On another thread @Valentijn recently recommended a commercial electrolyte powder (instead of DIY) to help with OI. The "Electrolyte Stamina Power Pak" she recommended looked good but has too much Vitamin C for me, which leads to fatigue and a general blah feeling. Electromix has been popular with many forum members but hasn't been available recently due to supply shortages. After some searching I found an alternative called Ultima Replenisher. It doesn't contain sugar, it's non-gmo, vegan, with no artificial ingredients. It's available in packets or powder. The powder contains 90 servings. Each serving is mixed in 8-12oz of water. The web site (www.ultimareplenisher.com) is informative, contains a short explanation of the reason for adding each ingredient, and includes a useful FAQ section. I've been taking it for a week: 2 scoops in 2L of water, 3/4 tsp salt added, extra 540mg of potassium powder, and consumed throughout the day (1 scoop is 4.4g, or 1 tsp according the web site). This has helped me to stay upright a little longer while feeling better in general. It isn't a dramatic improvement but it helps enough to keep taking it. I still spend much of the day horizontal with 15-30 minutes upright every 1.5 hours or so. Vitacost link for Red Raspberry powder (90 servings): www.vitacost.com/ultima-health-products-replenisher-balanced-electrolyte-powder-red-raspberry == Ingredients in the Red Raspberry flavor == Calories: 15 Total Carbohydrate: 3 g (1%) Vitamin C (from calcium ascorbate and cili fruit extract): 100 mg (167%) Calcium (as calcium citrate and calcium ascorbate): 25 mg (3%) Phosphorus (as potassium phosphate): 15 mg (2%) Magnesium (as magnesium citrate and magnesium aspartate): 8 mg (2%) Zinc (as zinc citrate): 1 mg (7%) Selenium (as selenium amino acid chelate): 1.25 mcg (2%) Copper (as copper citrate): 0.2 mg (10%) Manganese (as manganese citrate): 0.2 mg (10%) Chromium (as chromium dinicotinate glycinate): 5 mcg (4%) Molybdenum (as sodium molybdate): 3.5 mcg (5%) Chloride (as sodium chloride): 7.5 mg (<1%) Sodium (as sodium chloride): 5 mg (<1%) Potassium (as potassium aspartate and potassium phosphate): 75 mg (2%) Stevia Leaf Extract 60 mg Cranberry fruit extract 50 mg Other Ingredients: Non-GMO maltodextrin, stevia leaf extract, natural flavors, citric acid, malic acid, beet color, silica and luo han guo fruit extract.