Dr Ray Peat Inspired Weight Loss

ray peat, weight loss, metabolism, losing fat, healthy

So interesting reading in the RP groups recently and the study where a bunch of guys were given 6,000 calories and no exercise and demonstrated that while their metabolism increased, so too did their fat and other, not so great, health markers.

While the study was extreme, I think it was a great example of how too many people emphasise the increase of calories as the only way to get to health and a higher metabolism using Ray Peat principles. (Anything under 2,500 calories was deemed to be an eating disorder! What?)

I’ve never agreed with this and as a result, didn’t increase weight while switching around my diet. I was about 5kgs (10lbs) overweight when my low carb world came crashing down around me, but I stuck to about the same calorie level as before – about 1400cal – while I moved away from fat bombs to more fruit, juice, honey and lean protein.

Now I’m settled on about 1800 cal and still working on the perfect macro mix for me. (To put it in context, I am 5’10” and about 140lb (63kg) – I have a sedentary job and my only exercise is a bit of walking and 10 minutes of weights daily as per my exercise program www.onetentoned.com. )

So here are the factors considered to be important around fat loss:


– must get your 8 hours or you are behind the 8-ball and your body will be stressed. Also the body burns fat at rest, so lack of sleep is severely limiting your opportunity to do this. (It’s why shift workers and new mums generally have issues.)


– keeps cortisol and adrenaline continuously elevated which hangs on to your fat stores and messes up your hormones. So many things cause it like excessive cardio, drinking coffee first thing in the morning, fasted exercise, just not eating something for breakfast, which is on top of normal life stresses like money, kids, job, relationships, lack of rest and sleep etc. Read more about cortisol here.


Ray Peat:In recent years there have been studies showing that regular milk drinkers are less fat than people who don’t drink it. Although the high quality protein and saturated fat undoubtedly contribute to milk’s anti-obesity effect, the high calcium content is probably the main factor.”

 Which is why I drink 1 litre (4 cups) of skim milk a day – as this yields the minimum daily requirement for calcium – 1200mg.


– many benefits of sun exposure especially on your brain. Recommended 20 minutes a day, which creates Vitamin D, which in turn helps the absorption of… Calcium! (See how all the factors work together?)

 Type of exercise

– exercise that is not beneficial to permanent weight loss is excess cardio, which creates stress, lowers your metabolism and in some cases damages the thyroid. Walking is fine in moderation, and a little weight bearing exercise encourages muscle growth and increased metabolism 24 hours a day. Read more here: www.onetentoned.com

Gut health

– probably the key to everything in your body really and wrong bacteria can also prevent you from losing weight. If you are intolerant to anything, this is a tell tale sign of gut issues. It usually starts with wheat/gluten, which causes leaky gut and if not fixed, then you slowly become intolerant to more things like dairy etc.

This article explains more about the gut bacteria weight loss link, even though I don’t agree with their dietary recommendations.

Calorie Level Balanced to Needs

– as mentioned at the start, drastically increase calories to force a response is not the answer. All this does is make everyone fat. Plug your vitals into something like www.cronometer.com and work out what your approximate calories should be to maintain your weight. From there, if you are under eating at say 1200 cal and you should be 1800 cal, then increase by 100 cal per day for a month to let your body settle into it, while you work out your optimal mix of foods below.

 Type of food

– important for whole body health as well as metabolism and weight loss, but the foods in the Ray Peat protocol go against most alternative health theories. To see exactly what to eat and what not to eat see these posts:

Eating Peaty: What not to eat.

Eating Peaty: What to eat.

More importantly though, I want to touch on low fat intake for weight/fat loss because I think this is basically the key when eating Peaty.

Certainly reading the forums, the people who have had the most success in cutting weight/fat from their body with RP eating, have gone super low fat – like 10-15g a day. And the reason for it is this:

Free fatty acids inhibit glucose metabolism

 So when we are trying to remove the PUFAs from our body, this is a particularly toxic/damaging state. Where as if the fats are saturated, it’s not as bad.

