{"ok":true,"data":{"product":{"brand":"numbuzin","name":"No.5+ Glutathione Vitamin Concentrated Serum","slug":"numbuzin-no-5-glutathione-vitamin-concentrated-serum","product_url":"/products/numbuzin-no-5-glutathione-vitamin-concentrated-serum","brand_url":"/brands/numbuzin","subcategory":"serum","formulation":"serum","finish":null,"price_tier":"mid_range","enriched_price":"$26.00","enriched_price_usd":26,"retailers":["Amazon","Ulta","YesStyle","Olive Young US","StyleKorean","Stylevana","iHerb","Nordstrom"],"key_ingredients":["Glutathione","Niacinamide","Vitamin C","Tranexamic acid","Alpha-Arbutin","Panthenol","Hyaluronic acid","Shea butter","Bifida ferment lysate","Ceramide NP"],"claims":["brightening","targets hyperpigmentation","improves uneven skin tone","suitable for sensitive skin"],"consensus_summary":"Numbuzin No.5+ Glutathione Vitamin Concentrated Serum has a slightly viscous, hydrating texture that layers well under moisturizer, and several creators say it fades red and brown acne marks and adds overall glow with daily use over weeks. Mad About Skin (skincare focus) calls it a \"little miracle\" for preventing hyperpigmentation from breakouts, while Val Foché saw no effect and decluttered it.","gtin":null,"shades":[]},"signal":{"total_mentions":5,"holy_grail_count":1,"loves_it_count":1,"worth_trying_count":1,"mentions_count":1,"mixed_count":0,"not_recommended_count":1,"unsponsored_count":5,"sponsored_count":0},"caveats":{"mixed_evidence":false,"single_creator":false,"no_price_data":false,"has_negative":true,"negative_note":"1 creator did not recommend this product."},"tags":{"claims":[],"attributes":[{"tag":"hydrating","label":"Hydrating","group":"attribute","polarity":"positive","mention_count":2,"product_count":1,"source_type":"llm_tagger","sample_quote":"It's lightweight, hydrating, and gentle yet effective enough for most sensitive skin types.","provenance":[{"creator_handle":"shelleynayak","creator_name":"Shelley 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skin","group":"skin_type","polarity":"negative","mention_count":1,"product_count":1,"source_type":"creator_quote","sample_quote":"This one can cause minor purging if your skin is not used to multiple brighteners, especially if your skin can't handle niacinamide and vitamin C derivatives together.","warning_text":"may not suit sensitive skin","provenance":[{"creator_handle":"charissedaily","creator_name":"Charisse Daily","channel_url":"https://www.youtube.com/@charissedaily","video_url":"https://www.youtube.com/watch?v=cw9OMev_ZzA","video_title":"Best serums for fading acne spots","video_date":"2025-11-05"}]},{"tag":"acne","label":"Acne","group":"concern","polarity":"negative","mention_count":1,"product_count":1,"source_type":"creator_quote","sample_quote":"I didn't notice any brightening or improvement in post acne.","warning_text":"didn't help with acne","provenance":[{"creator_handle":"val_foche","creator_name":"Val 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this.","timestamp_start":418.68,"timestamp_end":423.64,"timestamp_start_formatted":"6:58","video_url":"https://www.youtube.com/watch?v=KrgvqCJJouI&t=418s","sentiment":"positive","topics":["effective"],"mentions_variant":null},{"text":"When I see a breakout happening... I start on this straight away. Twice a day, work it into the area. I don't get any hyperpigmentation from that breakout. It heals in the shortest possible time and it just works.","timestamp_start":434.96,"timestamp_end":442.36,"timestamp_start_formatted":"7:14","video_url":"https://www.youtube.com/watch?v=KrgvqCJJouI&t=434s","sentiment":"positive","topics":["hyperpigmentation","breakout recovery","effective"],"mentions_variant":null},{"text":"If you have hyperpigmentation that isn't linked to breakouts, this will still work.","timestamp_start":448.72,"timestamp_end":452.72,"timestamp_start_formatted":"7:28","video_url":"https://www.youtube.com/watch?v=KrgvqCJJouI&t=448s","sentiment":"positive","topics":["hyperpigmentation","versatile"],"mentions_variant":null},{"text":"This is almost like a booster, a way to turbocharge your hyperpigmentation routine.","timestamp_start":462.92,"timestamp_end":468.68,"timestamp_start_formatted":"7:42","video_url":"https://www.youtube.com/watch?v=KrgvqCJJouI&t=462s","sentiment":"positive","topics":["hyperpigmentation","booster"],"mentions_variant":null},{"text":"This is just a little miracle.