Issue #170: Should you change your supplements for winter?
Live Well Journal Issue #170: Should you change your supplements for winter? Most of us settle into a supplement routine and stick with it year-round without a second thought. Same products, same doses, same shelf in the bathroom or kitchen if you’re me. And while consistency matters, the research is increasingly clear: winter creates specific nutritional demands that your summer stack simply doesn’t account for. Jan Owen AM Co-founder, Be Well Hawthorn PUBLISHEDJune 21, 2026 Read time Most of us settle into a supplement routine and stick with it year-round without a second thought. Same products, same doses, same shelf in the bathroom or kitchen if you’re me. And while consistency matters, the research is increasingly clear: winter creates specific nutritional demands that your summer stack simply doesn’t account for. Less sunlight. More indoor time. Higher stress on the immune system. Disrupted sleep. Hormonal fluctuations are amplified by cold and darkness. The right supplements, taken in the right amounts at the right time of year, can make a meaningful difference. So if you also take supplements, here is what I am going to do with my winter supplements, which you may find useful regarding what to keep, what to increase, and what to add. NOTE: I am not a doctor, this is not advice, this is just what I am going to do. My foundation stays My husband David and I have been really happy with Dr Brad Stanfield’s Multi Vitamin plus and Sleep capsules (melatonin and magnesium) as our core longevity stack. These stay regardless of the season. In addition, I also take: Omega-3 (fish oil or algae-based) is a cornerstone for cardiovascular health, brain function and inflammation regulation. Winter typically means less fresh fish, more inflammatory comfort food and less outdoor movement, all of which raise systemic inflammation. A daily dose of 1,000–2,000mg EPA/DHA maintains my baseline. Probiotics, about 70% of my immune system lives in my gut, and winter is when I need that defence working hardest. A 2025 randomised controlled trial found that women aged 45–65 taking a daily probiotic for four months showed significant improvements in wellbeing and anxiety. A separate meta-analysis found that certain lactobacillus strains may help prevent bone loss in the spine, particularly relevant for women post-menopause. I have a multi-strain formula. I take it consistently. GlyNAC (Glycine + N-Acetylcysteine) research suggests that glutathione, the body’s master antioxidant, is maintained well until around 45 and then declines rapidly. GlyNAC directly replenishes glutathione precursors. A human placebo-controlled trial found it corrected glutathione deficiency in older adults and improved grip strength. Dial up for winter Vitamin D3 is the single most important winter adjustment for almost everyone in Australia’s southern states, and especially for women over 40. Suboptimal vitamin D is extremely common during winter, and declining oestrogen makes absorption less efficient, compounding the problem. Low D3 impairs immune cell function, raises depression risk, weakens bone density and reduces muscle strength. Here’s the critical thing: you don’t take D3 without K2. Vitamin D increases calcium absorption but without K2 (menaquinone), that calcium can end up in arteries and soft tissue rather than bones. Research shows that D3 and K2 taken together produce significantly greater improvements than either supplement alone. This combination is especially important if bone health is a concern. Winter dose: 2,000–4,000 IU of D3 daily, paired with 100–200mcg of K2 (MK-7 form). I haven’t had my levels tested recently, so winter is an excellent time for a simple blood test. The 2026 Winter edition Zinc earns its place during cold and flu season. A 2024 Cochrane review found zinc lozenges reduced cold duration by approximately two days. More importantly, research published in Cell confirmed that immune T-cells require adequate zinc to recognise and fight threats effectively and most women over 50, like me, are mildly deficient without knowing it. 15–25mg daily through winter is appropriate for most women. Note: zinc and copper compete for absorption, so I must avoid very high doses long-term without guidance. Vitamin C evidence for immune support is solid. It drives production of white blood cells, maintains the mucous membranes that are our first physical barrier against viruses, and acts as an antioxidant when our immune system is working overtime. I will take highly absorbable Vit C Liposomal, which enters the bloodstream directly for maximum potency and cellular delivery. It also promotes healthy connective tissue and collagen formation. At 1,000mg daily through winter, it’s within the safe and effective range. Ashwagandha is worth considering if winter hits my stress and energy levels hard. As an adaptogen, it regulates cortisol, the stress hormone that rises with cold, dark winters and disrupted sleep. Multiple trials show it reduces perceived stress, improves energy and supports sleep quality. 300–600mg of a root extract standardised to withanolides, taken in the evening, is the researched dose. Btw, the latest on NMN I took NMN for 3 years as part of my longevity stack as a NAD+ booster, however, current evidence states that while NMN reliably raises NAD+ levels in the blood, a 2025 meta-analysis pooling 10 randomised controlled trials in adults over 60 found no clear evidence that this translates to meaningful health or longevity benefits in humans. The mice data is interesting. The human data is not yet there. There is also a theoretical concern: cancer cells consume NAD+ at very high rates. Without a confirmed benefit, an increasingly common view in evidence-based longevity medicine is that the risk profile isn’t justified by the current evidence. One last thing …. Supplements are not a replacement for good food, movement or sleep, but as a complement to a solid lifestyle foundation. For me, they genuinely improve my energy, mental health and clarity. If you take medications or have a chronic health condition, check with your GP or integrative health practitioner before adjusting your regime as some supplements interact with common medications, particularly blood thinners and thyroid drugs. My takeaway? My body definitely has different needs in winter. Meeting them isn’t complicated, but it needs to be intentional. A few targeted additions to my daily routine, always grounded in evidence, meaningfully support my immunity, mood, bones
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