Douglas Laboratories

Sereniten Plus

$58.00

SIZE: 60 Capsules

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The Promise

Calming combo in one capsule — clinically referenced ingredient forms*

A daily vegetarian capsule delivering a milk‑derived bioactive peptide, L‑theanine and vitamin D3.

Key active ingredients

Each capsule contains 175 mg Lactium® (casein decapeptide), 50 mg L‑Theanine (Suntheanine®) and 100 IU vitamin D3.

Vegetarian delivery

Active compounds come in a hydroxypropylmethylcellulose vegetarian capsule with cellulose and silica excipients.

Allergen & additive profile

Formulation contains milk protein and no yeast, wheat, gluten, corn, sodium, sugar, artificial coloring, preservatives or flavoring.

Single‑capsule daily dosing

Designed for a once‑daily adult dose to provide the specified ingredient amounts in one capsule.

Why It Works

How these ingredients are specified — ingredient forms, actions and roles

The formulation uses defined proprietary forms and targeted nutrient roles backed by mechanistic descriptions.

01

Lactium® specificity

Lactium® is an alpha‑S1 casein decapeptide sourced from cow’s milk specified at 175 mg per capsule.

02

GABA‑A interaction described

Lactium® binds the benzodiazepine site of the GABA‑A receptor and does not bind the PBR site associated with benzodiazepine sedation.

03

L‑Theanine source and effect

L‑Theanine is provided as Suntheanine® at 50 mg and is noted to increase alpha‑wave production associated with relaxation.*

04

Vitamin D3 functional role

Vitamin D3 is included at 100 IU for additional support of immune function and other vitamin D roles.*

Reviews

Customer Reviews

Your Journey

Using it safely and simply — practical dosing, precautions and fit

Clear guidance on how to take the product, who should avoid it, and other practical notes.

Daily use

Take one capsule daily

Adults take 1 capsule daily on an empty stomach or as directed by your healthcare professional.

Critical selection & safety

Do not use if pregnant, breastfeeding, or milk‑allergic

Do not use if you are pregnant, breastfeeding or allergic to milk protein.

Dietary suitability

Vegetarian capsule

Contains a hydroxypropylmethylcellulose vegetarian capsule and lists no yeast, wheat, gluten, corn, sodium, sugar, artificial coloring, preservatives or flavoring.

Quantity per bottle

60 capsules per bottle

Sold as 60 capsules.

Product education

Suggested Use: Suggested Usage: As a dietary supplement, adults take 1 capsule daily on an empty stomach or as directed by your healthcare professional. Warning: Do not use if you are pregnant, breastfeeding or allergic to milk protein. Consult a healthcare practitioner prior to use if you are taking antidepressant and/or anxiolytic medications.

Sereniten Plus – Sereniten Plus is a combination of Lactium® casein decapeptide, L-Theanine and Vitamin D to support the Hypothalamic-Pituitary-Adrenal (HPA) axis and feedback loop for metabolic support, stress management and cortisol regulation.† Lactium® and L-Theanine have been shown to provide a calming effect and may support normal sleep that is affected by stress.†
The neurochemical and hormonal reactions to stress are regulated through the Hypothalamic-Pituitary-Adrenal axis (HPA axis) designed for acute stressors that resolve rapidly. Present day chronic, low-grade stress results in the continual release of CRH (Corticotrophin Releasing Hormone) from the hypothalamus. This chronic secretion causes dysfunction in the HPA axis, desensitizing the hypothalamic and pituitary receptors to negative feedback from adrenaline, noradrenalin and particularly, cortisol. Loss of negative feedback within the neuro-hormonal system results in a multitude of health issues. It increases the production of ADH, aldosterone, and angiotensin increasing vascular vasoconstriction and sodium retention. It increases Creactive protein and endothelin, which is not favorable for the cardiovascular system. Additionally, it directly increases LDL production as well as glucocorticoid and mineralcorticoid release. When the negative feedback loop within the HPA-axis is disrupted, chronic hormonal secretion becomes “normal” for that individual. In this state, they either fail to recognize they are stressed, or they may experience exaggerated emotional and physical response to every stressor including intolerance to noise or light, or feeling overwhelmed by simple tasks. Stress affects so many aspect of health that it is becoming crucial to rebalance the HPA-axis. Lactium®, a bioactive casein decapeptide (a polypeptide 10 chain amino acid alpha-1 sequence) isolated from cow’s milk is effective in not only decreasing glucocorticoid secretion but will assist in rebalancing the HPA pathway. Lactium® works at three areas of the HPA-axis: 1) Lactium® binds specifically to the BZD site of the GABA-A receptor and does NOT bind to the PBR site of the GABA-A receptor responsible for the sedating effects seen with benzodiazepines. 2) Lactium® increases the sensitivity of the hypothalamus to cortisol, re-establishing receptor sensitivity feedback within the HPA-axis. It reduces the amount of CRH produced in response to stress.† 3) Lactium® decreases the amount of cortisol released by the adrenal glands during acute and chronic stress.† Studies in humans using alpha-S1-casein decapeptide have resulted in calming effects, without side effects. Results showed a significant decrease in plasma cortisol throughout the combined stress tests and stable heart rate in the treatment group but not in the placebo group. Another study showed after 30 days of supplementation a reduction in stress related issues including digestive, cardiovascular, intellectual, emotional, and social.† L-Theanine is a unique amino acid found naturally in green tea providing relaxation support without drowsiness. L-theanine has been shown to increase alpha-wave production, an observed pattern considered to be an index of relaxation.† Vitamin D has been included for additional support of immune function that may be compromised during stress. Vitamin D has many functional roles in the body, including modulation of cell growth, neuromuscular and immune function, bone health and inflammatory support.†

Supplement record

Review serving details and ingredients for this product.

Supplement Facts:
Suggested Use: Suggested Usage: As a dietary supplement, adults take 1 capsule daily on an empty stomach or as directed by your healthcare professional. Warning: Do not use if you are pregnant, breastfeeding or allergic to milk protein. Consult a healthcare practitioner prior to use if you are taking antidepressant and/or anxiolytic medications.
1 Vegetarian Capsule
Ingredients AMT %DV
Casein decapeptide (milk) (Lactium®) 175 mg -
L-Theanine (Suntheanine®) 50 mg -
Vitamin D3 100 IU -
Other Ingredients: Hydroxypropylmethylcellulose (capsule), cellulose andsilica. This product contains NO yeast, wheat, gluten, corn,sodium, sugar, arti cial coloring, preservatives orfl avoring.
(-) There is no %DV or the manufacturer has not provided this data.