L-Serine is a brain health supplement that supports nervous system function, offering a steady daily amount of L-serine to help keep brain communication running smoothly, backed by Douglas Laboratories' trusted standards. Each capsule uses a clean, non-GMO formula. Manufactured in the USA at our Pittsburgh facility, it meets strict purity and potency standards. A physician trusted brand, Douglas Laboratories has long stood for quality in professional settings.

Available Sizes & Variants:

60 capsules - Daily capsule format for easy dosing.

Benefits & Features:

• L-Serine supports daily brain health with a simple, reliable capsule format.
• Clean, allergen-free formula avoids common irritants, keeping stomach comfort in mind.
• Designed for daily use, this professional grade supplement makes it easy to support brain health with a simple, once daily capsule.
• L-Serine is manufactured in the USA to high purity and potency standards.
• Plain, capsule format fits easily into daily routines.

Douglas Laboratories has built a solid reputation as a professional grade brand known for purity and potency. This L-Serine formula is produced in the USA at the Pittsburgh facility, following tight standards and tamper resistant packaging to protect freshness. The product is gluten-free and non-GMO with minimal inactive ingredients, reflecting the brand’s focus on clean, reliable supplements physicians trust. For those building a broader wellness routine, many users also explore probiotics for gut health, a vitamin d supplement, and even n acetylcysteine alongside their daily regimen.

Cellulose, gelatin (capsule) and vegetable stearate.

• GTIN: 310539018422
• Manufacturer: Douglas Labs
• Categories: Douglas Labs SupplementsNew Arrivals
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take 1 capsule daily or as directed by your healthcare professional. One (1) capsule each day as a dietary supplement or as otherwise directed by a healthcare professional. Caution: Not recommended for pregnant or lactating women.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: L-Serine

L-Serine is an amino acid used in protein synthesis and other metabolic processes. This product supplies pharmaceutical-grade L-serine as the active ingredient in capsule form.

Douglas Laboratories delivers the amino acid in a clean non-GMO formulation with minimal inactive ingredients, reflecting professional-grade manufacturing standards.

What Does L-Serine Do?

L-Serine is involved in brain health and nervous system support. It is described as contributing to the formation of myelin sheaths and phospholipids for cell membranes, supporting normal brain and nerve function.

These activities are listed in product materials as part of the nutrient’s role in supporting central nervous system processes, aligning with standard physiological functions cited for amino acids.

This supplement isn't intended to diagnose, treat, cure, or prevent any disease.

Douglas Laboratories is our chosen manufacturer for L-Serine because they’re recognised as a professional-grade supplement producer with a long-standing reputation for purity and potency. The brand is known for prioritising top-notch ingredients and domestic manufacturing, with production carried out at their USA-based facility in Pittsburgh, PA. This heritage and commitment to quality underpin their standing across professional healthcare channels, reinforcing confidence in a practitioner-trusted supply line.

For this particular supplement, Douglas Laboratories demonstrates product-specific capability through a clean, non-GMO, gluten-free formulation that minimises inactive components while delivering the accurate dosage per capsule. Their focus on robust storage and tamper-resistant packaging aligns with Welzo’s emphasis on quality and safety, which we verify through our our quality certification process.

Our evaluation process recognised Douglas Laboratories as a trusted partner whose manufacturing philosophy emphasises purity and controlled production environments. This brand is perfectly suited to L-Serine, benefiting from their professional heritage and the brand’s alignment with Welzo’s standards. Learn more about our expert team and evaluation at our expert team of doctors, nurses, and nutritionists.