Coconut water: A great beverage on hot days, coconut water is rich in minerals and nutrients. It contains many electrolytes essential for the body, such as potassium, and has been shown to significantly lower blood pressure in most people who drink it. A study published in West Indian Medical Journal found that drinking coconut water helped 71 percent of participants achieve a significant reduction in systolic blood pressure, and 29 percent of participants achieves a significant reduction in diastolic blood pressure

Providing at least 5 servings of vegetables and 4 servings of fruits daily, which help ensure that you eat plenty of foods that are full of stomach-filling volume yet are low in calories, enhancing weight-loss efforts. Losing excess weight is one of the most effective ways to lower blood pressure in the short term. Eating plenty of nutrient-rich fruits and vegetables also means you’ll be eating excellent sources of potassium, magnesium, and calcium. Many studies have found that foods rich in these minerals help blunt some of the toxic effects of sodium.
If you are dissatisfied with your current nephrologist, you need to either persistently and politely keep asking for more help and more of what you need (e.g. more explanations), or you need to try a different nephrologist. I’m sorry as doing this is a lot of work, but unfortunately, it does sound like you need to work closely with a health professional.
As simple as it sounds, breathing is an effective technique to lower blood pressure. Slow breathing and meditative practices such as yoga can help decrease the stress hormones that elevate renin — a kidney enzyme that raises blood pressure. "Sit in a comfortable chair with armrests. Your body should be as relaxed as possible. Place one hand on a part of your chest or preferably your abdomen. Watch your hand rise and fall with each breath...feel the breath as it moves into your abdomen,” Dr. John M. Kennedy, a cardiologist in Los Angeles, Calif., and author of the book The Heart Health Bible told Medical Daily in an email.  This should be repeated seven times and can become a daily habit by doing deep breathing 10 minutes in the morning.
Eat beets: Rich in vitamins and minerals, this root vegetable can help decrease blood pressure. A 2010 study in hypertension found that drinking only 250ml of juice was needed have a positive effect on blood pressure. Many of the participants saw lowered blood pressure within 24 hours. Another study from 2012 saw that beetroot juice helped lower systolic blood pressure. 
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