Find Your Why: the Standard American Diet

The talk

Find Your Why: Understanding the Impact of the Standard American Diet was delivered on 29 May 2025 as part one of a three-part grand rounds series at White River Health. Dr. Luebker declared no disclosures and no industry support for any part of the series. She opens by saying that her own motivation is her family's health, and she asks the audience to identify what theirs is before working through the science.

The framing is deliberate rather than sentimental. A clinician who understands the biochemistry but has no personal reason to change their own habits tends not to change them, and the same is true of the patients they counsel. The talk is built for physicians, residents, and advanced practice clinicians across specialties.

What it covers

The first half works through the difference between what the United States spends on health and what it gets for the money, then moves to macronutrients and to insulin resistance. Dr. Luebker covers how insulin resistance begins with an energy surplus, how it differs between tissues, and how fat accumulates when intake runs above what the body uses. She then goes deeper into the biochemistry of the fed and fasted states, including glucose handling, fat formation, ketone production, and how fructose is metabolized differently from other sugars.

The second half turns to food additives and to what regulatory approval does and doesn't establish. The Generally Recognized as Safe designation gets particular attention, because the assumption that a shelf-stable product has been tested for long-term safety doesn't hold as reliably as most people expect. She credits the work of researchers and advocates in metabolic medicine throughout, and the deck includes a full reference list.

Reading a metabolic panel

The closing section is the most directly useful part for anyone seeing patients. It works through blood pressure, waist circumference, a worked lipid panel, fasting insulin, triglycerides, HDL, liver function, fasting glucose, uric acid, hemoglobin A1c, vitamin D, and high-sensitivity CRP. Dr. Luebker argues that fasting insulin deserves more attention than it usually gets, because hyperinsulinemia is measurable well before glucose becomes abnormal.

The section uses a practice patient and asks the audience to interpret the panel before she does. That structure works better than a list of reference ranges, because it exposes how much a normal-looking lipid panel can conceal. She returns to the same patient at the end after reframing the risk.

Watch it

The recording is published on her YouTube channel as The Metabolic Crisis: Why We're Getting Sicker. That published title was written for a general audience rather than for a grand rounds listing, so it doesn't match the title at the top of this page. The content behind it is the talk described here, in full and unedited.