You have never measured this one.
Deuterium is hydrogen carrying an extra neutron. It is in every glass of water you have ever drunk and in almost everything you have ever eaten, at concentrations that vary far more than most people expect.
This audit estimates the deuterium concentration of what you take in daily, based on published isotope values for common food and water sources. It is an estimate of your intake. It is not a measurement of you.
Send me the full breakdown
A detailed version of this result, with the isotope values behind every input and a plain explanation of where the deuterium in a normal diet actually comes from.
How this number is calculated
Your estimate is a weighted average of two inputs. Drinking water accounts for roughly sixty per cent of the total, because it is the largest single source of hydrogen most people take in by volume. Food accounts for the remaining forty per cent, weighted across protein source, carbohydrate pattern, cooking fats and fruit intake.
Each answer maps to a published or commonly cited isotope value. Standard ocean water sits near 155 parts per million. Tap water varies with latitude and altitude, generally falling lower inland and higher at the coast. Animal products from pasture raised sources are typically measured below 130 parts per million, while grain fed sources are typically above 140. Fats yield metabolic water at a lower concentration than carbohydrates do.
This is an indicative estimate built from typical values, not a laboratory analysis of your diet or your body. Individual foods vary by region, season and producer. If you want an actual measurement, that requires isotope ratio mass spectrometry on a physical sample.