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
Calm under pressure, steadier energy and better sleep when stress is wearing you down. Magnesium settles the nervous system, ashwagandha takes the edge off over weeks, L-theanine gives calm focus within the hour, and the B vitamins keep energy steady.
Why these
Magnesium Bisglycinate Capsules: Calms the nervous system and supports sleep under stress. The gentle form; give it six to eight weeks.
Ashwagandha: Takes the edge off stress and supports steady energy. An adaptogen root that builds over weeks.
L-Theanine Capsules: Calm focus without drowsiness, in minutes. The amino acid from green tea.
B Complex Liquid: Supports the nervous system and steady energy when stress is draining you. All eight B vitamins, methylated.
Adrenalmax: Supports energy and resilience without stimulants: B vitamins, glutamine and adaptogens in one capsule.
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.
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.