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=KrgvqCJJouI","sentiment":"positive","topics":["miracle"],"mentions_variant":null},{"text":"If you're on a hyperpigmentation journey and you want like a flash 2-week treatment that's just going to take your results from here to here, get this. You won't look back. So, so good.","timestamp_start":427.32,"timestamp_end":431.52,"timestamp_start_formatted":"7:07","video_url":"https://www.youtube.com/watch?v=KrgvqCJJouI&t=427s","sentiment":"positive","topics":["hyperpigmentation","treatment","recommendation"],"mentions_variant":null},{"text":"If you're an acne sufferer like me, that's a little dream.","timestamp_start":524.76,"timestamp_end":529.48,"timestamp_start_formatted":"8:44","video_url":"https://www.youtube.com/watch?v=KrgvqCJJouI&t=524s","sentiment":"positive","topics":["acne","hyperpigmentation"],"mentions_variant":null}]},{"handle":"shelleynayak","display_name":"Shelley Nayak","profile_url":"/creators/shelleynayak","channel_url":"https://www.youtube.com/@shelleynayak","specialty":[],"years_active":null,"subscriber_count":41000,"endorsement_strength":"loves it","is_sponsored":false,"video_titles":["Reviewing 4 Popular Brightening Korean Serums for Dark Spots"],"quotes":[{"text":"So many of you consider this as a vitamin C serum no it's not this is technically your multivitamin serum.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"mixed","topics":["clarification","not vitamin C"],"mentions_variant":null},{"text":"Majorly contains 5% niacinamide, 4% tranexamic acid, and cowberry extract, to brighten up your skin.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["ingredients","brightening"],"mentions_variant":null},{"text":"Formulation is very stable, and it's not vitamin C concentrated product, you can easily store it at the room temperature.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["stable formula","storage"],"mentions_variant":null},{"text":"This serum has very very pale yellow cushy kind of a texture and when you apply it on your skin it feels very hydrating on the skin.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["texture","hydrating"],"mentions_variant":null},{"text":"It's not gonna feel sticky but it will feel very hydrating on the skin.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["texture","hydrating","non-sticky"],"mentions_variant":null},{"text":"I feel every skin type can use it.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["all skin types"],"mentions_variant":null},{"text":"This numbuzin serum does work in fading your red acne marks and brown acne marks.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["red acne marks","brown acne marks","results"],"mentions_variant":null},{"text":"You should be able to see a huge difference if you use it daily for one to two months.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["results","timeframe"],"mentions_variant":null},{"text":"Does add overall glow to your skin and makes your skin very radiant and healthy.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["glow","radiant","healthy skin"],"mentions_variant":null},{"text":"If you have melasma, it's not gonna work on that.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"negative","topics":["melasma","limitations"],"mentions_variant":null},{"text":"If you have very old black marks on your skin, it's not gonna work on it.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"negative","topics":["old black marks","limitations"],"mentions_variant":null},{"text":"This is like a moderate strength multivitamin serum will go well with most of the products.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["moderate strength","compatibility"],"mentions_variant":null},{"text":"I am gonna rate it as 4.5 out of five.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=HsqAruN-FIA","sentiment":"positive","topics":["rating","verdict"],"mentions_variant":null}]},{"handle":"charissedaily","display_name":"Charisse Daily","profile_url":"/creators/charissedaily","channel_url":"https://www.youtube.com/@charissedaily","specialty":["beauty content creator","professional beauty reviewer"],"years_active":11,"subscriber_count":40500,"endorsement_strength":"worth trying","is_sponsored":false,"video_titles":["Best serums for fading acne spots"],"quotes":[{"text":"This one I find is a community favorite.","timestamp_start":null,"timestamp_end":null,"timestamp_start_formatted":null,"video_url":"https://www.youtube.com/watch?v=cw9OMev_ZzA","sentiment":"positive","topics":["holy grail"],"mentions_variant":null},{"text":"The texture of this is slightly viscous but it absorbs well and layers beautifully under my