The standard wellness advice is to drink more water. Eight glasses a day. More if you exercise. More still if you live somewhere warm. This is fine as far as it goes, but it misses most of what actually keeps a body well-hydrated, and it produces, in many of the clients I see, a kind of compulsive water-drinking that does not address the underlying problem.
Hydration is not just about volume in. It is about volume retained — whether the water you drink actually stays in the tissues where it is useful, or whether it passes through and gets excreted within an hour. For many people, the second is what is happening, and adding more water just adds more pass-through.
What keeps water in the tissues
Electrolytes. Particularly sodium, potassium, and magnesium. Water without electrolytes is, somewhat counterintuitively, less hydrating than water with them — the body has nothing to bind the water to, and the kidneys flush it through.
The simplest correction: a small pinch of sea salt in the first glass of water of the day. Half a teaspoon over the course of the day, distributed across two or three glasses, is enough for most people. This sounds like very little salt and it is — it is roughly what is in a small bowl of soup. But it changes the hydration math substantially.
Beyond water
Food water counts. Fruits, vegetables, soups, broths — all of these contribute to hydration in ways that pure water does not, because they come pre-bundled with the minerals and the small amount of soluble fibre that helps the body hold onto the water.
A bowl of soup at lunch is more hydrating than two glasses of water with the same total volume. A whole cucumber eaten over the afternoon is more hydrating than the same volume of water sipped from a bottle. This is one of those small facts that turns out to be quite important once you start paying attention.
Skin hydration is different from systemic hydration
This is the part of the topic that the wellness writing usually skips. The skin gets very little of its hydration from water you drink. It gets most of it from the lipid layer it produces itself, and from any topical hydrating layer you apply.
Drinking more water will not, contrary to a great deal of marketing, fix dry skin. What fixes dry skin is a combination of: a good cleansing routine that does not strip the lipid layer, a hydrating layer applied to damp skin after cleansing or showering, and adequate omega-3 intake in the diet. Water is part of the picture but a small part.
A small daily protocol
First thing in the morning, before coffee or anything else: a glass of room-temperature water with a small pinch of sea salt. Sip it over about ten minutes while you do something else. This rehydrates the body after the night, with the salt allowing the water to stay where it is going.
Through the day, water as you are thirsty. Do not force it. The body's thirst signal is, in most cases, reliable if you respect it.
With meals, water or a herbal tea, but not in such volume that it dilutes the digestive process. A small glass with the meal is plenty.
Evening: nothing in the last hour before bed except a small herbal tea if you want one. Drinking a glass of water at bedtime guarantees a middle-of-the-night wake-up.
Drinking more water without electrolytes mostly just produces more bathroom trips. The pinch of salt is the small change that actually matters.
