我们好歹看了一堆皮肤科医生科普视频，楼主定期看皮肤科医生，您不是谷歌的？ It’s actually the opposite, topical (creams/lotions) retinoids (like Retin A, retinol, tretinoin, Differin, etc) REDUCE skin cancers. Can you send me the link to that “study” through the SkinTour Questions? I’d love to pull that paper and evaluate it. Twenty-five years of experience in thousands of dermatology offices worldwide is a good indicator too. We use retinoids to reduce precancerous spots (actinic keratoses), and to help prevent more skin cancers and wrinkles. In addition, studies have also shown that, when used in a cream as prescribed, it is not absorbed into the bloodstream when measured. Ways to evaluate what you read on the web: Notice the language. Often misinformation will use generalities. For example, did this web info say which kind of cancer they were referring to? Did they put the study in the web piece? Are they selling something that competes with Retin A? Does it make sense? For example, retinoids are used at night because light inactivates them. Sunscreens are used in the morning and reapplied during the day. They aren’t applied at the same time, so they don’t really interact with each other. How long has a product or drug been in use? When a cream (like Retin A) or drug has been in use for more than 20-30 years, it has been used by millions of patients. Consequently, the side effects have been reported and tracked. I don’t know about you, but I try not to use any drug that hasn’t been around at least 5-10 years because the side effect profile is more complete. Fear Mongering. This is a proven and often used tactic on the web. Try to activate peoples’ fear of something……anything……and they are more likely to click on it. It’s awful! If we pay attention to that “fine level of feeling” in us, we’ll notice it. Once we notice it, we can teach ourselves not to react to senseless fears. For example, meditation is a good tool for this, and life becomes far more peaceful. PREGNANCY WARNING: Your obstetrician (baby doctor) will counsel you not to take capsules or any oral vitamin A supplements. I’ll let them explain it to you. During pregnancy, we recommend that you NOT use retinoid creams, just to be super careful. Hope this helps! Dr. Brandith Irwin Founder, SkinTour Director, Madison Skin & Laser Center
