Free eBook: Honoring God With Your Health

Download Now

12 Signs You’re Undereating – The Fed and Fearless Podcast Episode 22

This post may contain affiliate links.

Could you be undereating and not even know it? If you have more than one of the twelve common signs and symptoms I’m talking about today, you might need to take a look at your caloric intake!



Or listen and subscribe for free on your favorite app: Apple Podcasts | Spotify | Stitcher | Google Play | Android | TuneIn


signs you may be undereating

On today’s episode, I’m talking about 12 signs that you could be undereating.

Did you know that it’s possible to be undereating for so long that you actually stop losing weight? This is one of the reasons why so many people believe they can’t be undereating since their weight isn’t going down, which often leads them to eat even fewer calories. 

You should be having a bowel movement at least once a day. If it’s less often, this could be a sign that you’re not eating enough calories. Another sign is if you’re cold all the time since your body isn’t getting enough calories to keep it warm.

One of the biggest signs of undereating, and one that I work with a lot of women for, is the lack of a menstrual cycle. If you’re malnourished, your body will think that you’re not in a position to bear and raise children, common during times of famine, so will naturally stop producing a period.

Have you ever found that after a challenging mental day, you’re feeling even more tired than if you do physical activity? This is because your brain uses glucose, a type of sugar, to function – and thinking can take a lot out of you!

The last sign is a surprising one: getting up to pee during the night, even once, could indicate a lack of calories in your diet. When you’re eating enough, you should be sleeping through the night. And your bladder, along with most of your other organs, should be resting, too. 

Are you finding yourself checking off more than one of the items on this list? Are you someone who used to feel this way and find that eating more helped resolve these issues? Let me know in the comments below! 


Got a question you’d love to hear me answer on the show? Leave me a voice message here!



  • The role of cortisol in our body
  • Circumstances that could lead to undereating
  • How weight stability might not be an indication that you’re eating enough
  • How many times a day you should go to the bathroom
  • The number your basal body temperature should never drop below
  • How inadequate calorie intake can affect your menstrual cycle
  • Why we feel more tired when we are using a lot of brainpower
  • What it can mean if you’re getting up to pee during the night



“If undereating is creating a chronic stress response in your body, dropping those stress hormones by eating more is something that initially can make you feel more tired.” (19:32)

“The truth is that being underfed chronically keeps your nervous system in a fight or flight mode. So, essentially you’re body is going to think anything that’s a threat is going to be much larger a threat than it actually is and it’s going to have that heightened stress response, even in the face of simple daily stressors..” (37:22)

“In a perfect world, if we’re not having any stress at all, our cortisol should be at it’s highest point within 30 minutes of waking up. So if you’re having a spike in cortisol at night when you’re supposed to be asleep, this can actually wake you and your organs up.” (45:31)



Join my Free Webinar: How To Get A Regular Period Without Birth Control

Find Fed and Fearless Online

Got a question you’d love to hear me answer on the show? Leave me a voice message here!

Join the Fed and Fearless Society on Facebook

Follow me on Facebook | Instagram | Twitter | Pinterest

Share your Thoughts

Share Your Thoughts

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

Website Protected by Spam Master

  1. I can relate to almost every symptom you’ve shared, and it’s crazy to reflect on how long I’ve been truly under-eating and the health issues that have emerged from that; I have never connected anxiety, sleep disturbances, being cold, hair thinning, and my tipping point, loss of period, to my diet! Thanks for being such an eye-opener, Laura.

  2. Such a helpful lesson explaining what under-eating is and what it looks like for our health. So grateful Laura took the time to give a thorough explanation. I learned a lot – I had no idea some how some of those symptoms were connected!

  3. I know for sure my mom is undereating and she’s been doing it for over a decade now. I haven’t been able to convince her to see that literally ALL of her health problems are a result of her undereating. She wants to maintain her weight under 100 lb because she has “thick” legs and she did it gradually, but her normal body weight is more around 120-125 lbs. She’s waking up frequently in the middle of the night, feeling really cold after meals, throwing up during meals, very poor short term memory (granted she’s also 60 years old now), persistent “hot flashes” which she attributes to just her poor transition into menopause. She only eats like half a cup of rice a day and everything else is just veggies, nuts and protein. I have been trying to tell her for a while now that she is undereating but she doesn’t believe me. She really thinks it’s just a dysfunction of her kidneys and liver (which I don’t doubt are there) but…I’m really concerned for her these days. Especially since she recently started throwing up more (not intentionally) but she just continues eating. She also is primarily Mandarin-speaking so I don’t know if you are aware of any resources in Chinese on this issue?

    1. Hi Debbie, unfortunately I’m not aware of any resources on this in Chinese – honestly there aren’t many resources in English! You may want to get her hooked up with a dietitian/nutritionist who can help her ensure she’s appropriately fueling her body.