Four targeted actives, no filler. L-Arginine drives circulation into the joint; Arnica Montana and MSM soothe soreness and support the connective tissue; Magnesium Chloride eases the muscle tension that builds up around a sore knee. No proprietary blends — what's on the label is what's in the jar.

It's transdermal. Rubbed over the knee, the actives absorb locally into the tissue right at the joint — instead of being swallowed and diluted across your whole body like a pill. That's the whole point: getting soothing, circulation-driving actives to the exact spot that aches, the way a pill can't.

Most drugstore creams are a single ingredient that sits on the surface and fades — a cold or warm distraction you keep reapplying. Lumen is four targeted actives — Arnica, MSM, Arginine and Magnesium — made to absorb in and build up with daily use, soothing the joint and driving circulation rather than just masking a signal for an hour.

A small amount rubbed over the affected knee, morning and night. Massage it in until it absorbs and let it dry before dressing. Ideally after a warm shower, when your skin is most open. Because it works by building up with consistent use, doing it daily is what matters most.

Most people feel a cooling, soothing sensation on contact from the very first use. The bigger shift — less morning stiffness and a looser feel through the day — tends to build over the first couple of weeks of daily use, and keeps compounding from there. It's a daily ritual, not a one-time fix.

Use it for a full 30 days. If you don't notice a real difference in how your knee feels — looser, more comfortable, easier to move — just email us and we'll refund your first order. No questions asked, no hoops.