河边垂钓 发表于 2025-07-20 16:47 我们好歹看了一堆皮肤科医生科普视频，楼主定期看皮肤科医生，您不是谷歌的？ It’s actually the opposite, topical (creams/lotions) retinoids (like Retin A, retinol, tretinoin, Differin, etc) REDUCE skin cancers. Can you send me the link to that “study” through the SkinTour Questions? I’d love to pull that paper and evaluate it. Twenty-five years of experience in thousands of dermatology offices worldwide is a good indicator too. We use retinoids to reduce precancerous spots (actinic keratoses), and to help prevent more skin cancers and wrinkles. In addition, studies have also shown that, when used in a cream as prescribed, it is not absorbed into the bloodstream when measured. Ways to evaluate what you read on the web: Notice the language. Often misinformation will use generalities. For example, did this web info say which kind of cancer they were referring to? Did they put the study in the web piece? Are they selling something that competes with Retin A? Does it make sense? For example, retinoids are used at night because light inactivates them. Sunscreens are used in the morning and reapplied during the day. They aren’t applied at the same time, so they don’t really interact with each other. How long has a product or drug been in use? When a cream (like Retin A) or drug has been in use for more than 20-30 years, it has been used by millions of patients. Consequently, the side effects have been reported and tracked. I don’t know about you, but I try not to use any drug that hasn’t been around at least 5-10 years because the side effect profile is more complete. Fear Mongering. This is a proven and often used tactic on the web. Try to activate peoples’ fear of something……anything……and they are more likely to click on it. It’s awful! If we pay attention to that “fine level of feeling” in us, we’ll notice it. Once we notice it, we can teach ourselves not to react to senseless fears. For example, meditation is a good tool for this, and life becomes far more peaceful. PREGNANCY WARNING: Your obstetrician (baby doctor) will counsel you not to take capsules or any oral vitamin A supplements. I’ll let them explain it to you. During pregnancy, we recommend that you NOT use retinoid creams, just to be super careful. Hope this helps! Dr. Brandith Irwin Founder, SkinTour Director, Madison Skin & Laser Center
我们好歹看了一堆皮肤科医生科普视频，楼主定期看皮肤科医生，您不是谷歌的？ It’s actually the opposite, topical (creams/lotions) retinoids (like Retin A, retinol, tretinoin, Differin, etc) REDUCE skin cancers. Can you send me the link to that “study” through the SkinTour Questions? I’d love to pull that paper and evaluate it. Twenty-five years of experience in thousands of dermatology offices worldwide is a good indicator too. We use retinoids to reduce precancerous spots (actinic keratoses), and to help prevent more skin cancers and wrinkles. In addition, studies have also shown that, when used in a cream as prescribed, it is not absorbed into the bloodstream when measured. Ways to evaluate what you read on the web: Notice the language. Often misinformation