Who writes this

My name is Kristen Spang. I am a registered dietitian nutritionist with a master's degree in nutrition, and I work in performance nutrition — which mostly means helping people who train hard eat in a way that supports it, and untangling the advice they arrived with.

Run the Macros exists because of a pattern I kept running into. Someone would show up having done their homework, holding a number from a calculator, and the number would be wrong for them in a way neither of us could diagnose, because the site that produced it never disclosed what it did. Was that a general-population equation applied to someone carrying thirty pounds more muscle than average? Was the activity multiplier assuming a training volume they do not do? There was no way to tell, so the only option was to throw it out and start over. That is a waste of everyone's effort.

So the rule here is that nothing is hidden. Every calculator names its equation, links the paper, and shows your result as a marker inside the published range rather than as a lone figure pretending to precision it does not have. Where I made a judgement call — which equation to default to, how to order protein against carbohydrate when calories run short — it is written down on the methods page so you can disagree with it knowingly.

What this site is and is not

It is general nutrition education, the kind of thing I would say in a group presentation to a room of people I have never assessed. It is not medical nutrition therapy, which means individual assessment, diagnosis-specific intervention and a care plan, delivered by a dietitian licensed in the state where you live. Those are different things with different regulatory footings, and the difference matters.

If you have a medical condition, take medication that affects appetite or metabolism, are pregnant or breastfeeding, are under eighteen, or have any history of disordered eating, please work with a dietitian who can see your whole picture rather than a form on a webpage. The Academy of Nutrition and Dietetics referral directory will find one near you.

How this site pays for itself

Display advertising, and occasionally affiliate links to products mentioned in the articles. I would rather say that plainly on its own page than bury it in a footer, so the full affiliate disclosure sits alongside the medical disclaimer. Nothing on this site is sponsored, no brand has paid for a mention, and no recommendation changes based on whether a link earns anything. If a product is worth recommending it gets recommended; if it is not, it does not appear.

What this site does not do is collect anything from you. No accounts, no email capture, no newsletter popup, and no server ever sees the height and weight you type in. Every calculation happens in your browser. The privacy page explains what the ad network does and does not see.

Getting in touch

If you spot an error, disagree with an interpretation, or think a guideline has been superseded, I want to hear about it — that is the useful kind of email and I read all of it. Corrections get made and the review date on the page gets updated.

Email [email protected]. I cannot give individual nutrition advice by email, and I will not answer questions that amount to asking for a personal plan, because doing that properly requires an assessment and doing it improperly helps nobody.