What to Avoid When Taking Collagen (and When to Take It)

Most collagen mistakes are not exotic. They are the ordinary ones: quitting too early, forgetting the one nutrient your body needs to use collagen, and buying the wrong type for the goal. One more fact belongs up front: our collagen comes from cattle, so it is bovine, and that means it is not vegan. We make a collagen gummy, so we have answered these by email more times than we can count. Here is the short list of what to skip, and when to take it.

Quick facts

• In a 2019 systematic review of collagen supplementation trials, the trials that showed skin changes ran 8 to 24 weeks.
• The NIH Office of Dietary Supplements states that vitamin C is required for the biosynthesis of collagen, L-carnitine, and certain neurotransmitters.
• Type I and Type III collagen are the types skin, hair, and nails are built from, while Type II is a different molecule studied for joints and cartilage.

Mistake 1: expecting it to work fast

Collagen is a slow build. Nothing about it happens in a fortnight. In a 2019 systematic review of collagen supplementation trials published in the Journal of Drugs in Dermatology, the trials that showed skin changes ran 8 to 24 weeks, at daily doses of 2.5 to 10 grams of collagen hydrolysate. Nails take longer still. In a separate 24-week trial, 25 people with brittle nails took 2.5 grams a day of a branded collagen peptide, and researchers reported a 12% increase in nail growth rate and a 42% decrease in the frequency of broken nails. Those are study doses and study averages, and they describe those trials rather than any gummy. The point to take from them is the clock: months, in every trial.

So if you try collagen for two weeks and quit, you never gave it the kind of window the research used. Treat it as a daily habit rather than something you evaluate in a fortnight.

Mistake 2: forgetting vitamin C

This is the one most people miss, and it is basic biochemistry. Your body builds its own collagen using enzymes that need vitamin C to work. The NIH Office of Dietary Supplements states it directly: "Vitamin C is required for the biosynthesis of collagen, L-carnitine, and certain neurotransmitters." Without enough vitamin C, that process stalls. The point is making sure your body has the cofactor it needs to do collagen work at all, which is different from "absorbing" a supplement.

The good news is the bar is low. The recommended daily amount of vitamin C is around 75 to 90 milligrams for most non-pregnant adults, and a normal diet with citrus, peppers, or broccoli usually clears it. If you want to be sure, pairing collagen with our Vitamin C + Zinc gummy is a simple way to be sure you are not short.

Mistake 3: buying the wrong type

Collagen is not one thing. Type I and Type III are the ones your skin, hair, and nails are built from. Type II is a different molecule studied for joints and cartilage, at a much smaller dose. A skin-and-nails collagen is not a joint product, and a joint collagen is not a skin product. If you bought one expecting the other's job, the mismatch is the problem.

When should you take it?

Timing is the part people overthink. There is no strong evidence that morning versus night, or empty stomach versus with food, changes results for skin-and-nails collagen. Most trials simply had people take it once a day with a meal. So the best time is the time you will remember. Consistency is the lever here.

Where our gummy fits

A word on ours, because you deserve it before you buy. Our Collagen gummy has 100 milligrams of bovine Type I and III collagen per serving, built to be an easy, tasty daily add-on you will keep up with. And because the collagen is bovine-sourced, it is not vegan, and we say so on the label and here.

If you want the fuller version of how we think about collagen for skin, hair, and nails, that is on its own page.

The short list

Give collagen a real run of months, make sure you are getting enough vitamin C so your body can use it, buy the type that matches your goal, and take it whenever you will stay consistent. Skip those three mistakes and collagen becomes a quiet daily habit instead of a bottle you abandon in a drawer.

Reviewed on September 4, 2026.

This article is general information, not medical advice. Talk to your healthcare provider before starting any supplement, especially if you are pregnant or nursing, take medication, or have a health condition.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.