Guides

Vitamin D in the UK: Who Needs It and When? | Onyx Nutra

Vitamin D in the UK: Who Needs It and When?

From October to March the UK sun is too weak for your skin to make vitamin D. Here's who needs a supplement, how much the NHS recommends, and how to...

Vitamin D in the UK: Who Needs It and When?

From October to March the UK sun is too weak for your skin to make vitamin D. Here's who needs a supplement, how much the NHS recommends, and how to...

Evening habits for better sleep | Onyx Nutra

10 Evening Habits for a Better Night's Sleep

Ten simple evening habits that make a real difference to sleep, from caffeine cut-offs to the ideal bedroom temperature.

10 Evening Habits for a Better Night's Sleep

Ten simple evening habits that make a real difference to sleep, from caffeine cut-offs to the ideal bedroom temperature.

Ashwagandha side effects | Onyx Nutra

Ashwagandha Side Effects: Who Shouldn't Take It

Ashwagandha isn't for everyone. Common side effects, rare liver risks, medicine interactions, and exactly who should avoid it.

Ashwagandha Side Effects: Who Shouldn't Take It

Ashwagandha isn't for everyone. Common side effects, rare liver risks, medicine interactions, and exactly who should avoid it.

Valerian root for sleep | Onyx Nutra

Valerian Root: Does It Help You Sleep?

Valerian root has centuries of traditional use. Here's an honest look at the research, how people take it, side effects and who should avoid it.

Valerian Root: Does It Help You Sleep?

Valerian root has centuries of traditional use. Here's an honest look at the research, how people take it, side effects and who should avoid it.

Magnesium for sleep | Onyx Nutra

Magnesium for Sleep: Best Form, Dose and Timing

Glycinate, citrate or oxide? Which magnesium suits an evening routine, how much to take and when, and an honest look at what the research says.

Magnesium for Sleep: Best Form, Dose and Timing

Glycinate, citrate or oxide? Which magnesium suits an evening routine, how much to take and when, and an honest look at what the research says.

Tired while losing weight | Onyx Nutra

Why You Might Feel Tired While Losing Weight

Tired while losing weight or on a GLP-1? The common causes, the nutrients linked to energy, simple quick wins, and when it's time to see your GP.

Why You Might Feel Tired While Losing Weight

Tired while losing weight or on a GLP-1? The common causes, the nutrients linked to energy, simple quick wins, and when it's time to see your GP.