Legion Collagen+ Review
15 g of certified grass-fed collagen peptides per serving. Good evidence for skin and connective tissue, poor protein for muscle. The difference matters.
15 g of SOLUGEL® certified grass-fed collagen peptides, which is inside the dose range the skin and tendon trials used. The important thing this page will tell you and the tub will not: collagen is a low-quality protein for building muscle and should not count toward your protein target. Buy it for connective tissue, not as a shake.
Disclosure: we earn a commission if you buy through this link, at no extra cost to you. It does not change what this page says, and we were not paid to write it.
What is in it
| Collagen peptides | 15 g |
| Source | SOLUGEL® certified grass-fed |
| Serving size | 15.06 g |
| Tryptophan | None — collagen is an incomplete protein |
| Proprietary blend | None |
| Size | 30 servings |
| One-time purchase | $49.99 — $1.67 per serving |
| With a subscription | $37.49 — $1.25 per serving |
Prices checked at legionathletics.com on 29 August 2026 and will have moved since. The subscription price is a recurring order you can cancel, not a one-off discount — check the current price before you buy.
Why this does not count as your protein
Collagen is missing tryptophan entirely and is low in the branched-chain amino acids, leucine in particular, which is what triggers muscle protein synthesis. That makes it an incomplete protein and a poor one for muscle. If you swap 15 g of whey for 15 g of collagen and keep your total the same on paper, you have quietly cut your effective protein. Count collagen as extra, never as part of the target.
What the evidence does support
Skin elasticity and hydration have the most consistent trials, typically 2.5 to 15 g a day over 8 to 12 weeks, with small measurable improvements. Joint and tendon discomfort has a smaller and noisier literature that leans positive, usually at 10 to 15 g. At 15 g a serving this product is at the top of the studied range rather than sprinkling a token amount, which is the more common approach in this category.
Peptides, and what hydrolysis is for
Collagen peptides are hydrolysed into short fragments that dissolve and absorb more easily than intact collagen. That is a real processing difference rather than a claim. It does not change the amino acid profile, which is the limitation above; it changes how easily you can drink it.
Not the same thing as the UC-II in a joint formula
This gets confused constantly. Collagen peptides are taken in grams as raw material. Undenatured type II collagen is taken in milligrams for an immune-mediated effect in the joint. They are different mechanisms with different doses, and one does not substitute for the other.
Who it is for
- You want the skin or connective-tissue effect and will take it daily for months
- You want a dose in the range the trials used, not a token amount
- You already hit your protein target from other sources
- You are counting it toward your daily protein
- You want it for muscle growth
- You expect anything visible in the first month
Disclosure: we earn a commission if you buy through this link, at no extra cost to you. It does not change what this page says, and we were not paid to write it.