moisturizer.","timestamp_start":311.12,"timestamp_end":320.639,"timestamp_start_formatted":"5:11","video_url":"https://www.youtube.com/watch?v=cw9OMev_ZzA&t=311s","sentiment":"positive","topics":["texture","absorption","ease of use"],"mentions_variant":null},{"text":"It's known as a brightening cocktail because it's loaded with ingredients that target both PIE and PIH.","timestamp_start":320.639,"timestamp_end":333.12,"timestamp_start_formatted":"5:20","video_url":"https://www.youtube.com/watch?v=cw9OMev_ZzA&t=320s","sentiment":"positive","topics":["brightening"],"mentions_variant":null},{"text":"I find that this serum can give you a glow up over two to three weeks of use, especially improving overall clarity and the tone of your skin.","timestamp_start":347.36,"timestamp_end":355.919,"timestamp_start_formatted":"5:47","video_url":"https://www.youtube.com/watch?v=cw9OMev_ZzA&t=347s","sentiment":"positive","topics":["glow","brightening"],"mentions_variant":null},{"text":"This one can cause minor purging if your skin is not used to multiple brighteners, especially if your skin can't handle niacinamide and vitamin C derivatives together.","timestamp_start":355.919,"timestamp_end":367.84,"timestamp_start_formatted":"5:55","video_url":"https://www.youtube.com/watch?v=cw9OMev_ZzA&t=355s","sentiment":"cautionary","topics":["sensitive skin"],"mentions_variant":null},{"text":"I think that this is great for people who have both red and brown marks and want an allrounder serum.","timestamp_start":371.12,"timestamp_end":379.68,"timestamp_start_formatted":"6:11","video_url":"https://www.youtube.com/watch?v=cw9OMev_ZzA&t=371s","sentiment":"positive","topics":["brightening","suitable for all skin types"],"mentions_variant":null},{"text":"The only downside that I find with this serum is that it's not ideal if your skin is extremely sensitive or currently breaking out badly.","timestamp_start":379.68,"timestamp_end":388.24,"timestamp_start_formatted":"6:19","video_url":"https://www.youtube.com/watch?v=cw9OMev_ZzA&t=379s","sentiment":"cautionary","topics":["sensitive skin"],"mentions_variant":null}]},{"handle":"val_foche","display_name":"Val Foché","profile_url":"/creators/val_foche","channel_url":"https://www.youtube.com/@val_foche","specialty":["beauty content creator","based in the EU"],"years_active":null,"subscriber_count":14300,"endorsement_strength":"mentions","is_sponsored":false,"video_titles":["Yesstyle skincare bestsellers review","Unsponsored review of viral K-beauty skincare"],"quotes":[{"text":"Honestly, I didn't see any effect on my skin, any difference after using it for some time.","timestamp_start":1294.8,"timestamp_end":1301.64,"timestamp_start_formatted":"21:34","video_url":"https://www.youtube.com/watch?v=cAt9fJ-WApc&t=1294s","sentiment":"negative","topics":["no effect"],"mentions_variant":null},{"text":"I forgot about this product and after some time, I just decluttered it because it didn't do anything for my skin.","timestamp_start":1304.08,"timestamp_end":1308.36,"timestamp_start_formatted":"21:44","video_url":"https://www.youtube.com/watch?v=cAt9fJ-WApc&t=1304s","sentiment":"negative","topics":["decluttered","no effect"],"mentions_variant":null},{"text":"I can't even say anything about it because it was like nothing.","timestamp_start":1310.4,"timestamp_end":1313.48,"timestamp_start_formatted":"21:50","video_url":"https://www.youtube.com/watch?v=cAt9fJ-WApc&t=1310s","sentiment":"negative","topics":["ineffective"],"mentions_variant":null},{"text":"I haven't noticed any specific effects.","timestamp_start":279.6,"timestamp_end":285.04,"timestamp_start_formatted":"4:39","video_url":"https://www.youtube.com/watch?v=n2JuyldD00g&t=279s","sentiment":"negative","topics":["ineffective"],"mentions_variant":null},{"text":"I didn't notice any brightening or improvement in post acne.","timestamp_start":298.639,"timestamp_end":304.8,"timestamp_start_formatted":"4:58","video_url":"https://www.youtube.com/watch?v=n2JuyldD00g&t=298s","sentiment":"negative","topics":["brightening","post-acne"],"mentions_variant":null},{"text":"It could be that in comparison to those, this one is just not as effective for me.","timestamp_start":314,"timestamp_end":317.84,"timestamp_start_formatted":"5:14","video_url":"https://www.youtube.com/watch?v=n2JuyldD00g&t=314s","sentiment":"mixed","topics":["comparison","retinol"],"mentions_variant":null}]}],"limitations":["Evidence-tag coverage is creator-dependent. Absence of a skin tone, white-cast, fragrance-free, fungal-acne-safe, or pregnancy-safe tag means not stated, not false.","Evidence is from YouTube creators only — not clinical trials or dermatologist studies."]}}