As much as we’re looking forward to the cooler weather, cozier outfits and, yes, pumpkin spice-flavored treats, we’re not excited about sick season making a comeback. To ensure your immune system is functioning at its best, add vitamin C capsules to your routine. California Gold Nutrition cut the price on its bestselling option as part of iHerb’s 30th anniversary sale, so you can stock up while the deal (and weather) are hot.

California Gold Nutrition has hundreds of thousands of reviews on its Gold C Vitamin C Veggie Capsules. The vegetarian-friendly, gluten-free, soy-free supplements help with immune system function. Does that mean they’ll prevent you from getting sick this fall and winter? Well, there’s no magic pill for that. However, it could give your body a better fighting chance of staying out of the doctor’s office.

Get the California Gold Nutrition Gold C Vitamin C Veggie Capsules for $12 (originally $15) at iHerb!

What makes these specific vitamin C supplements so special? Each serving packs 1,000 milligrams of United States Pharmacopeia (USP)-grade vitamin C as pure ascorbic acid. The potent formula also protects against daily cellular wear and tear, so it supports regeneration and boosts antioxidants in the body.

California Gold Nutrition recommends taking just one vitamin C capsule each day. You can take it with food or without, making it convenient to take whenever works best for you. Just be sure to check with your doctor before implementing it in your routine.

Real-life shoppers agree that this find is easy to take every day, and they feel better for it, too.

“The capsules are easy to swallow, have no smell or taste and are easy on my stomach. I take it daily, as 1,000 milligrams is the daily recommended dose if you work with a dietitian and want to achieve the most benefit out of it,” one five-star reviewer wrote.

“I’ve been taking this vitamin for almost a month now, and I can already feel my skin glowing and my immune system strengthening. It doesn’t make me tired after an intense workout like the other supplements do. I feel more energized and positive!” a verified purchaser shared.

These vitamin C capsules come in different-count bottles, but by snagging the 240-capsule option, you know you’ll be covered for nearly eight months. Don’t forget to check iHerb for daily flash deals on top brands (think: Bloom Nutrition, Ritual and more) during its 30th anniversary event!

Get the California Gold Nutrition Gold C Vitamin C Veggie Capsules for $12 (originally $15) at iHerb!