Slugging, beef tallow and salmon sperm: A dermatologist answers your questions.
Dermatologist Dr. A. J. Seine addresses popular skincare trends and myths, such as the use of beef tallow and salmon sperm in beauty products. He clarifies the scientific evidence behind these ingredients compared to effective dermatological practices.
Why it matters
As social media drives viral skincare trends, expert medical advice is essential to help consumers distinguish between effective science and marketing hype.
New Zealand dermatologist Dr A. J. Seine unpacks the catchy marketing from the actual science.
Sunday Morning 15 July 2026 11 min read Photo credit: Unsplash There's plenty of noise out there about the effectiveness of urea, beef tallow and skin creams that penetrate 10 layers deep - but how much of it stacks up?
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