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Wifi and other non-native (to the human body) electromagnetic forces cause anxiety because they disturb the energetic fields of the body. The body is basically being stressed at a low level. Unfortunately, this is hard to avoid in our modern world, especially because this health correlation is covered up.
If you have the ability and control over your internet, you could try and change your computers over to wire only, although this is not always convenient. Always, mobile devices cannot work in this configuration. You can try moving your router into a spot farther from yourself or from your bedroom. This will reduce your exposure. I know that drinking water can offset some of the harm done, so stay hydrated. (My source is Dr. Jack Kruse on this).
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If you are feeling anxious, timid, hard to wake up in the morning...this points towards yang deficiency, such as kidney yang deficiency. I forget if I asked, but do you have undereye bags or discoloration? Low back pain, knee pain, wake up at night frequently? The Kidney 3 acupoint would help this, as well as the T5R.
If you have access to supplements, you could try ashwaganda. There are some other herbal routes as well, but this is a common one so perhaps you could get it more easily. It has a heavy/oily and yang energy to it. In this way it calms the nerves and can help kidney yang energy.
In excess it can be a little slowing on the body, but so are the benzos. Most herbs that slow the nerves are going to be generally slowing anyway.
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It's ok if the vegetable choices aren't the best. You have to do the best with what you can and what is not inconvenient.
That is correct that abstinence is not the way to go. This applies to thinks like vegan or keto that chop out entire food groups. The vata-kapha diet, or any other holistic diet, is not this however, because all it means is choosing the foods out of each food group that balance you better.
For example, a person who has a pitta (fire) imbalance, would want to pick meats such as chicken that are neutral, rather than lamb which is very heating. This applies to all food groups in that you pick certain foods that suit you best. You are still eating meat, in this case, and you would never become deficient in something like you would with veganism.
What HPS Pythia is saying is more about Zevism as an ideology. Even if someone within our midst becomes a vegan, which is very silly, we would never say they are not Zevists. In New Age circles, for example, they say eating animals "weighs down your soul" and prevents it from "ascending". We know that Christianity/Islam also have dietary restrictions.
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The vata-kapha diet is just my suggestion because anxious thoughts are more of a vata (air) element excess imbalance, whereas weight gain and feeling tired and slow are kapha (earth/water) element excess imbalances. Therefore, a vata-kapha balancing diet is one that is nourishing and calming without being overly oily or dampness producing.
You don't have to make any changes you aren't comfortable, and you don't have to adopt the dietary guidelines in their entirety either. Perhaps you could just remove the worst offending food choices, and add a few beneficial ones. You don't have to be super strict.