Orders are processed within 3 business days (target: within 48 hours). Once shipped, delivery takes 3–5 business days depending on your location and customs procedures.

Free shipping on orders of $50 or more.
For orders under $50, a shipping fee of $10 applies.

You'll receive a tracking number by email once your order ships. If you don't see it, please check your spam folder.

For non-contact deliveries, we are not responsible for loss or damage once a package is marked as delivered. Please contact support@esther-mall.com.

Yes. Customs duties, import taxes, and VAT are the customer's responsibility, and we cannot issue refunds or reshipments if a package is rejected at customs.

Log in to your account and go to My Account > Subscription. From there you can change your delivery frequency, view your billing date, update your shipping address or payment method, pause, or cancel — all on your own.

Go to My Account > Subscription > select your subscription > click Cancel Subscription. Note: if your next order has already been processed, cancellation will apply starting from the following order.

Yes, both can be updated directly from the Subscription page.

If your next order was already being processed at the time of cancellation, that order is not affected — future recurring orders will be canceled as requested.

Please contact our support team at support@esther-mall.com for help.

For hygiene and product safety reasons, we do not accept returns or exchanges for change of mind. However, if you receive a damaged, defective, or incorrect item, contact support@esther-mall.com within 7 days of receipt with your order number and photos/video, and we'll arrange a replacement or store credit.

Once an order has been fulfilled, it cannot be canceled, so please double-check your order before confirming.

First, check the status with the shipping carrier using your tracking number. If the loss is confirmed, let our support team know and we'll arrange a replacement.

Every case is reviewed individually. Confirmed defective or misshipped items are resolved with a replacement or store credit. Packages returned due to customs refusal are not eligible for a refund.

Esther Formula is a Korean inner-beauty and wellness supplement brand founded in 2008 by Dr. Esther Lyuh, a physician specializing in preventive medicine and a graduate of Seoul National University College of Medicine. She built the brand on her belief that prevention should come before treatment, guided by one personal rule: "If I wouldn't give it to my family, I won't sell it." As she puts it, "As a researcher first and a physician second, I owe consumers scientifically reproducible data — not vague impressions." That standard is still what every Esther Formula product is held to today.

Dr. Lyuh's vision for Esther Formula goes beyond any single product or format: to make science-backed, physician-vetted wellness accessible to people everywhere, not just in Korea. As she puts it, "We see this as part of a broader evolution in preventive wellness... we plan to bring our innovations to consumers around the world." Whether that means new formats, new ingredients, or new markets, the goal stays the same — everyday wellness habits people can actually trust, built on evidence rather than trends.

Esther Formula introduced its first oral dissolving film supplement in February 2022 in Korea — Korea's first film-type supplement to contain glutathione, built around a signature antioxidant network of Vitamin C, Vitamin E, milk thistle, and L-cysteine. That same Korean-developed film technology is what we've brought to the U.S. Today, our U.S. lineup is focused on inner beauty and wellness, with film supplements for glutathione, ceramide, melatonin, and biotin — and we're continuing to expand the range.

Yes. Since its February 2022 launch, the Lyuh Esther Glutathione Film line has reached cumulative sales of 600 million units as of 2026. Esther Formula has also won Korea's Consumer Grand Prize for Film-Type Inner Beauty for three consecutive years (2022–2024), and in 2025 received a commendation in the Customer Satisfaction category at Korea's National Productivity Awards, hosted by the Ministry of Trade, Industry and Energy. Esther Formula has also been sold on Olive Young, Korea's largest beauty and wellness retailer, since 2025 — holding the #1 position in the dietary supplement category as of Q2 2026.

Building on the popularity and trust Esther Formula earned in Korea, we established our own manufacturing facility in Lakeport, California, to prepare for a full-scale U.S. entry. In May 2026, we introduced our film supplements to the U.S. for the first time — launching our Liposomal Glutathione Strips at Olive Young locations in Los Angeles (Westfield Century City, opened May 1, and Old Pasadena, opened May 31). Today, you can find us online through our official site, Amazon, and TikTok Shop, and in person at Olive Young stores across the U.S.

Standard tablets and capsules are absorbed through the stomach and liver. Along the way, stomach acid, digestive enzymes, and first-pass liver metabolism reduce actual absorption to an average of just 10–20%. Esther Formula's strips instead adhere directly to the oral mucosa (the roof of the mouth) and dissolve there, bypassing the digestive tract and liver entirely to enter the bloodstream directly through capillaries.

The oral mucosa is dense with blood vessels, so when an Esther Formula strip dissolves in your mouth, active ingredients can enter the bloodstream more quickly without passing through the stomach or liver. This means the strip format can lead to higher bioavailability — the actual proportion of an ingredient that gets absorbed and used by the body. A peer-reviewed clinical study (European Journal of Pharmaceutics and Biopharmaceutics, 2026) found that Esther Formula's film-form glutathione produced blood glutathione concentrations about 40% higher at 4 hours and 35% higher at 6 hours compared to tablets.

Individual packaging keeps each dose hygienic and fresh, and the format is highly portable for use anytime, anywhere. Standard capsules typically come in bulk bottles, which are comparatively less portable.

Yes. In a clinical trial conducted by Jeonbuk National University Hospital with healthy adults, Esther Formula's film-form and tablet-form glutathione were directly compared. The group that took the film had higher blood glutathione levels than the tablet group at both the 4-hour and 6-hour mark, and no side effects were reported during the study. The research was published in the international journal European Journal of Pharmaceutics and Biopharmaceutics (2026) and is officially registered with Korea's Clinical Research Information Service (CRIS No. KCT0011710).

Yes. Open the pouch, place the strip on your tongue, press it to the roof of your mouth, and it dissolves in about minutes — no water needed.

Yes. Our U.S. manufacturing facility is officially registered with the FDA as a food facility (FDA Food Facility Registration Number: 19708645008). We're also currently pursuing GMP certification as part of our ongoing quality assurance program.

Shelf life varies based on the specific formulation of each product, though most Esther Formula strips carry a 2-year shelf life. Every product has its expiration date printed on the bottom of the package. Please check the specific product page or packaging for the exact shelf life.

For all our supplement products, ingredients have been verified as safe by Korea's Ministry of Food and Drug Safety (MFDS). That said, since individual conditions vary, we recommend consulting a healthcare professional before use.

Our products are dietary supplements made with ingredients verified for safety by Korea's Ministry of Food and Drug Safety (MFDS), and there are no specific ingredients that restrict use by children. That said, we recommend consulting a doctor before giving any Esther Formula product to a child. When giving it to children, we recommend cutting it into smaller pieces for children, or having an adult supervise until the strip has fully dissolved.

Allergen content can vary by product and formulation. If you have known allergies or sensitivities, please check the ingredient list on the specific product's page or packaging before use.

You can purchase our products at the Esther Formula Official Store on Amazon.com, the Esther Formula Official TikTok Shop, and Olive Young US!