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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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🌟 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.

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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?

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