand next to bed

Circadian rhythm fasting (also known as “time-restricted eating”) is based on timing the window of eating and fasting with our body’s internal clock. Primarily, the goal is to stop eating about 2-3 hours before bedtime with a fasting window of ~ 12-14 hours, essentially timing your eating schedule around sunset and sunrise.

With circadian rhythm fasting, no substances should be consumed that can cause your gut to stay awake when it should be resting. This includes coffee, teas, zero-calorie sweeteners, etc. — Only plain water is allowed.

Although circadian rhythm fasting may help with weight loss, this is not the main purpose, but rather for optimizing health by decreasing risk factors for chronic disease, in turn improving life span. Think longevity!

Our Keto Nutritionist Shares Her Views on Success in the New Year, Communion, & Fad Diets

Join The Discussion

Comments 3

  1. Breanna

    I typically fast everyday. Not because I IF perse but because that is what is natural to me. I eat between 9:30-5:30. That is when I am hungry first. I love how intuitive KETO eating is. I always forced myself to eat before because I was told that is what you were “supposed” to do. Now I just eat if I am hungry and don’t eat if I am not. I don’t worry about the time of day. It honestly is so freeing.

  2. Charwyn Wyndham

    I’m an early riser, 6:00. I usually started my day with coffee and cream and ate breakfast around 8:00. I’m surprised how much energy I have fasting. I have done IF before with good results.

    • Amber (Hip Sidekick)

      Awesome! Glad to hear it has been successful for you in the past! Thanks for sharing with us, Charwyn!

Leave a Reply

Your email address will not be published. Required fields are marked *

OOPS! Be sure to login or register to access this feature. It's FREE!

Forgot Password?

Don't have an account? Register

Forgot Password

Don't have an account? Register

Already have an account? Login

Thank you for rating!

Would you also like to leave us a comment?