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Goodal

Goodal Green Tangerine Vita-C Dark Spot Care Serum α

Ingredient analysis and how the ad lines read

Read on 2026-09-24

What is this product?

A 30 ml Korean vitamin C serum from goodal's 청귤 비타C line, sold as a functional cosmetic for brightening and wrinkle improvement. The list leads with water and tangerine extract, has niacinamide fourth (stated at 5% in the copy) and carries four vitamin C entries, three derivatives and plain ascorbic acid, plus adenosine and glutathione, in a light gel base. There is no fragrance entry, but five essential oils and the allergens limonene and linalool are listed. No exfoliating acid; the acid-named entries are two vitamin C forms and thioctic acid. The brand cites several 2025 tests on 20 to 32 people; two charts print values, and one headline figure does not match its chart.

What makes it different?

A gel vitamin C serum that pairs niacinamide with several vitamin C forms and a high stated tangerine extract, compared on the page against the brand's earlier serum, and scented with essential oils rather than a fragrance entry.

Did the ad claims hold up?

We checked 36 lines this product advertises against the ingredient list and public documents. 2 of them hold up. The rest are only partly right or have nothing behind them.

Claims translated from Korean, originals preserved.

backed by evidence2

  • Skin outer, inner blemish (discoloration) improvement rate (between-group comparison)
    Korean original

    피부 겉, 속 잡티(착색) 개선율(군간 비교)

  • Blemish size improvement rate 50.75%
    Korean original

    잡티 크기 개선율 50.75%

likely, not proven4

  • Light stability UP
    Korean original

    빛 안정성 UP

  • Citron extract 305,594ppm
    Korean original

    청귤추출물 305,594ppm

  • Light and dewy gel texture
    Korean original

    산뜻 촉촉 젤 텍스처

  • UV-blocking design considering light-sensitive vitamins
    Korean original

    빛에 민감한 비타민을 고려한 UV 차단 설계

partly backed21

  • After 7 days, perceived blemish improvement effect
    Korean original

    7일 후, 체감되는 잡티 개선 효과

  • Reduction rate of gaze toward blemishes 80.5%
    Korean original

    잡티로 가는 시선 감소율 80.5%

  • Formulated with 3 types of vitamin C derivatives in Goodal's unique ratio
    Korean original

    비타민C유도체 3종을 구달만의 비율로 배합

  • Formula containing whitening functional 5%
    Korean original

    미백 기능성 5% 함유 포뮬러

  • Citron exosome 10,000ppm
    Korean original

    청귤엑소좀 10,000ppm

  • 503% absorption improvement human application test completed
    Korean original

    503% 흡수력 개선 인체적용시험 완료

  • Even for sensitive skin, reduces irritation burden while preserving pure vitamin C's mechanism!
    Korean original

    예민 피부에도 자극 부담은 줄이고, 순수 비타민C의 작용 원리는 그대로!

  • Irritation burden DOWN
    Korean original

    자극 부담 DOWN

  • Plant-derived delivery system that effectively delivers 3 types of vitamin C derivatives to the skin
    Korean original

    비타민C 유도체 3종을 담아 효과적으로 피부에 전달하는 식물 유래 전달체

  • At 1/2000 the size of a pore, 503% increased delivery power
    Korean original

    모공의 1/2000 크기로 503% 높아진 전달력

  • Citron exosome skin absorption rate 503.8%
    Korean original

    청귤엑소좀 피부 흡수도 503.8%

  • 7-day blemish farewell serum from outer visible blemishes to inner blemishes
    Korean original

    겉으로 보이는 잡티부터 속잡티까지 7일 잡티 이별 세럼

  • Proven No.1 blemish farewell serum - completed human application test for 10 types of blemish improvement
    Korean original

    증명된 1등 잡티 이별 세럼 10종 잡티 개선 인체적용시험 완료

  • Removes dullness to care for a clear and transparent skin tone
    Korean original

    칙칙함을 걷어내어 맑고 투명한 피부 톤케어

  • Radiance improvement 157.4%
    Korean original

    광채개선 157.4%

  • Skin transparency improvement 101.3%
    Korean original

    피부 투명도 개선 101.3%

  • Skin evenness improvement 11.9%
    Korean original

    피부 균일도 개선 11.9%

  • Dullness OUT, triple skin tone concern improvement
    Korean original

    칙칙함 OUT 3중 피부톤 고민 개선

  • Low-irritation blemish care without burden even on sensitive skin
    Korean original

    민감 피부에도 부담없이 저자극 잡티 케어

  • Sensitive skin suitability test completed
    Korean original

    민감성 피부 사용 적합 테스트 완료

  • Skin irritation test completed
    Korean original

    피부 자극 테스트 완료

no evidence6

  • No.1 blemish farewell serum
    Korean original

    1등 잡티 이별 세럼

  • Olive Young Awards 7 consecutive years winner
    Korean original

    올리브영 어워즈 7년 연속 수상

  • Outer/inner blemish (discoloration) improvement rate 67.3%
    Korean original

    겉,속잡티(착색) 개선율 67.3%

  • On the other hand, vitamin C derivatives in a neutral (pH 6~7) state reduce skin burden,
    Korean original

    반면 비타민C 유도체는 중성(pH 6~7) 상태로 피부 부담은 줄이고,

  • It cares with the same mechanism as pure vitamin C.
    Korean original

    순수 비타민C와 동일한 작용원리로 케어합니다.

  • No.1 blemish serum that daily and thoroughly cares from visible blemishes to early blemishes
    Korean original

    보이는 잡티부터 초기 잡티까지 매일 빈틈없이 케어하는 1등 잡티세럼

says nothing3

  • The blemish master Goodal's blemish farewell formula
    Korean original

    잡티 명가 구달의 잡티이별공식

  • VITA-C synergy boosting care
    Korean original

    VITA-C 시너지 부스팅 케어

  • Goodal's technology that captures both efficacy and stability
    Korean original

    효과와 안정성을 동시에 잡은 구달의 기술력

Each line is quoted as the brand published it, and each one was read on its own against the ingredient list and the documents the brand publishes.

How we read these lines

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