Tired, anxious, gaining weight? It could be your hormones | Dr Helen O’Neill

March 5, 2026·57 min·1 clip

Key insight from segment 5

Zoe Science & Nutrition frames hormones as the body's invisible orchestra. Dr Helen O'Neill joins to explain how energy, appetite, and overall health can shift when one part of that system drifts out of balance. The episode points to stress, disrupted sleep, highly processed food, and everyday chemical exposures as common pressures on hormonal regulation. It also notes that symptoms can show up before anything looks obviously out of range on a test, which is why the discussion keeps circling back to homeostasis. Rather than treating hormone balancing as a quick hack, the conversation stays clear-eyed about how tightly regulated the system is and how easy it is for fixes to get oversold. That leaves room for a more grounded point: lifestyle changes can still matter a great deal, because the body is always reacting to the signals it receives. When the discussion turns to weight gain, the show does not wave the connection away. Instead, it talks about adipogenesis and the way fat tissue can send signals back to the brain that shape eating and energy use. PCOS becomes the clearest example of that feedback loop getting messy. The episode says it affects about one in ten women and treats it as a metabolic condition with multiple moving parts. Brain, ovaries, and fat cells all enter the picture at once. That is why the host describes it as a three-body problem, where one signal becomes hard to track once the other two start shifting as well. The interview structure stays patient and explanatory throughout. Questions help translate technical ideas into ordinary life, whether the topic is breakfast or the kinds of habits that build up quietly over time. O'Neill's answers keep the focus on mechanisms rather than slogans. The result is a discussion that treats hormone talk as a science problem first and a lifestyle question second. It stays careful about certainty. When the evidence is messy or the system is too interconnected for a simple answer, the episode says so. That makes the conversation useful for listeners who want nuance without losing the practical thread. It leaves them with a more grounded way to think about symptoms they may have been normalizing for too long.

As heard by us

A clear explanation of how hormones influence energy, metabolism, hunger, and overall health.

It presents hormones as a body-wide signaling system, with more than 50 of them working together to shape energy, metabolism, hunger, and overall health.

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Why you'd press play

When your energy, mood, and weight all feel off, this gives you a sane starting point.

Read the full recommendation in PlayNext →

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