@MummyInTheNecropolis electrolytes are mainly salts whose components (think sodium, potassium, magnesium) have a positive or negative charge when dissolved in water - they are needed for chemical reactions in your body, e.g. muscle contraction, hydration of your cells, nutrient transport etc. A lack of electrolytes can result in headaches, fatigue, brain fog, and lots more - interestingly, diarrhea and vomiting can also be symptoms (I always thought those lead to loss of electrolytes, not that they can be a result of it).
@HeavyHeidi I hear ya', I'm also starting to see a change in my face shape now. What I don't like, though, is the saggy skin that has started to appear! I knew that this would likely be an issue for, but I don't like it, it ages me so much! But at my age (53), it's unfortunately something I might just have to accept. Hmph 😤