That 9pm pull toward something sweet, salty, or crunchy isn't a character flaw. It's data. And once you start reading it properly, it stops feeling like a battle you keep losing - and starts feeling like a conversation you can actually have.
Here's the thing: cravings aren't hunger. True hunger builds slowly and, when you're genuinely hungry, almost anything will do. A craving is different. It's specific. It's insistent. And that specificity is exactly the point, because your nervous system doesn't reach for "something salty" by accident.
So what's it actually reaching for?
The Four Pillars Behind Most Cravings
Research consistently points to four areas where the body, when something is off, starts sending craving signals loud enough to hear. Sound familiar?
1. What you're eating (and what you're missing)
Blood sugar instability, under-fuelling, low protein intake and micronutrient gaps can all drive the craving cycle. Refined carbs spike and crash your glucose levels, which prompts the brain to call for fast fuel - and fast fuel tends to mean sugar.
2. How you're moving
Intense or endurance exercise depletes your glycogen (stored carbohydrate in your muscles and liver). Post-workout carb cravings are often a genuine physiological need, not a reward reflex. The distinction matters.
3. How you're sleeping
Research published in the Annals of Internal Medicine found that just two nights of reduced sleep (4 hours) led to an 18% drop in leptin (your satiety hormone) and a 28% rise in ghrelin (your hunger hormone) — alongside a 24% increase in reported hunger. Poor sleep doesn't just make you tired. It rewires what your body asks for.
4. How stressed you are
Chronic stress elevates cortisol, and cortisol specifically drives cravings for high-fat, high-sugar foods. It also overrides the brain's "I'm full" signals - meaning you can eat past the point of need and still feel unsatisfied.
The Two Nutrients Most of Us Are Actually Low In
Once you filter out the noise from ultra-processed foods (which are genuinely engineered to override your body's natural signals and create cravings of their own), some real physiological patterns start to emerge.
Here are the two we see come up most consistently.
The One Behind Your Sugar Cravings
The signal: You want something sweet. You feel tense, wired, or find it hard to switch off. You wake up still tired.
Magnesium is involved in over 300 biochemical reactions in the body - including glucose metabolism, insulin regulation, and the production of serotonin (your mood-stabilising neurotransmitter). When levels drop, blood sugar regulation suffers, and your brain starts hunting for quick energy sources. That often looks like a craving for something sweet.
The cycle is self-reinforcing: low magnesium triggers sugar cravings, but consuming more sugar depletes magnesium stores further. The body also burns through magnesium faster under stress, which means if you're already stretched, you're more likely to be deficient. Luckily, magnesium can also help reduce cortisol.
The modern diet provides roughly 50% of the magnesium we actually need. That's not a niche concern - it's a widespread gap. And the form of magnesium matters. Our Marine Magnesium is sourced from pure seawater, with naturally occurring trace minerals intact. No synthetic isolates. Nothing fishy.
The One Behind Your Mood and Stress Cravings
The signal: You feel flat, foggy, or reactive. You're reaching for comfort foods after a difficult day. Sleep doesn't feel restorative.
Omega-3 fatty acids play a central role in how the brain regulates mood, inflammation, and stress response. When these are low, the brain's reward system becomes more dominant - meaning food, particularly energy-dense food, becomes more compelling.
The cortisol connection is particularly interesting. A double-blind, placebo-controlled trial published in Psychoneuroendocrinology found that participants taking omega-3 for eight weeks showed significantly reduced cortisol awakening responses, as well as reduced emotional exhaustion and burnout symptoms. A separate RCT found that higher omega-3 intake was associated with 19% lower cortisol levels and 33% lower IL-6 (an inflammatory marker) during stress.
In short: omega-3 doesn't just support your heart and joints. It actively dials down the stress and inflammatory signalling that drives craving behaviour in the first place.
Our Algae Omega-3 skips the fish entirely - going straight to the algae that fish eat to accumulate their DHA and EPA. Cleaner source, smaller environmental footprint, and no heavy metal concerns. Just the omega-3 your brain actually needs.
The Sleep-Craving Loop Nobody Talks About Enough
If you've had a run of poor nights, you've probably noticed it: you reach for sweeter, saltier, more energy-dense foods. This isn't a willpower issue - it's hormonal.
A landmark study from the University of Chicago showed that just two nights of restricted sleep elevated hunger by 24%.
Sleep is also when the brain consolidates impulse control. Deprive yourself of it, and the reward centres become more active while the prefrontal cortex (responsible for restraint) becomes less so. The result: food that looked manageable at 9am looks irresistible at 9pm.
Both magnesium and omega-3 have evidence-backed roles in sleep quality. A systematic review found omega-3 supplementation was associated with significantly higher sleep efficiency compared to placebo across multiple clinical trials. Magnesium, through its effect on GABA and cortisol, supports the physiological conditions needed to actually wind down.
Cravings aren't the enemy. They're information. The goal isn't to ignore them - it's to get good enough at reading them that you can actually respond to what's underneath.
References
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Spiegel K, Tasali E, et al. (2004). Brief Communication: Sleep Curtailment in Healthy Young Men Is Associated with Decreased Leptin Levels, Elevated Ghrelin Levels, and Increased Hunger and Appetite. Annals of Internal Medicine. https://www.acpjournals.org/doi/10.7326/0003-4819-141-11-200412070-00008
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Taheri S, et al. (2004). Short Sleep Duration Is Associated with Reduced Leptin, Elevated Ghrelin, and Increased Body Mass Index. PLOS Medicine. https://journals.plos.org/plosmedicine/article?id=10.1371%2Fjournal.pmed.0010062
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Nakamura T, et al. (2024). Effect of omega-3 fatty acids on sleep: a systematic review. Journal of Clinical Biochemistry and Nutrition. https://www.jstage.jst.go.jp/article/jcbn/75/3/75_24-36/_pdf/-char/en
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Pross N, et al. (2019). Omega-3-polyunsaturated fatty acids, compared to placebo, reduced symptoms of occupational burnout and lowered morning cortisol secretion. Psychoneuroendocrinology. https://pubmed.ncbi.nlm.nih.gov/31382171/
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Kiecolt-Glaser JK, et al. (2021). Omega-3 Supplementation and Stress Reactivity of Cellular Aging Biomarkers. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC8510994/
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Su KP, et al. (2024). Efficacy and safety of omega-3 fatty acids supplementation for anxiety symptoms: a systematic review and dose-response meta-analysis. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC11186166/
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Wienecke E, Nolden C. (2016). Long-term HRV analysis shows stress reduction by magnesium intake. MMW Fortschritte der Medizin. https://pubmed.ncbi.nlm.nih.gov/27933574/