Supplements for stress
Magnesium glycinate, ashwagandha, L-theanine, B complex and Adrenalmax: what the trials say and what to skip.
How to choose a supplement for stress
Stress supplements come down to four ingredients with trial data and a lot of blends around them.
Why these
Magnesium Bisglycinate Capsules: Magnesium contributes to normal psychological function; the anxiety trials ran six to eight weeks.
Ashwagandha: Root extract; the trials measured at 60 days and 8 weeks.
L-Theanine Capsules: L-theanine from green tea.
B Complex Liquid: B vitamins contribute to normal psychological function.
Adrenalmax: The adaptogen and B vitamin complex, with what it contains stated.
What to skip
Anything claiming to fix or balance cortisol. Stress that has lasted more than a few weeks, or comes with low mood, is a GP conversation.
Read the evidence
Magnesium for anxiety and stress: the timeline · How long does ashwagandha take to work?
If you take prescribed medicines, are pregnant or breastfeeding, or have a diagnosed condition, talk to your GP or pharmacist first. Not sure which fits? Ask Nutri365, the Nutri Tailor AI health expert, which checks for interactions and contraindications.
Written by Nutri Tailor from the Health Reference Library. Last checked 6 September 2026. General information, not personal advice.
Common questions
How long does magnesium take to work for stress?
Weeks rather than days, if it works at all. The fair test is six to eight weeks at 200 to 400 mg a day, and the trial evidence is rated low quality.
How long does ashwagandha take to work?
Weeks, not days. The trials measured at 60 days and at 8 weeks.
Can a supplement fix cortisol?
No product on this page claims to, and none has an authorised claim to. Stress that has lasted more than a few weeks, or comes with low mood, is a GP conversation.
Written by Nutri Tailor from the Health Reference Library. Last checked 6 September 2026. General information, not personal advice.