Theanine / Magnesium / Melatonin Capsules

Available Dosage Strengths

100 mg / 100 mg / 12 mg

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Product Overview

The combination of theanine, magnesium and melatonin may facilitate relaxation, decrease stress and facilitate better sleep.

Theanine1-4

Theanine, a non-protein amino acid, was discovered in green tea in 1949. It can be also found in other teas including black and white tea and certain mushrooms. Theanine has structural similarity to the neurotransmitters glutamine and gamma aminobutyric acid (GABA). It shares the ability of these to cross the blood brain barrier. It has a caramel flavor and helps to alleviate the bitter taste of caffeine. In addition, it is thought to have many pharmacological properties including the following: antioxidant, anti-inflammatory, neuroprotective, anti-cancer, anti-anxiety, metabolic, heart, liver and kidney protective, and immune effects.

Magnesium5-7

Magnesium, the second most abundant intracellular cation, is a cofactor in numerous enzymatic reactions in the body. The electrolyte facilitates energy metabolism and protein and nucleic acid synthesis. Magnesium is thought to relax smooth muscles, and it is critical when replacing low potassium and calcium levels, treats eclampsia, helps to relieve constipation, manage arrhythmias, and help with relaxation of bronchial smooth muscle for asthma patients. It also may help to improve mood and improve sleep quality.

Melatonin8-10

Melatonin, a neurohormone, has been used to regulate circadian rhythm. Melatonin has been used in jet lag and sleep disorders, irregular sleep-wake disorders, shift-work disorders and non-24-hour sleep disorders in adults.

Theanine1-4

Theanine activity supports many different mechanisms of activity. As an antioxidant, theanine decreases reactive oxygen species development and increases the activity of antioxidant enzymes to decrease oxidative damage. As an anti-inflammatory, theanine decreases proinflammatory factors, including cyclooxygenase-2, prostaglandin E2, nitric oxide synthase, and nitric oxide. Theanine has been shown to be neuroprotective stimulating the release of glutathione. In addition, theanine has been shown to have a relaxing effect and help induce sleep and sleep duration. It increases GABA, serotonin, and dopamine to affect mood regulation. Thus, there is evidence to show that it has a role in helping depression and stress, as well as emotional and cognitive function. Theanine has been shown to increase cancer cell apoptosis and decrease cancer cell growth, decrease liver cirrhosis, decrease nephrotoxicity, and decrease vascular remodeling.

Magnesium5-7

Magnesium is a cofactor in ATP-dependent sodium-potassium pumps found in muscle membranes. Correction of low potassium often requires replacement of not only the potassium but also magnesium. Magnesium is also used to decrease calcium uptake and decrease potassium efflux in cardiac cells.

For asthma, magnesium decreases the uptake of calcium by smooth muscle in the lung. It may also decrease mast cell degranulation which will decrease inflammatory mediators. Magnesium also increases nitric oxide and prostacyclin synthesis, which may decrease asthma severity.

For sleep, magnesium may help with neurotransmitter regulation by helping balance of the amounts of GABA and glutamate, modulate cortisol, support melatonin synthesis and help with muscle relaxation and nervous system support.

Melatonin8-10

Melatonin production is generated from the conversion of tryptophan. Tryptophan is converted to serotonin and then subsequently to melatonin. The neurohormone is synthesized and secreted in the pineal gland. The suprachiasmatic nuclei in the hypothalamus maintains the circadian rhythms in the body including rest and activity from photic input. Synthesis and secretion of melatonin is activated by darkness and decreased via light. During jet lag or circadian rhythm disorders endogenous melatonin is not secreted. Administering exogenous melatonin helps to reset behavioral sleep patterns. It may also facilitate sleep.

Common side effects include:

Theanine2

  • Headache
  • Sleepiness

Magnesium (with increased magnesium levels)5

  • Flushing, diaphoresis, hypotension, depressed deep tendon reflexes, muscle paralysis, weakness

Melatonin8

  • Headache
  • Somnolence

Contraindications2,5,8

  • Known hypersensitivity or intolerance to theanine, magnesium or melatonin

Precautions2,5,8

Theanine

  • Patients who take blood pressure medications or who have hypotension

Magnesium

  • Patients with renal disease
  • Patients with AV block

Melatonin

  • Patients being treated for a psychiatric condition or neurological disease, such as a seizure disorder

Store in a cool, dry place between 20–25°C (68–77°F). Keep away from moisture, heat, and direct sunlight. Keep out of reach of children. Follow any additional storage guidelines on the manufacturer’s label.

  1. Dashwood R, Visioli F. l-theanine: From tea leaf to trending supplement – does the science match the hype for brain health and relaxation? Nutr Res. 2025 Feb;134:39-48.
  2. Theanine-Uses, Side effects, and more. https://www.webmd.com/vitamins/ai/ingredientmono-1053/theanine#overview. Accessed July 20, 2025
  3. Li MY, Liu HY, Wu DT, Kenaan A, Geng F, Li HB, Gunaratne A, Li H, Gan RY. L-Theanine: A Unique Functional Amino Acid in Tea (Camellia sinensis L.) With Multiple Health Benefits and Food Applications. Front Nutr. 2022 Apr 4;9:853846.
  4. Priya A. J., Lakshminarayanan A., Devi R. G, Ganesh M.K,Kumar S. A detailed approach on the health benefits of L-theanine. Biomedicine: 2019; 39(3): 394- 399.
  5. Clinical Pharmacology Magnesium clinical monograph 2025 https://www.clinicalkey.com/pharmacology/
  6. Allen MJ, Sharma S. Magnesium. StatPearls. February 20, 2023. Accessed August 9, 2025. https://www.ncbi.nlm.nih.gov/books/NBK519036/
  7. Magnesium Benefits:Evidence-Based Use in Stress Reduction. March 24, 2025. https://medclinres.org/magnesium-benefits/ Accessed August 9, 2025.
  8. Clinical Pharmacology Melatonin clinical monograph 2025 https://www.clinicalkey.com/pharmacology/
  9. Savage RA, Zafar N, Yohannan S, Miller JMM. Melatonin. StatPearls. February 9, 2024. Accessed August 9, 2025.
  10. Zhang Y, Chen C, Lu L, Knutson KL, Carnethon MR, Fly AD, Luo J, Haas DM, Shikany JM, Kahe K. Association of magnesium intake with sleep duration and sleep quality: findings from the CARDIA study. Sleep. 2022 Apr 11;45(4):zsab276.

This information is for educational purposes only. This compounded product has not been reviewed, approved, or evaluated by the Food and Drug Administration for safety and effectiveness. This product is not intended to diagnose, treat, cure, or prevent any disease. No claims are made regarding treatment, cure, or prevention of any disease or condition.

This information may not cover all possible drug information about this product. Call your doctor for medical advice and/or about side effects. You may report side effects to the FDA at 1-800-FDA-1088.  A Wells Pharmacy Network pharmacist will be happy to answer any questions. For consultation, please call 1-800-622-4510.

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