Why does it contain dicalcium phosphate?

Douglas Laboratories tells us that the dicalcium phosphate is used in the tableting process to help compress the ingredients and add structural support to the product.

Anyone know if these are vegan? Their website doesn’t say.

This is a pharmaceutical made melatonin.

What is the difference between the prolonged-release formulation and the controlled-release one?

Douglas Laboratories Melatonin Prolonged Release contains 3 mg while Melatonin Controlled Release contains 2 mg of high purity melatonin. They both use a prolonged-release tablet, formulated to slowly breakdown and release in the small intestine.

Are companies in China providers of the raw ingredients which are then finished and manufactured in PA?

Douglas Laboratories sources ingredients from all over the world, including China. Douglas Laboratories products are then manufactured in the USA.

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Douglas Laboratories Melatonin Prolonged Release - 3 mg Melatonin - Sleep Support Supplement - for Hormone Balance, Relaxation, Antioxidants & Immune System* - 180 Tablets

Product ID: 28325411

Details

Age Range (Description)
Adult
Brand
Douglas
Dosage Form
Tablet
Item Form
Tablet
Item Weight
2.86 ounces
Item dimensions L x W x H
3.8 x 2.3 x

⏳3 mg prolonged-release melatonin

🛌Supports natural sleep/wake cycle

🛡️Antioxidant immune support

Description

🌙 Unlock your best night’s sleep and wake up unstoppable!

SUSTAINED SLEEP SUPPORT - 3 mg melatonin released gradually for all-night relaxation and deep sleep.
PREMIUM QUALITY ASSURANCE - GMP-certified, GMO-free, and NSF-registered for trusted purity and potency.
CIRCADIAN RHYTHM REGULATOR - Helps maintain your natural sleep/wake cycle for consistent, refreshing rest.
HORMONE CORTISOL BALANCE - Formulated to promote healthy hormone levels and stress management overnight.
IMMUNE BOOSTING ANTIOXIDANTS - Melatonin’s antioxidant power supports your immune defenses while you sleep.

Douglas Laboratories Melatonin Prolonged Release delivers 3 mg of pharmaceutical-grade melatonin in a slow-release tablet designed to support restful sleep, regulate circadian rhythms, and provide antioxidant immune support. Crafted with premium quality standards, this supplement also aids hormone balance and cortisol management, making it an essential addition to your nightly wellness routine.

Specifications

ASIN	B003PQUE70
Age Range Description	Adult
Best Sellers Rank	#61,735 in Health & Household ( See Top 100 in Health & Household ) #604 in Herbal & Nutritional Sleep Supplements
Brand	Douglas Laboratories
Brand Name	Douglas Laboratories
Container Type	Bottle
Customer Reviews	4.5 out of 5 stars 458 Reviews
Dosage Form	Tablet
Item Dimensions	3.8 x 2.3 x 2.1 inches
Item Form	Tablet
Item Weight	2.86 ounces
Item dimensions L x W x H	3.8 x 2.3 x 2.1 inches
Manufacturer	Atrium - Douglas Laboratories
Manufacturer Part Number	83199-180X
Material Features	GMO Free
Number of Items	1
Product Benefits	Sleep Support
Unit Count	180 Count

Reviews

P**R

11.03.2026

N**E

10.06.2025

A**R

14.12.2019

T**.

22.08.2024

S**R

7.08.2025

B**B

25.11.2022

B**R

13.09.2021

S**V

9.11.2025

D**W

14.07.2017

T**O

14.10.2016

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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