Vegan Supplements 101: What HPMC Capsules Mean for You

TigerFormel Editorial Team

If you've started paying closer attention to supplement labels, you've probably noticed “vegan capsule” or “HPMC capsule” printed somewhere on the packaging. Here's what that actually means.

What traditional capsules are made from

Most capsules historically use gelatin — a protein derived from animal collagen, usually from cattle or pigs. It's cheap, dissolves reliably, and has been the industry default for decades. It is, obviously, not vegan or vegetarian.

What HPMC is

HPMC stands for hydroxypropyl methylcellulose, a plant-derived compound made from cellulose (usually sourced from wood pulp or cotton). It's processed into a capsule shell that behaves similarly to gelatin — dissolving at a comparable rate in the body — without any animal-derived material.

Why it matters beyond diet labels

Besides fitting a vegan or vegetarian diet, HPMC capsules are also generally preferred by people who avoid gelatin for religious or cultural reasons (some gelatin is sourced from pork), and they tend to be more stable in humid climates since they're less prone to the softening gelatin capsules can experience.

What to check on a label

“Vegan” and “vegetarian” aren't legally standardised terms everywhere, so it's worth checking the capsule shell material specifically, not just a badge. TigerFormel's capsule shell, for example, is listed explicitly as HPMC with no gelatin, alongside the full ingredient breakdown for what's inside the capsule itself.

One thing HPMC doesn't change

The capsule shell material has no bearing on what's inside it — it's worth checking the actual ingredient list and dosages separately, since a vegan capsule can still contain a poorly dosed or low-quality formula, and vice versa.