Why Your Rhythm and Flow Matter
As the days grow shorter and the light softens, many of us start to feel a shift not just in the air but in our bodies too. You might notice changes in your energy, digestion, sleep or cravings. These changes are part of a deeper rhythm your body follows, known as your circadian rhythm. This governs your sleep-wake cycle, hormone release, digestion and immune function.
Winter invites you to realign with this rhythm, to pause and nourish yourself more intentionally
Understanding Circadian Rhythm
Circadian rhythm is shaped by light and daily habits such as sleep, food intake and temperature. In winter, reduced daylight can affect melatonin and cortisol levels, which in turn impact sleep, immunity and mood. Eating meals during daylight hours helps stabilise blood sugar, support digestion and maintain this rhythm. Skipping meals or eating too late can increase inflammation and disrupt digestive balance.
Vitamin D: Your Winter Essential
Low vitamin D is common during winter due to limited sun exposure. It is essential for immune health and supports the regulation of sleep hormones. As a fat-soluble vitamin, it acts more like a hormone and plays a role in immunity, inflammation and mood. It can be difficult to get enough from food alone, especially during colder months or when using sunblock. Supplementing is a practical approach. Ideally, test your levels and speak with a practitioner. Optimal blood levels sit between 60 and 80 ng/mL.
Some clients ask if vitamin D must be taken with vitamin K2. While K2 may support calcium regulation in certain cases, vitamin D on its own is still highly effective. Most major studies use it alone. If you are using Rapid D, you can feel confident it supports your immune, sleep and bone health. For best absorption, take it with a meal containing healthy fat.
Magnesium: Calm from Within
Low vitamin D is common during winter due to limited sun exposure. It is essential for immune health and supports the regulation of sleep hormones. As a fat-soluble vitamin, it acts more like a hormone and plays a role in immunity, inflammation and mood. It can be difficult to get enough from food alone, especially during colder months or when using sunblock. Supplementing is a practical approach. Ideally, test your levels and speak with a practitioner. Optimal blood levels sit between 60 and 80 ng/mL.
Some clients ask if vitamin D must be taken with vitamin K2. While K2 may support calcium regulation in certain cases, vitamin D on its own is still highly effective. Most major studies use it alone. If you are using Rapid D, you can feel confident it supports your immune, sleep and bone health. For best absorption, take it with a meal containing healthy fat.
Gut Health: Feed Your Microbiome
Gut health is also key during winter. Around 70 percent of your immune system is found in the gut, and a diverse, well-fed microbiome supports inflammation regulation and resilience. Probiotic-rich foods like kefir, yoghurt and sauerkraut introduce beneficial bacteria. Prebiotic foods help feed and sustain them.
Common prebiotic foods include:
Leeks, garlic, onions, cooked lentils, oats, asparagus, bananas (slightly green), apples, Jerusalem artichoke, chicory root and dandelion greens. These fibres ferment in the colon and provide food for bacteria, support gut lining health and immune balance.
Some prebiotic foods are high in FODMAPs and may cause bloating in those with IBS or sensitive digestion. Gentler options include oats, firm bananas, cooked apples, asparagus or cooled lentils. Start slowly and monitor your tolerance. If needed, a supplement may be a suitable alternative.
Zinc: A Winter Powerhouse
Zinc is another key nutrient for winter. It supports immune cell activity, tissue repair, wound healing, skin health and inflammation regulation. Zinc also plays a role in mood, hormone balance and even taste and smell. As it is not stored in the body, regular intake is important. Aim for 15 to 30 mg per day through food or supplements to support immune defences and recovery.
Gentle Nutrition for Winter
- Eat your main meals during daylight hours to support digestion and metabolism.
- Include probiotic and prebiotic foods regularly to support gut and immune health.
- Choose warm, grounding foods such as slow-cooked meals, root vegetables, soups, bone broth and herbal teas.
- Include vitamin D daily, ideally with a fat-containing meal.
- Take magnesium before bed to support sleep and nervous system function.
- Make sure you are getting enough zinc through food or supplements to support immune function and tissue repair.
- Prioritise rest and balance by honouring your slower rhythm with quality sleep and gentle movement.
References
Belkaid, Y., and Hand, T. W. (2014). Role of the microbiota in immunity and inflammation. Cell, 157(1), 121–141. https://doi.org/10.1016/j.cell.2014.03.011
Czeisler, C. A., and Gooley, J. J. (2007). Sleep and circadian rhythms in humans. Cold Spring Harbor Symposia on Quantitative Biology, 72, 579–597. https://doi.org/10.1101/sqb.2007.72.064
Froy, O. (2010). Metabolism and circadian rhythms—Implications for obesity. Endocrine Reviews, 31(1), 1–24. https://doi.org/10.1210/er.2009-0014
Gao, Q., Kou, T., Zhuang, B., Ren, Y., Dong, X., and Wang, Q. (2018). The association between vitamin D deficiency and sleep disorders: A systematic review and meta-analysis. Nutrients, 10(10), 1395. https://doi.org/10.3390/nu10101395
Martineau, A. R., Jolliffe, D. A., Hooper, R. L., Greenberg, L., Aloia, J. F., Bergman, P., … and Griffiths, C. J. (2017). Vitamin D supplementation to prevent acute respiratory tract infections: Systematic review and meta-analysis of individual participant data. BMJ, 356, i6583. https://doi.org/10.1136/bmj.i6583
Poggiogalle, E., Jamshed, H., and Peterson, C. M. (2018). Circadian regulation of glucose, lipid, and energy metabolism in humans. Metabolism, 84, 11–27. https://doi.org/10.1016/j.metabol.2017.11.017
