Buy derma roller Amazon, or microneedling is a technique that uses a device studded with fine needles to stimulate skin cells and increase blood flow to the surface. This in turn boosts collagen production and helps reduce the appearance of fine lines and wrinkles, as well as scarring from acne and other conditions.

However, the effectiveness of at-home derma rollers is still up for debate, with some dermatologists recommending the practice only in conjunction with more proven treatments. So, before you take the plunge and pick up one of these DIY devices, here are a few tips from the pros that can help ensure safe, effective results.

1. Derma Roller 0.25mm:

Sdara’s microneedling derma roller is an easy-to-use tool that comes with a clear case and a set of instructions for use. To start, the tool should be sterilized by soaking it in alcohol before and after each session. Once clean, the roller should be rolled over your face four to five times, switching directions each time. “Rolling in the same direction multiple times can cause scarring,” says Dr. Joshua Zeichner. “So, it’s important to switch up your movements—horizontal, diagonal, vertical.”

2. ORA Facial Microneedle Roller System – Advanced Therapy (0.5mm):

The microneedles on this derma roller are a little longer than those of Sdara’s tool—and at a more affordable price tag to boot. To use, sanitize the device with alcohol as recommended and apply serum afterward as directed. Just be sure not to roll over open cysts or pimples, as this can lead to bacterial infections and hyperpigmentation.