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This is medicube's oral glutathione supplement, a 14-day course of 2g stick packs. Ingestible beauty (in-and-out skincare) is a major Korean market category, and glutathione is the flagship ingredient, with Korean clinics routinely offering IV glutathione drip treatments for tone-evening effects. The oral format offers a practical alternative for users who can't access or don't want IV treatments. At $33.28 for 14 sticks, this is priced well below IV session costs (usually $80 to $200 per session in Korea, more internationally).
The debate around oral glutathione efficacy is unresolved in Western clinical literature. Korean and Japanese studies generally show measurable effects on skin tone and luminosity over 6 to 12 weeks of consistent use, with IV delivery producing faster and more dramatic effects. Oral glutathione bioavailability is low (much of the dose breaks down in digestion), which medicube addresses by pairing the glutathione with vitamin C and supporting cofactors that improve uptake and recycling.
Glutathione is the body's master antioxidant, directly neutralizing free radicals and recycling other antioxidants (including vitamin C and E). Oral supplementation increases glutathione availability in skin cells over weeks of consistent dosing. The result is visible brightening, reduced dullness, and slower melanin production. Supporting vitamin C in the formulation enhances both absorption and the antioxidant cascade.
Take 1 stick pack daily. Either pour directly into mouth (dissolves on tongue) or mix with water. Best taken with or after food to reduce any stomach discomfort. Consistent daily use over the full 14-day course is required for measurable effects.
For sustained benefit, repeat courses every 2 to 3 months. Some users maintain continuous daily use, which is generally safe but check with a physician if you have pre-existing conditions or take medications.
Korean and Japanese clinical data support measurable brightening effects over 6 to 12 weeks of consistent oral use. Western clinical literature is mixed due to bioavailability concerns. Formulations like this one that pair glutathione with vitamin C show better absorption data than plain glutathione. Real-world user reports are generally positive but not universal.
IV delivers much higher blood glutathione concentrations faster. Oral is slower and more modest but also much cheaper and more convenient. For serious tone concerns, IV is more effective. For maintenance and general antioxidant support, oral is reasonable.
Generally well-tolerated. Some users report mild stomach upset, especially if taken on empty stomach. Rare allergic reactions possible; discontinue if rash or swelling occurs.
Yes. They're synergistic. Most pre-formulated glutathione supplements already include vitamin C.
Noticeable brightening: 2 to 4 weeks of daily use. Visible tone evenness: 6 to 12 weeks. Best results with consecutive courses.
Pair with topical glutathione like medicube AGE-R Glutathione Glow Serum for combined in-and-out approach, or a vitamin C serum for topical antioxidant support.
Browse the full medicube collection or related: Korean beauty supplements, best Korean brightening products.
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