So that would explain why some people have said they went low fat for a while (which would clear out the PUFAs as fast as possible,) but could then increase dietary saturated fats again somewhat and still not increase the weight/body fat again.

But still we are not talking a lot of fat, maybe increasing to 50g max per day because whether we like it or not, this way of eating is high carbs; and high fat and high carbs together are a particularly lethal mix for weight gain.

So it’s the same advice as with calories, don’t make any sudden moves. Check your fat intake for a typical day, so you know approximately where you stand. (More importantly too, check the foods contributing to the fat – eggs and cheese are the killers for me even before adding any butter etc to cooking!) Then try for the next month or so to decrease by 10g of fat a day and increase carbs and see how it feels.

Some say they get too hungry – make sure you replace the fat calories with protein or carbs.

Some say they don’t sleep as well – try eating your fat for the day in your evening meal.

Some say they just don’t feel as satisfied – make sure the foods you do eat are nutrient rich like fruit instead of plain sugar or rice which are just pure carbs with no other nutritional value.

 Let us know if lowering fat does or doesn’t work for you and why.

 Metabolic rate

– this is important for weight loss as well and is the sum of all the above. It’s good to know where you sit with waking temperature and pulse and if they are not optimal yet, then keep working on that before you try to lose weight.

However as I have said previously, I don’t believe you have to increase calories drastically to improve your metabolism, as this will only increase your body fat on the journey. (If you are already overweight from increasing calories, start the journey back to lowering them again until your find your balance, but super slowly, so that all your health gains don’t disappear as well.)

I raised my body temperature from 35.3C waking to 36.7C and have reached 37.7C after good meals of fish and fruit for example, while maintaining a similar caloric level, but it took 2 years to do this. (It may have taken a shorter time frame if I had known about the low fat part.)


It’s the right mix of food at the right caloric level for your needs, as well as putting all the other factors mentioned above in place and being patient. It took me 2 years of tweaking to make progress and still I have to recheck my fat intake about once a quarter, as it is so easy to creep up. Cottage cheese is now my best friend!

Join us on the private facebook group for more discussion on this. Please post your questions, so everyone can let you know what is working for them.

Let’s keep learning; we’ll get there!


Kristy x

2 thoughts on “Dr Ray Peat Inspired Weight Loss

  1. Sarah

    Hello. Glad I found your website and blog. I too was like you – 30 years of dieting, then low calorie and low carbing broke my health and my sleep. I got both back thanks to a wonderful medical herbalist who had fixed her sleep issues by using the Ray peat way of eating and helped me do the same (along with a wonderful drink). Peating has however cost me my figure (not so for my herbalist partner) and it’s a common story It would seem. You have clearly overcome that hurdle so to get the weight off in short is to keep the fat low is that correct? I always start the day with two eggs and a piece of fruit. Would love to know what you eat for breakfast and what a typical day on a plate looks like. Are you able to share? Thanks for the blogs – I’ve shared a few on our twitter feed! Sarah

    1. slimbirdy Post author

      Hi Sarah, great to hear from you! Yes low carb has messed up a few of us for sure. And Peating helps the restore the health but add the kgs for most. You’ve fixed the sleep part, so that is kind of the most important, and the right type of food, so next would be the correct calorie level and low fat definitely worked for me as well. Another element that is working is my exercise program, just enough muscle building without negatively impacting the metabolism. Food wise a really good cottage cheese is a lifesaver because it is so high in protein without the fat – you have to find one without gums or stabilisers or whatever. Low fat quark is good too. I like to mix it with low fat sweetened condensed milk and have it with fruit or for a savoury dish I mix it with a bit of tomato sauce and have it with home made fries! I think most people are struggling with the ‘what to eat’ part so I’m really going to try and include more of that on my blog this year. Maybe my day on a plate can be my next blog post – by request! In the meantime here are some other snacky options to try http://slimbirdy.com/2018/04/21/pro-metabolic-snack-ideas/ – thanks for stopping by! And I will mention your website in my Slim Birdy Group as I just did a post on sleep the other day. Cheers Kristy x


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