will use generalities. For example, did this web info say which kind of cancer they were referring to? Did they put the study in the web piece? Are they selling something that competes with Retin A? Does it make sense? For example, retinoids are used at night because light inactivates them. Sunscreens are used in the morning and reapplied during the day. They aren’t applied at the same time, so they don’t really interact with each other. How long has a product or drug been in use? When a cream (like Retin A) or drug has been in use for more than 20-30 years, it has been used by millions of patients. Consequently, the side effects have been reported and tracked. I don’t know about you, but I try not to use any drug that hasn’t been around at least 5-10 years because the side effect profile is more complete. Fear Mongering. This is a proven and often used tactic on the web. Try to activate peoples’ fear of something……anything……and they are more likely to click on it. It’s awful! If we pay attention to that “fine level of feeling” in us, we’ll notice it. Once we notice it, we can teach ourselves not to react to senseless fears. For example, meditation is a good tool for this, and life becomes far more peaceful. PREGNANCY WARNING: Your obstetrician (baby doctor) will counsel you not to take capsules or any oral vitamin A supplements. I’ll let them explain it to you. During pregnancy, we recommend that you NOT use retinoid creams, just to be super careful. Hope this helps! Dr. Brandith Irwin Founder, SkinTour Director, Madison Skin & Laser Center 河边垂钓 发表于 2025-07-20 16:47
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这是唯一科学证实可以抗老逆转紫外线伤害的成分 可以跟她分享一下哦
谢谢楼主分享 你有没有查浓度？两个一样吗？
我从adapalene开始 然后 0.025 0.05 去年底进阶0.1 已经用了三年多啦 还有我想说0.1的效果跟0.025还是有差的 能tolerate推荐增加浓度
一样啊 包装上面有
我也是怀疑楼主一来上得浓度太大了 我开始没敢上tretinoid ，只敢用强度低一级的达夫林都适应了好久
哦，了解了，那这么缓慢还有反应吗？我现在刷国产的没反应了，挺好的，之前部分反应
不用为楼主操心啦 楼主每年跟皮肤科医生聊很多次 还scan皮肤状况 皮肤很好的
国产的反应很大呢 很可惜因为那么便宜 今年回国打算再买两个低浓度的再测试一下
网上查了一下，这东西 真的是 用来 当护肤品用的？？？
维A酸乳膏在医生的指导下是可以用来擦脸的。 维A酸软膏它是应用于面部的一种药物乳膏制剂，涂抹在脸上可以去除角化过度增生的角质层细胞，可以用于角化过度的皮肤疾病，比如黑头粉刺、白头粉刺以及肥厚慢性湿疹。但是面部使用这个药物，必须要确定适应症，比如面部有寻常痤疮、毛囊角化病、扁平疣等这类情况，可以局部涂抹，用药治疗。如果是不明原因的面部皮肤问题，是不能随意使用维A酸乳膏擦脸的。建议应先就诊医院皮肤科，明确病因后，遵医嘱后再使用药物治疗。 维A酸乳膏这种药物具有光敏性，用药后要注意防晒，因为阳光作用容易诱发用药处的皮肤过敏，所以不能大面积使用。通常推荐在睡前使用一次，如果在点涂维A酸乳膏后出现明显的红肿、刺痛等不适症状，应当适当减少用量或者停药
一般就是formulation 的问题了 虽然有效成分一样 Formulation不同效果和副作用差别很大 类似原研药和仿制药的差别
英文资料不是这么说的哦 我发现中文的很多资料都不太正确呢
确实有反应，我还以为A酸都有呢，不过我现在刷0.05%的已经没问题了，十分光滑😂
我之前低浓度也用过美国版generic 跟name brand没这么大区别 应该说完全没区别 国产的可能真的差一点
你可以看看油管上皮肤科医生讨论A酸的片子，台湾的很多医生在教大家怎么刷
角质层变薄但真皮层变厚啊 刺激胶原蛋白合成皮肤更澎更滑更光泽肤色均匀淡化皱纹
真皮层变厚没有什么用，锁水的主要靠角质层，角质层薄会出现很多皮肤问题，角质层变薄或受损，皮肤屏障功能下降，水分更容易蒸发，皮肤就容易变干、发红、刺痛。最大的问题就是容易长晒斑，皮肤科常识啊
