With the New Year marking the start of many projects and intentions, it’s easy to get swept up in the hustle of wanting to do everything at once. January arrives with motivation to work out, start a new diet or eating plan, get morning sunlight, meditate, practice yoga, and still somehow show up fully for work and family life. There’s a collective sense that this is the moment everything will finally fall into place. Yet research consistently shows that most New Year’s resolutions quietly unravel by February, leaving people feeling as though they’re back at square one. This isn’t because motivation suddenly disappears, but because resolutions are often built on a single moment in time rather than on something physiologically sustainable.
The real reason resolutions tend to fade has far less to do with willpower and far more to do with the balance between dopamine and serotonin. Dopamine is the neurotransmitter that drives novelty, motivation, and the desire to begin something new. It allows us to imagine a different future and gives us the initial push to start. But dopamine is energetically expensive. To produce and sustain it, the brain needs adequate energy in the form of ATP. When stress is high, sleep is compromised, or blood sugar is unstable, dopamine becomes difficult to maintain. Serotonin, on the other hand, supports emotional regulation, stability, and the ability to stay consistent once the excitement wears off. When dopamine surges without enough serotonin to ground it, burnout follows, and when serotonin is depleted, dopamine no longer has a foundation to stand on.
Running out of steam is not a concept I talk about lightly; it’s something I’ve lived. I have young kids, run a busy household, support clients daily, and still try to make space for my own health. Dopamine gets thin very quickly in that reality. While not everyone thinks about life in terms of neurotransmitters and energy molecules, it’s the only way it truly makes sense to me. As a Nutritionist specialising in brain and metabolic health, I notice very clearly that when I am not in ketosis, my dopamine feels depleted more easily. When I am producing ketones and my brain energy is stable, my motivation, clarity, and resilience improve significantly. This isn’t about discipline or mindset, it’s about fuel.
For women, this balance becomes even more nuanced. Estrogen and progesterone don’t replace serotonin and dopamine, but they strongly influence how these neurotransmitters function. Estrogen tends to support serotonergic signaling, while progesterone and its metabolites influence dopamine, GABA, and calm. As hormones fluctuate across the menstrual cycle or during perimenopause, motivation, focus, and emotional resilience fluctuate too. Many women feel driven to start new projects at certain points in their cycle, only to struggle to sustain them later. Understanding these patterns and learning to work with them rather than against them can completely change how sustainable progress feels.
My 12-Week Ketogenic Metabolic Program came to an end last week, and the changes were nothing short of remarkable. Clients lost weight, felt clearer, slept better, and most importantly, made small changes they could actually maintain. But the real work begins now, when they are no longer seeing me each week. Metabolic health isn’t just about weight loss; it’s about how well the brain and body produce energy, regulate stress, support neurotransmitters, and maintain circadian rhythm. Sleep, blood sugar balance, hormones, and nutrition all determine whether dopamine and serotonin can work together rather than compete. Real change doesn’t come from January intensity, it comes from physiology that supports consistency well beyond February.
If you are in Perimenopause or are Post-Menopause and tired of repeating the same cycle every January and want to build habits that actually last, my 12-Week Ketogenic Metabolic Program is designed to support your brain, hormones, and metabolism together. This isn’t about pushing harder, it’s about creating the internal environment where motivation, focus, and consistency can exist without burnout. If you’re ready to move beyond short-term resolutions and into long-term metabolic resilience, this program may be the next step in your journey.
Book a complimentary, 30-minute discovery call with me
I offer a complimentary, no-obligation 30-minute phone call to better understand your health goals and to gauge if I would be the right practitioner to help you. If I am unable to help, I will happily refer you on to another therapist or a GP that would better be suited to your needs.