Natural Supplement That Repels Insects

Stop fighting bugs from the outside. Learn how internal mineral balance makes you naturally unattractive to biting insects.

Hiker swatting at mosquitoes on a trail, illustrating an article on natural supplement that repels insects
Hiker swatting at mosquitoes on a trail. Used for illustration only — Tarsul is a dietary supplement, not a treatment for any condition.

The Problem with Spray-On Protection

You know the drill. You step outside for a hike, a barbecue, or just to work in the garden, and immediately the swatting begins. You grab the bug spray, coat your skin in sticky chemicals, and hope for the best. A few hours later, you have to do it all over again.

Most people accept this as just part of spending time outdoors. But what if you could change how insects perceive you in the first place?

Why do some people get eaten alive by mosquitoes while others barely get a single bite?

The Internal Repellency Concept

Mosquitoes and other biting insects do not choose their targets randomly. They are highly specialized hunters that track their prey using a complex combination of chemical signals, including carbon dioxide output, body heat, and the specific composition of compounds secreted through your skin and sweat.

When you use topical repellents, you are temporarily masking these signals or confusing the insect’s receptors. But this approach is fundamentally flawed because it requires constant reapplication and only protects the areas you actually spray.

Cream of tartar and MSM sulfur powder, the two ingredients in Tarsul, in the context of insect bites and repellency
Tarsul is a fine white powder — potassium bitartrate (cream of tartar) combined with MSM sulfur — stirred into water rather than swallowed as a tablet.

Internal repellency works differently. By altering the specific compounds your body naturally excretes, you can make your chemical signature fundamentally unappealing to pests. You are not hiding from them; you are changing the signal you broadcast.

The Sulfur Connection

One of the most effective ways to alter your body’s chemical signature is through sulfur. When your body processes dietary sulfur, it excretes subtle sulfur compounds through the pores of your skin. While these compounds are generally undetectable to human noses, they are highly repulsive to mosquitoes, ticks, and other biting insects.

This is why people with diets naturally high in sulfur-rich foods often report fewer insect bites. However, getting enough consistent, bioavailable sulfur through diet alone can be difficult.

How Tarsul Changes the Game

Tarsul provides a consistent, highly bioavailable source of elemental sulfur. When taken daily, it gently alters your skin’s chemical excretions, creating an invisible, full-body barrier that insects naturally avoid.

Tarsul 60-capsule, 600 gram and 150 gram bottles, the sizes referred to in this natural supplement that repels insects guide
Tarsul is sold in a 150 gram bottle, a 600 gram bottle and a 60-capsule bottle. Dosing guidance is on the ingredients page.

This means no more sticky sprays, no more missed spots, and no more worrying about when to reapply. You simply support your body’s internal chemistry, and your body does the rest.

Ready to Enjoy the Outdoors Again?

Start your daily Tarsul routine and experience the freedom of natural, internal insect protection.

Order Tarsul Today

*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.

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About this page — last reviewed September 2026

Published by Tarsul, a family-run dietary supplement company operating from San Diego, California since 2010. Written and reviewed in-house by Russ Guillemot, founder, drawing on fifteen years of direct correspondence with customers and wholesale accounts. We are not physicians and nothing here is a diagnosis or a course of treatment.

Where we reference published research we name the authors and the journal so you can look it up yourself. Where something is a common observation rather than a finding, we say so plainly. If a claim cannot be sourced, we leave it out.

Tarsul · 2307 Fenton Parkway #107-42, San Diego, CA 92108 · 619-500-4403 · info@tarsul.com

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.