Try CRUX for a full 90 days. Tendons rebuild slowly, we'd rather give you enough time to actually feel the difference than have you judge it after a week. Take it daily, on climb days and rest days. If your hands don't feel more supported and your recovery hasn't improved, email us and we'll refund every penny, even if the pouch is empty. No forms, no runaround, no "return the unused portion." Ninety days, all the risk on us.

Climbing loads your fingers in a way almost nothing else does, and pulleys and tendons are nearly avascular, meaning they get very little blood flow. That's why finger injuries drag on for months while a pulled muscle bounces back in days. CRUX is built around that problem.

Every scoop delivers 15g of Type I hydrolyzed collagen peptides, the exact protein your tendons and pulleys are made of, alongside vitamin C, the cofactor your body needs to actually assemble that collagen into new tissue. One without the other doesn't work, so we dose both. We add AKBA-standardized Boswellia to help manage the everyday aches and stiffness that come with hard training, so you feel supported while the rebuild happens underneath.

The trick isn't a bigger dose. It's consistency. Take it every single day and you're steadily giving your hands the raw material to keep up with what you're asking of them.

Yes. CRUX is made in a facility that follows cGMP standards, and every batch is third-party tested for purity and heavy metals. The formula is intentionally simple: collagen peptides, vitamin C, and Boswellia. No stimulants, no proprietary "blends" hiding the doses, no artificial junk. It's gluten-free and zero sugar. As with any supplement, if you're pregnant, nursing, on medication, or managing a health condition, check with your doctor first. These statements have not been evaluated by the FDA; this product is not intended to diagnose, treat, cure, or prevent any disease.

Type I Hydrolyzed Collagen Peptides (15g): the primary structural protein in tendons, ligaments, and pulleys. Hydrolyzed for easy mixing and absorption.

Vitamin C (50mg): the essential cofactor your body uses to synthesize collagen. Collagen without vitamin C is raw material your body can't fully use.

Boswellia Serrata, AKBA-standardized (150mg): a botanical traditionally used to support a healthy response to the everyday aches and stiffness of hard training.

Copper (trace, ~1mg): supports the natural cross-linking that gives connective tissue its strength.


No added sugar. Gluten-free. No stimulants, fillers, or artificial colors.

How do I take it?

One scoop daily, mixed into water, coffee, or a smoothie. Same time every day, climb day or rest day. Consistency is the whole point.

How long until I feel it?

Most people notice less daily stiffness within the first couple of weeks, with clearer improvement in recovery around the one-month mark. The deeper rebuild keeps building over 3–6 months of daily use, which is why we give you a 90-day window to judge it.

Do I only take it on climbing days?

No, daily is the point. Your tendons rebuild on a schedule of weeks, not sessions, so they need a steady supply every day, not just when you're on the wall.

Does it taste bad or clump?

No. The peptides are hydrolyzed so they dissolve cleanly with a quick stir and have a neutral taste that disappears in coffee or a smoothie.

Can I take it with the Joint Support capsules?

Absolutely, they're designed to work together. CRUX powder supports your tendons through the day; the nightly Joint Support capsule looks after your finger joints. Two tissues, two rituals, full hand coverage.

Is it just beauty collagen?

No. Beauty collagen is dosed and formulated for skin. CRUX is built for the loads climbing puts on tendons and pulleys. The collagen dose, the vitamin C pairing, and the Boswellia are all chosen for hands that climb.