只是最开始 耐受就不会了 保湿屏障保护最好就好了 而且一定要防晒 刷不刷酸都要防晒的 a酸可以逆转晒斑的
医生不建议这样 因为你mix的可能不均匀 会有hot spots 直接降低浓度或者间隔久一点
这不是逆转，这跟激光祛斑原理一样，把表面的一层黑色素给你去掉，视觉看上去淡一些，但激光那个是一次性的，刷酸可是天天在去除角质层刺激皮肤的
多谢楼主 亲身经历推荐。每太懂，就是图里这两个， 第一个是美国的， 第二个是中国的？ 第二个中国的这个牌子（华邦）也管用？“迪维” 是另外一个牌子？我觉得买国货的盯住产家， 牌子， 不然不放心，哪怕是药
维A酸乳膏能抹脸，但需谨慎使用。它常用于治疗痤疮、角化异常等皮肤问题。不过，因其具有一定刺激性，并非所有人都适合，使用不当易引发不良反应。 维A酸乳膏可调节表皮细胞增殖和分化，改善毛囊皮脂腺导管角化，抑制痤疮丙酸杆菌生长。正因能重塑皮肤结构，才对脸部皮肤问题有疗效。但也正因如此，使用初期可能刺激皮肤，引起红斑、脱屑等。 皮肤敏感者，如天生角质层薄、易过敏人群，使用维A酸乳膏抹脸更要小心。这类人皮肤屏障功能弱，药物刺激性更易导致皮肤不适，甚至加重原有问题。 使用维A酸乳膏前，先在耳后小面积试用，观察有无过敏反应。建议睡前涂抹，避免日光照射，因其可能增加皮肤对紫外线敏感性。 使用时，从低浓度、小面积开始，逐渐增加使用范围和频率。若出现严重灼烧感、肿胀等，立即停药并就医。不要与其他刺激性护肤品同时使用，保护皮肤屏障
去皱啊
一张脸看着老不老跟皱纹没有多少关系，老美高中女生都一脸皱纹一样看着年轻，主要是跟脸上各种肌肉的位置有关系，年级大了重力作用各种肌肉都移位加上发腮，所以看着老
你这评论太搞笑了。a酸有祛皱让脸禁止饱满的作用，它不是拉皮手术，但绝对延缓衰老。 我都想把我照片发给你，一想还是算了哈哈
你才多大呢，哪有说服力
肌肤自我修复能力都被替代了
40+俩娃妈啦，但冒充95后没压力。爱信不信哈
谢谢提醒，我用的A酸是Tretinoin， 效果不错，最近皮肤比几年前没用之前好不少。不过我白天目前还在用VC， 感觉A酸白天用有点油？我皮肤混合皮
说你小呢，等更年期再来对话吧。40+被当作30又不罕见，我自己就是，好几个朋友也是
也刷过高浓度果酸 水杨酸（医美） 我感觉真没啥用 我还是痘皮 刷完爆更多
痘皮对我来说 最有效就是戒牛奶 我只要把牛奶换豆浆 就几乎不长痘
一盒牛奶 就爆得厉害
抹啥都没用
可是我超级爱牛奶 虽然豆浆也很爱
你好癫啊 白天用a酸
我夏天晚上都不会用 只有冬天晚上用 第二天捂着
你可拉倒吧 我就是95后 我看起来像14岁你信不信。。。
都尼玛自欺欺人
其实就是换肤，皮肤可更换次数是有限的，想想香港明星郑裕玲现在的样子（过度依赖换肤带来永远的伤害）
95后这么媚男的真不多了，有点悲哀啊
她的是chemical peel？两回事吧
理论上是一样的，区别是慢慢换和快速换，都是酸性化合物去掉表层衰老的皮肤，新的张出来没有皱纹，痘痘和黑斑
可以给个链接吗？ ChatGPT认为没啥大问题，注意防晒啥的，降低浓度预防长期发炎 你提到“每天晚上刷维A酸”（指 Tretinoin 维A酸），确实会有一些常见的副作用和需要注意的长期影响。这里是专业的说明，帮你了解得更清楚：
常见副作用（特别是前几个月）：
干燥、紧绷、刺痛、脱皮、红斑 敏感性增强（对日晒、风吹冷空气） 暂时性爆痘（皮肤净化反应）
关于“皮肤自主换肤能力变差”的问题：
这类说法网上有，但从医学角度来说：
维A酸 不会让皮肤失去自主代谢能力，也不会“依赖”它来换肤。 它是 促进角质正常代谢、减缓角质堵塞，长期使用有助于维持皮肤健康代谢。 一些人停用后会觉得皮肤“变差”，其实是恢复了原本的问题（比如油脂分泌、粉刺），或者是皮肤适应了后突然撤药，产生反跳现象。
长期使用的专业看法：
安全：在医生指导下，长期低剂量使用是安全的（很多人用了十几年，甚至更久） 避免高频刷酸：如果是“高浓度+每天刷”，刺激过度会破坏皮肤屏障，产生慢性炎症，反而变敏感 需要配合保湿和防晒 使用周期建议：初期 2-3 次/周，逐渐耐受后根据情况调整
如果你担心皮肤耐受或“变懒”：
可以考虑：
每周留1-2天不使用 交替使用温和修复类产品（如神经酰胺、角鲨烷） 注意防晒，避免光老化叠加伤害
你老婆不用不等于你孩子以后不用。你家那饮食结构，孩子在青春期需要这个A酸的可能性太大了。
A酸是青春痘的终极杀手。美国青春期孩子最后要用这个药的非常多。不过这边孩子用的是口服药物，这种外用的，作用不太够吧。
靠chatgpt和当年百度看病的是一群人吧
我们好歹看了一堆皮肤科医生科普视频，楼主定期看皮肤科医生，您不是谷歌的？ It’s actually the opposite, topical (creams/lotions) retinoids (like Retin A, retinol, tretinoin, Differin, etc) REDUCE skin cancers. Can you send me the link to that “study” through the SkinTour Questions? I’d love to pull that paper and evaluate it. Twenty-five years of experience in thousands of dermatology offices worldwide is a good indicator too. We use retinoids to reduce precancerous spots (actinic keratoses), and to help prevent more skin cancers and wrinkles. In addition, studies have also shown that, when used in a cream as prescribed, it is not absorbed into the bloodstream when measured. Ways to evaluate what you read on the web: Notice the language. Often misinformation will