💊 Best Supplements for Shift Workers
Most supplement marketing is noise. For shift workers, there are a handful of supplements where the evidence is strong enough to justify the cost, and several that are widely sold on promises the research doesn't support. This guide covers the ones worth taking, the ones that might help, and the ones that are probably a waste of money — with UK-specific guidance on forms, doses, and where to buy.
What to look for
We only include supplements with at least some human trial data relevant to shift workers or circadian disruption. Animal studies and in-vitro research are noted but not treated as clinical evidence.
Shift workers are at high risk of vitamin D deficiency — you're asleep when the sun is out. PHE (now UKHSA) recommends all UK adults consider 10µg daily in autumn and winter. For shift workers sleeping days year-round, daily supplementation is worth considering permanently. Choose vitamin D3 (cholecalciferol) over D2.
Magnesium glycinate or bisglycinate has reasonable evidence for improving sleep quality and reducing time to sleep onset. Cheaper forms (magnesium oxide) are poorly absorbed. Typical dose: 200–400mg elemental magnesium, taken 30–60 minutes before sleep.
Melatonin is available over-the-counter in the UK as a food supplement (0.5mg–5mg). It's most useful for shift workers to reset circadian timing on pattern changes, not as a daily sleep aid. Timing matters more than dose: take it at the start of your new desired sleep time, not just before bed.
Proprietary 'shift worker blends', most herbal sleep aids without evidence (valerian has weak data), high-dose isolated B vitamins without diagnosed deficiency, and anything marketed as 'reversing shift work damage'. None of these have adequate clinical evidence.
Our top picks coming soon
We're currently testing and researching specific products for this guide. The criteria above is what we'll be judging them on. Check back soon for our full ranked recommendations.