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Interesting. I remember reading Atkins adamantly insisting that exercise, along with portion control, were irrelevant for LC weight loss. The exercise part didn't make sense, given its role in glucose management for diabetics. There goes another excuse not to exercise.

J. Stanton -- I follow a diet similar to Peggy from the Primal Parent and like most people on VLC I'm going to say that the problems people in your comment section are having are because not enough fat causing low blood sugar

Even after you're saying that primal diets are high fat, there's still people who go keto and stay relatively low fat and think they're on a 'ketogenic' diet. No brah, you're on a low-blood sugar diet

Julianne - carbs aren't needed to produce serotonin. Our serotonin/prolactin levels increase as our insulin levels increases, they decrease as our insulin levels decrease -- Someone who's keto-adapted gets insulin from fat, so for them, fat produces serotonin

Really, people need something new to talk about I know, but 99% of the anti-keto posts around the web are assuming that people on keto diets are in low insulin states. Vit C deficiency? Long term low insulin. Poor cognitive function? low insulin. Electrolyte imbalance? Low insulin.

Seriously now, someone understand that you can have good insulin levels on a keto diet, the problem is that you have to eat lots of fat -- the only modern meat that meets the criteria is fatty steaks, expense pork, and sausages. This is why the famous all-meat advocate Owsley 'The Bear' Stanley lived on fatty steaks as his definite source. You simply need a high fat-to-protein ratio if you're going to make the low carb diet work

Anyways, thanks for the work. This blog and Emily Deans are by far the best paleo blogs, both for how frequent you guys post and the good material -- Hope you remind these unhealthy low-blood sugar 'keto' dieters to increase their fat before they end up with nutrition deficiencies from low insulin levels

JS,

Thanks for this great post. I've been doing keto (not almost-keto) for almost 2 years now, and it's worked beautifully: lost 60 pounds, no hunger pangs, seemingly infinite energy on tap when I need it (to include exercising)... but I'm getting to the point where I'm weight-stable at about 21% body fat, and I'd like to drop a few percentage points. This article is really hitting home for me, as I have mostly discounted exercise. I knew about HGH and glucose/insulin sensitizing effects, but this puts another spin on things. In fact, I am going to commit myself to some moderate, non-hunger-inducing exercise in my schedule for 2 or 3 months to see if I can effect any sort of change in my homeostasis.

So, thanks again, and especially thank you for being a paleo writer who doesn't dump on ketosis - a valuable and, IMO, healthy metabolic state. (If you commit to it.)

Hi, I'm very confused on "The Difference Between Beta-Oxidation and Ketosis". How are they different exactly? I thought that they happen in parallel and ketosis is a product of beta-oxidation. Are you saying that your body can get energy from beta-oxidation without depleting your glycogen stores first or depleting them slower so you never go into ketosis? Or does the quantity of ketones produced have to be large to be in ketosis?

My understanding is that ketone bodies are formed by ketogenesis when the liver glycogen stores are depleted, which happens periodically to most people (who have a proper working metabolism) and who are either VLC, or just LC and haven't eaten in a while, or normal carbs but do intermittent fasting, or work out a lot. Don't you think you would be in ketosis after intermittent fasting and on top of it working out during a fast?

thanks.

I would be interested/puzzled on this comment on excercise:

"...The thing with exercise and met flex is that the effect of each session only lasts a couple days. Basically, exercise depletes muscle glycogen (if you exercise hard enough…short and intense is better than long and slow)...."

I'n in belief, that in general easy exercise is the one, which developes fat burn qualities (e.g L.S.D. runs for marathon to prepare fat burn to carry you the distance..). But is the above quote only related to getting to ketosis or some other connection I missed..?

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