Unexplained Weight Gain in Lansing, MI
Investigated, Not Lectured

When Weight Changes Without a Clear Reason

Patients arrive here with a particular kind of story. The weight has shifted — often in midlife, sometimes earlier — and the change does not track with what is happening on the food and exercise side. Things that used to work no longer move the needle. The standard advice they have already received reduces what is going on to math: eat less, exercise more. That advice is not wrong, exactly. It is just incomplete, because it skips over the question of why the body's accounting has changed in the first place.

There is real medicine underneath that question, and conventional primary care is rarely built to address it at the depth it needs. A short visit, a screening panel, a "your labs look fine, try to be more active" — and the patient leaves with the same body and a slightly worse sense of being heard. The gap is not anyone's fault; it is what the volume model of primary medicine does and does not have time for. That gap is the territory this page is about.

What "Metabolic" Actually Means

Metabolism is shorthand for several systems running together: how your body makes energy from food, how it stores fuel for later, how hormones signal hunger and fullness, how inflammation gets regulated, and how recovery happens overnight. When weight has shifted in a way that is not adding up, the cause almost always lives somewhere in that machinery rather than in willpower.

The common drivers are knowable. Thyroid function — including the markers screening labs do not usually run — is a frequent contributor. Insulin sensitivity and the way the body handles glucose underneath the visible blood sugar number is another. Cortisol and chronic-stress patterns reshape where fat is stored and how appetite signals work. Sex hormones change measurably in perimenopause, menopause, and andropause, and weight pattern shifts often follow. Sleep deprivation, gut inflammation, and chronic low-grade inflammatory load each have measurable metabolic footprints too. Not all of these apply to every patient; Dr. Eng's role is to figure out which of them apply to yours.

A Root-Cause Approach

The work begins with a real conversation, not a calorie target. Dr. Janet Eng is a board-certified emergency physician with thirty-plus years of clinical experience, fellowship-trained in medical toxicology, with continued training through the University of South Florida Morsani Personalized Medicine Course, A4M, AMMG, IFM, Frequency Specific Microcurrent, and My Injection Training, and currently participating in the AMSKU Ultrasound Fellowship. Her approach to unexplained weight change is the same one she uses for every functional-medicine question: take the full picture, run the labs that go past screening (expanded thyroid, fasting insulin and HOMA-IR, hormone metabolites, inflammatory and micronutrient panels) where the history calls for them, layer in objective metabolic testing when an actual resting calorie burn or body composition number would change the plan, and build something individualized from what the data says rather than from a template.

More about Dr. Eng →

What the First Visit Looks Like

The opening visit is an unhurried functional-medicine evaluation built around the metabolic question. Dr. Eng walks the timeline with you — when the weight change began, what else was changing in your life at the time, what has been tried, the labs and records you already have — and decides what additional testing would actually change the plan. That may mean expanded labs sent out from the office; it may mean a metabolic testing session for objective baselines; it may mean both. The plan that comes out of the visit is paced realistically. Most patients should expect a three-to-six month arc minimum before the metabolic picture starts to settle into something stable.