Preview Mode Links will not work in preview mode

Peak Human - Unbiased Nutrition Info for Optimum Health, Fitness & Living

May 26, 2021

Hello everyone! I’m Brian Sanders and welcome back to the Peak Human podcast. Don’t forget to start back at episode 1. This is that kind of podcast. It’s not something I do each week with random people to create content so I can advertise people’s products. It’s a health journey I’ve been on for years where I talk to the best and brightest from around the world. The only products or services I talk about to support the show are my own that I have created with the best people I can find to provide great value to you and your friends & family as well as my own. Those are at

But onto my guest today. This may be a hard one for some people to handle who are triggered easily by differing opinions. I talk with Keith today about adding carbs back into your diet. Many people have found so much success removing them from their diet, this may sound counterintuitive. However, some people may be having problems after going too low carb for too long. If you’re not one of these people, then feel free to skip this episode. But if you have cold hands or feet, low body temperature (which I had and didn’t really know), wake up in the night, are a female who has lost their period, don’t sleep well, or have some other problems, you may have low thyroid problems. One way people have cleared up some of these issues is eating more whole food carbs, honey, fruit, sweet potatoes, etc. 

He is in a different dietary camp that does agree that PUFAs and seed oils are the enemy, saturated fat is fine, and eating nose to tail including things like liver and oysters is great. BUt they also believe carbs are good for the thyroid and do question fasting and extended keto diets. 

Really don’t want to be dogmatic about diets so I wanted to have Keith on to talk about this strategy. I’ve seen it work for some people in the carnivore world that went a bit overboard, for example. I have been raising my body temperature and presumably my thyroid function by eating more carbs at night after my brief, intense workout. 

Keith Littlewood has been involved in the health, fitness and wellbeing industry for over 20 years and after working for a variety of organisations delivering training and rehabilitation strategies around the world. He is passionate about delivering services that resolve pain, energy, digestion, sleep, mood and other hormone related issues to get people functioning at their best. 

He has a masters of science degree in endocrinology with distinction, researching the accuracy of thyroid stimulating hormone in the face of mounting pollution, stress and nutrition factors and is currently getting his PhD.






  • [5:50] His background and emphasis on the thyroid function.
  • [9:55] Criticisms of functional medicine.
  • [12:50] Thyroid protocols and tests. 
  • [19:20] How temperature can indicate healthy thyroid function or not.
  • [29:00] His thoughts on sugar consumption.
  • [42:20] How environmental pollution can affect the thyroid.  
  • [45:10] How to protect yourself from environmental pollutants. 
  • [49:10] How calorie restriction and keto diets can affect the function of the thyroid. 
  • [59:30] Glucose monitors and spikes/dips in blood sugar levels.
  • [1:01:50] Possibility of omega-3s causing damage to the brain?
  • [1:11:00] Heart rate and thyroid function.
  • [1:17:40] Vitamin A and thyroid function. 
  • [1:20:15] Carrots, cruciferous vegetables, dairy, and caffeine.
  • [1:23:50] Do you need to have a fast metabolism?





Follow along: