The Kavena Standard
Every claim on this website is checkable. This page explains how.
Certificates of Analysis
Every batch we manufacture is sent to an independent UK laboratory and tested for heavy metals, mycotoxins, microbial contamination, and pesticide residue. The results are published here as a PDF, indexed by batch number.
The batch number is printed on the base of your tin. Match it to the list below to read the report for the exact tin in your kitchen.
Certificates are published as each batch clears testing.
Authorised health claims
UK law permits only specific, pre-authorised health claims for food supplements. We use these and nothing more:
- Magnesium contributes to the normal functioning of the nervous system.
- Magnesium contributes to the reduction of tiredness and fatigue.
- Magnesium contributes to normal psychological function.
- Vitamin B6 contributes to normal psychological function.
- Vitamin B12 contributes to normal functioning of the nervous system.
- Folate contributes to normal psychological function.
Anything else you read on this site is either a description of an ingredient, a citation of published research, or a customer describing their own experience. We never claim to treat, cure, or prevent anything.
The research
- Salve et al. (2019), Cureus — KSM-66 ashwagandha at 300 mg and serum cortisol over eight weeks.
- Nobre et al. (2008), Asia Pacific Journal of Clinical Nutrition — L-theanine at 200 mg and alpha-wave activity.
- Yamadera et al. (2007), Sleep and Biological Rhythms — glycine at 3 g, subjective sleep quality and sleep onset latency.
- Boyle et al. (2017), Nutrients — magnesium supplementation and stress-induced anxiety.
- Panossian et al. (2010), Phytomedicine — Rhodiola rosea at 200 mg and mental fatigue.