The Ticker-Tape: Negative Thoughts & Mitochondria
Why It Matters • Our Cells Are Listening
Growing Place Chico does not prescribe diets or medical treatments. This document is offered for educational purposes only.
Words Matter
Many of us live with a quiet running commentary in the background. It says some version of: I’m not enough; I’m too much; I’m the problem; No one really wants me here; I should have known better. It runs in the morning, between conversations, behind the wheel, and in the dark before sleep. Most of the time we don’t even notice it. It feels like weather — Just there.
What if it isn’t just weather?
Our cells are listening
Inside nearly every cell in your body live tiny structures called mitochondria. You may remember them from biology class as ‘the powerhouse of the cell.’ That’s true. They make the energy your body uses to think, move, repair, heal, and feel. But research over the last decade has shown they do something else too: They listen.¹˙²
When you carry a sustained inner state — chronic worry, shame, self-condemnation, hopelessness — your body translates that state into chemical signals (stress hormones, inflammation signals, nervous system patterns) that reach every cell. Your mitochondria respond. They adjust. Over time, if the signal doesn’t change, they adapt to it. And that adaptation costs something.³˙⁴
Researchers now call this accumulated cost ‘mitochondrial allostatic load’. It’s the cellular bill the body pays for carrying a chronic state.³ The good news embedded in that finding is the same as the hard news: The cells are responsive. What they hear, they adjust to.
What this is not
This is not a claim that one bad thought damages you, or that this defines who you are. People carry the ticker-tape for real reasons, such as what happened to them, what they were told, or what they had to endure. The research is not about blame. It is about understanding that the inner world and the cellular world are not separate. They never were. And, we’re not just passengers, we have a genuine say in both the journey and the destination!
What the downstream looks like
When mitochondria are running under chronic strain, the things they do, such as making energy, supporting repair, regulating mood signaling, keeping the immune system in balance — these all get harder. People describe it in ways that may sound familiar:
A tiredness that sleep doesn’t fully fix.
A foggy quality to thinking that wasn’t there before.
Slower healing from things that used to bounce back quickly.
Mood that feels heavy in a way that doesn’t quite track with circumstances.
A sense of running on fumes, even on quiet days.
A study of caregivers under long-term strain found measurable differences in their mitochondrial health compared to people not under that kind of load.⁵ A study of adults who had experienced heavy childhood adversity found that their immune cells showed mitochondrial signatures decades later.⁶ A 2024 study of human brain tissue found that the kind of psychosocial life a person reports living tracks with the state of their brain mitochondria.⁷ The body keeps a quieter, more accurate record than we realized.
The hopeful part
The same cells that respond to chronic self-condemnation also respond to the opposite. Belonging, safety, attuned relationship, purpose, meaningful work, time in nature, breath, movement, rest, nourishment — these are not luxuries. They are signals your mitochondria read just as carefully as the harder ones. The cells do not require perfection. They require a change in signal.
What if…
Not as a prescription. As a question. Gentle, open, and yours to answer:
What if the voice in your head that has been running for years is not telling you the truth about you?
What if you noticed the scroll today, once, without judging it, and named it for what it is: a habit, not a fact?
What if you took three slow breaths before answering it back?
What if you let one person know what the scroll has been saying lately?
What if you moved your body for ten minutes, not to fix anything, just to give your cells a different signal?
What if you let yourself receive something kind today — a walk, a prepared meal, a moment outside, a steady presence — and noticed what it felt like to receive it?
What if the goal isn’t to win the argument with the ticker-tape, but to make sure it isn’t the only voice your cells hear?
You are not your inner critic. You are not the scroll. You are the one who can begin, in small ways, to change the signal. The cells will do the rest of the work. And, they are eagerly waiting…
References
¹ Picard M, McEwen BS. Psychological stress and mitochondria: a conceptual framework. Psychosomatic Medicine. 2018;80(2):126–140.
² Picard M, Trumpff C, Burelle Y. Mitochondrial psychobiology: foundations and applications. Current Opinion in Behavioral Sciences. 2019;28:142–151.
³ Picard M, Juster RP, McEwen BS. Mitochondrial allostatic load puts the ‘gluc’ back in glucocorticoids. Nature Reviews Endocrinology. 2014;10(5):303–310.
⁴ Bobba-Alves N, Juster RP, Picard M. The energetic cost of allostasis and allostatic load. Psychoneuroendocrinology. 2022;146:105951.
⁵ Picard M, Prather AA, Puterman E, et al. A mitochondrial health index sensitive to mood and caregiving stress. Biological Psychiatry. 2018;84(1):9–17.
⁶ Boeck C, Koenig AM, Schury K, et al. The association between cortisol, oxytocin, and immune cell mitochondrial oxygen consumption in postpartum women with childhood maltreatment. Psychoneuroendocrinology. 2018;96:69–77.
⁷ Kelly C, Trumpff C, Acosta C, et al. Psychosocial experiences are associated with human brain mitochondrial biology. PNAS. 2024;121.