Proco has two products that relate to everyday stress. Magnesium Glycinate gives a fully disclosed 275mg of magnesium per serving. Sleep Support is a night-time blend that includes ashwagandha root, along with 10mg of melatonin and St John's Wort. Its ashwagandha is plain root, not KSM-66 or another standardised extract used in most trials.
The evidence for both is modest. If stress is stopping you from coping, or will not go away, talk to a doctor rather than reaching for a supplement.
This page is written for US readers. Sleep Support contains melatonin, which is prescription-only in Ireland and the UK.
Each three-capsule serving gives 275mg of elemental magnesium from 2,500mg of magnesium glycinate. It is our simplest product: one active, one number.
What the stress research shows, honestly:
So far, there is no strong placebo-controlled evidence that magnesium reduces stress. Our explainer on what magnesium can and can't do for stress goes further.
Cautions. The US National Institutes of Health sets an upper limit of 350mg a day of magnesium from supplements for adults. Magnesium Glycinate gives 275mg. High intakes can cause diarrhoea, nausea and cramping, and the risk of too much is higher with kidney problems. Magnesium can affect how some antibiotics and osteoporosis medicines are absorbed. Some diuretics and long-term acid-reflux medicines can change magnesium levels. See how much magnesium is too much.
Here is exactly what you get. Sleep Support's label lists ashwagandha (Withania somnifera) root inside a 905mg blend of 14 ingredients. It is root powder, not KSM-66, Sensoril or another named, standardised extract. Its dose is not disclosed, and our manufacturer has told us it cannot be published.
That matters because most ashwagandha trials tested concentrated extracts at stated doses:
We cannot claim Sleep Support delivers what those trials tested. It is also a night-time product with 10mg of melatonin, so it is not a daytime stress option. Our article on why the extract matters more than the herb explains the difference.
Ashwagandha cautions. The NIH says ashwagandha may be safe for up to three months; long-term safety is unknown. Rare cases of liver injury have been linked to it. It should be avoided in pregnancy and while breastfeeding. It is not recommended before surgery, or for people with autoimmune or thyroid conditions. It may interact with medicines for diabetes, blood pressure, seizures and thyroid conditions, and with sedatives and immunosuppressants.
St John's Wort and other interactions. Sleep Support also contains St John's Wort. The NIH warns it can interact in dangerous, sometimes life-threatening ways with many medicines. These include birth control pills, warfarin, ciclosporin, some antidepressants and some seizure and HIV medicines. Sleep Support's label also warns about 5-HTP with antidepressants and migraine triptans. If you take any prescription medicine, talk to your doctor or pharmacist first. See Proco products and mental health medications.
Never take Sleep Support with our Sleep Formula. Together they give 12mg of melatonin, three times the roughly 4mg a day where research found melatonin's effect peaks.
US orders ship free, and a 90-day money-back guarantee covers your first order.
Our guide to managing stress without medication covers approaches that do not involve a supplement.
The US National Institute of Mental Health advises talking to a professional if you are struggling to cope, or if your symptoms will not go away. For anxiety, talking therapy and medication are the two main treatments, and many people benefit from both. Supplements are not a replacement for either.
If you are in immediate distress or thinking about hurting yourself:
No. It is ashwagandha root, not KSM-66 or Sensoril. Most of the trials behind ashwagandha's reputation used those standardised extracts at stated doses. Ours is in an undisclosed blend.
The label says three capsules once a day and does not specify a time. Our article on the best time to take magnesium glycinate covers the options. Keep in mind the stress evidence for magnesium is weak.
Talk to your doctor or pharmacist before you do. St John's Wort can weaken birth control pills and interacts with some antidepressants. Sleep Support also contains 5-HTP and L-tryptophan, which can add to the effects of serotonin-affecting medicines.
Sleep Support adds 13mg of magnesium, so together they give 288mg. That is under the NIH's 350mg upper limit for supplemental magnesium. Check with your doctor or pharmacist about Sleep Support's other ingredients first, especially if you take any medicine.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.
This page is general information, not medical advice. Talk to your doctor or pharmacist before starting a supplement, especially if you take medication, are pregnant or breastfeeding, or have a health condition.
Last updated: November 2026