use generalities. For example, did this web info say which kind of cancer they were referring to? Did they put the study in the web piece? Are they selling something that competes with Retin A? Does it make sense? For example, retinoids are used at night because light inactivates them. Sunscreens are used in the morning and reapplied during the day. They aren’t applied at the same time, so they don’t really interact with each other. How long has a product or drug been in use? When a cream (like Retin A) or drug has been in use for more than 20-30 years, it has been used by millions of patients. Consequently, the side effects have been reported and tracked. I don’t know about you, but I try not to use any drug that hasn’t been around at least 5-10 years because the side effect profile is more complete. Fear Mongering. This is a proven and often used tactic on the web. Try to activate peoples’ fear of something……anything……and they are more likely to click on it. It’s awful! If we pay attention to that “fine level of feeling” in us, we’ll notice it. Once we notice it, we can teach ourselves not to react to senseless fears. For example, meditation is a good tool for this, and life becomes far more peaceful. PREGNANCY WARNING: Your obstetrician (baby doctor) will counsel you not to take capsules or any oral vitamin A supplements. I’ll let them explain it to you. During pregnancy, we recommend that you NOT use retinoid creams, just to be super careful. Hope this helps! Dr. Brandith Irwin Founder, SkinTour Director, Madison Skin & Laser Center
不好意思啊 我不是google的呢
我觉得夏虫不可语冰 你自己开心就好 不要出来误导人呢
正经皮肤科医生很少出来免费科普给自己找麻烦 你能看到的大都是搞医美的 这就良莠不齐噜 再加上大妈没有鉴别能力 又一窝蜂一窝蜂的贼有勇气 哎
还有研究说维甲酸能治疗癌症呢 无良医生怎么不拿这话忽悠你 没进指南医生不敢写进病历的就不要瞎用 对自己有盲目自信也不是用到这里的 你完全可以选更安全的方法
你有多学点东西就好咯 希望你能心怀感激 🥹 我救了你一命 你以后对我说话客气点
我本来就不涂，你自嗨吧
医美的医生不怕有麻烦？
唔 你不涂🤔
你是npd吗 睁眼说瞎话
我本来就白天不涂，你看不清就不要乱回话，浪费我时间。再见！
唔🤔 嘴硬呢
他們家的真的不刺激 可能都幫配好了
你去看看癌症中心的文章，白天用会对光敏感，都没敢说致癌，你的结论倒是比他们厉害了
你不要做二极管 你再看看别的研究报道呢
那可不是我的结论
我觉得你在占我便宜 我才不帮你找
这是最好的癌症中心了，懒得和你掰扯了，爱谁谁
嗯 不要瞎买药品 买大牌护肤品还是比较安全的
我真的很不理解有的大妈一听到哎呦什么化妆品里加激素吓得尿裤子，然后处方药自己网上看几句话哐哐抹。。 不怕肝衰吗
哇哦 你是真的有很严重的逻辑谬误耶 我都不知道为什么我要对你这么好 可能因为我是引导型人格吧～
是的，所以说不值得
这不是没办法的办法嘛。这个药物美国医保超龄就不报销了，还挺贵。。。
国产的不贵 美国买真不便宜。
美国医疗真是害青少年，它不普及健康饮食，多多运动好好睡觉。一有问题就开药。后患无穷！
没有链接，根据化学成分判断出来的，大概十几年前一个五十出头的女同事脸上被做化学实验的另一个同事突发喷出的正在处理的微酸性水溶液喷在脸上，过了几天蜕了些皮的皮肤上没有了斑点和皱纹，意识到这就是以前经常听到的广告果酸换肤一个道理，家里孩子脸上长痘痘的时候皮肤科医生给开的药，看到成分知道除痘的原理。皮肤有修复作用，因为长痘痘或者其它原因偶尔用一下A 酸没有问题，但是长期靠这个美容，皮肤修复作用被滥用超过极限，以后后悔也来不及。ChatGPT 得出的结论和google search 很多时候差不多，很多时候就是总结网上能得到的信息，非常专业的知识很多时候是不一定准确的
同没有一点感觉，加强浓度的话应该用什么？
長期用低濃度也可以有效果 我是會幾種不同的輪著用 主要用Obagi Murad ZO skin Arden的金/銀膠 La Praire夜間精華油搭配視情況心情輪著用 一星期大概用2_3天 但煙銑銨就幾乎當打底的日夜都可常用
我就用a酸带一下眼下，没问题，不用眼霜。没细纹