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5-HTP Plus 75mg Formula, 60 Veg Caps

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5-HTP with pyridoxal 5-phosphate and L-Tyrosine, L-Glutamine to help balance mood.


  • Mood

Feature Ingredients 

  • 5-HTP Plus Formula capsules contain 75 mg of natural L-5-hydroxytryptophan (5-HTP) extracted from seeds of the Griffonia simplicifolia 5-HTP helps to promote healthy mood balance.

Serotonin, an important brain neurotransmitter, is key in the regulation of mood.

  • Serotonin is unable to cross the blood-brain barrier and is therefore synthesized in the brain.
  • Tryptophan, an essential amino acid, is a precursor for the synthesis of serotonin. Tryptophan crosses the blood-brain barrier and is converted to L-5-hydroxytryptophan, which in turn is converted into serotonin.
  • As a metabolic amino acid intermediate in the conversion of tryptophan into serotonin, 5-HTP can also serve as a precursor of serotonin. 5-HTP crosses into the brain more readily than tryptophan as it does so without competition for uptake. 5-HTP exerts its beneficiary effects to promote healthy mood balance by increasing serotonin production, which in turn decreases excitatory hormones in the brain including dopamine and noradrenaline.
  • The amino acids tyrosine and glutamine help to support additional adrenal gland and mood neurotransmitters.
  • Tyrosine is the precursor to the adrenal hormones epinephrine and norepinephrine as well as dopamine and the thyroid hormone thyroxine. Dopamine may promote deep thinking and improve memory while thyroxine helps metabolism. Melanin, the skin and hair pigment is also derived from this amino acid.
  • Glutamine helps to support mood and increase mental alertness.

Serving Size: 1 Vegetarian Capsule

Servings per Container: 60

Medicinal Ingredients

Each Capsule Contains

L-5-HTP (L-5-hydroxytryptophan from

Griffonia simplicifolia seed)/ L-5-HTP                         75 mg

L-Tyrosine                                                                   25 mg

L-Glutamine                                                                25 mg

Vitamin B6                                                                  5.3 mg

Non-Medicinal Ingredients

Cellulose, hypromellose (capsule), silica.


Contains No Added: artificial colours, preservatives, or sweeteners.

Recommended Use 

Adults 19+: Take 1 capsule 1-3 times daily with food or as directed by your healthcare practitioner. To minimize the risk of gastrointestinal side effects, start dosing at 1 capsule twice per day and slowly increase to 1 capsule thrice daily. Use for a minimum of 1 week to see beneficial effects. Consult your healthcare practitioner for use beyond 1 year.

Douglas Advantage 

For over 60 years, Douglas Laboratories has been dedicated to meeting the needs of healthcare professionals and is recognized as a leader in the development of high quality, science-based, innovative nutritional supplements across 12 health functions that support healthy lifestyles. As the industry leader and pioneer in private label solutions, Douglas Laboratories can also help you seamlessly create your own uniquely branded product portfolio to meet the needs of your practice. Discover how Douglas Laboratories can help your patients push their potential of healthier living, today and in the future.


Do not use if you are hypersensitive or allergic to any of the ingredients. Do not use if you have scleroderma.


Consult a health care practitioner prior to use if you are taking any medications (especially carbidopa or drugs/supplements with serotonergic activity; these may include, but are not limited to, L-tryptophan, S-adenosylmethionine (SAMe), St. John's wort, antidepressants, pain killers, over the counter cough and cold medication containing dextromethorphan, anti-nausea medication and anti-migraine medication) or if you have any pre-existing condition or symptoms including but not limited to if you are pregnant, breastfeeding, on a low protein diet. Discontinue 2 weeks prior to any scheduled surgery. 

Side Effect Risks 

Discontinue use and consult a healthcare practitioner if symptoms persist, worsen or you develop any reactions which may include allergy or intolerance, signs of weakness, oral ulcers, abdominal pain accompanied by severe muscle pain, skin changes, drowsiness, and or digestive symptoms (nausea, vomiting, or diarrhoea). Exercise caution if operating heavy machinery, driving a motor vehicle or involved in activities requiring mental alertness. Keep out of reach of children. Sealed for your protection. Do not use if seal is broken. For freshness, store in the refrigerator.


The information and product descriptions that appear on this website are for information and educational purposes only and are not intended to provide or replace medical advice to individuals from qualified health care professionals. Consult your physician if you have any health concerns, and before initiating any new dietary, exercise, supplements or other lifestyle changes.