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Q: Relentless Improvement: do you self test the purity of overseas ingredients before production of D-Serine?

When the active arrives we sample it and send it out to a third-party analytical testing laboratory based in the USA. The material is quarantined until test results are received back. **As is required for GMP compliance.**

Q: Is this made in the usa? is it based on porcine aka pig, or shell fish?

The active is not available from USA suppliers. As you are well aware, our high-tech manufacturing was gutted and shipped offshore decades ago. Downstream of the active, all remaining manufacturing and testing is USA. The is no porcine, or shellfish.

Q: Relentless Improvement: do you third party test the purity of overseas ingredients before production of third D-Serine?

As required under GMP, yes. OF COURSE. We have conducted full third-party testing since we began business 17 years ago, before it was required by law. I'll also point out, 99% of actives used by ALL supplement companies come from "overseas" as USA manufacturing was gutted decades ago.

Q: For anyone who's tried both L-Serine & D-Serine, did D-Serine really achieve better results?

Because D-Serine has a poor absorption rate orally one must take a lot. I gave to my wife for three months when recovering. I don't know how well it worked but I would do again.

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Description

🌟 Fuel Your Focus with Relentless Improvement!

OPTIMAL DOSAGE - Maximize your focus with 700mg of pure D-Serine.
ELEVATE YOUR MIND - Unlock cognitive potential with every capsule.
PURE CLEAN FORMULA - Experience the power of D-Serine without additives.
PLANT POWERED PERFORMANCE - Harness the benefits of 90% plant-based ingredients.
JOIN THE WELLNESS REVOLUTION - Be part of a community that prioritizes clean health.

Relentless Improvement D-Serine offers a clean, plant-based cognitive enhancement solution with 700mg of D-Serine per capsule, delivered in a convenient 90-vegecap format, free from magnesium stearate.

Have a Question? See What Others Asked

Relentless Improvement: do you self test the purity of overseas ingredients before production of D-Serine?

Is this made in the usa? is it based on porcine aka pig, or shell fish?

Relentless Improvement: do you third party test the purity of overseas ingredients before production of third D-Serine?

For anyone who's tried both L-Serine & D-Serine, did D-Serine really achieve better results?

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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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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

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4 days ago

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