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"Healthy" people reporting severe/fast acting changes when making bad health decisions.

I often find that people who are more focused on health often report that when they make unhealthy decisions they feel an almost instant decline in performance. For example, If they eat something unhealthy they feel awful (reporting a lack of focus or poor physical performance) or if they don't train they feel anxious. I too often feel like I suffer from this. However, when a person who is less focused on health as a whole makes a "bad" decision, nutritionally or activity wise, they do not report any such feeling, or at the very least do not report a severe change. Have you ever noticed this trend and, if so, what do you think is the cause? It seems to me like people often explain this away as "My body is used to a higher level of function" but this feels extremely surface level.

Metabolism - Longevity - Blood Sugar Levels

In several podcasts I understood that maintaining a low / balanced blood sugar level is key to longevity (besides the items sleep, exercising, low-/balanced carb diet, etc.) - however, even in a very low carb diet, I observed (via a continuous blood glucose monitor from levels) that sugar levels can spike or stay at high level (110-120mg/dl) nevertheless; I do also recall that the liver can produce sugar / glucose too!? Therefore my question: which "actions" can be undertaken, to reduce blood sugar levels sustainably to a recommended level in order to target longevity (looking at the prior mentioned phenomenon of glucose-neo-genesis in the liver and countering this effect) ?

Dealing with blood pressure caused by anxiety

I am a healthy in shape 35 year old, but I suffer from chronic anxiety mostly acquired from my combat deployments. I take my health into my own hands, but one aspect I can’t get under control is my blood pressure. It started out with white coat syndrome at the doctor but would still have normal reads at home. Now I’m at the point where as soon as I hit the button and feel the cuff tighten my anxiety gets the best of me, my HR sky rockets and I get a ridiculously high number that I know isn’t a normal reading. Any idea how to deal with this?

Severe Dopamine Depletion

If I'm almost 100% certain of severe dopamine depletion, how should I best replenish it? Should I cease ALL dopaminergic activities for some time including those that are good for me? Limiting passive dopaminergic activities to 2-3 evening hours doesn't seem to make things better. During the day I'm doing "productive" things I would like to enjoy but rarely do so.

Studying routine

Hi Andrew, what is your studying routine? Which tools do You use (free recall, Feynman technique, etc.)?