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Title: "Boots Unveils Gen Z-Focused TikTok-Trending Supplements with Lion’s Mane, Ashwagandha & Sea Moss"

Rationale:

• Active verb: "Unveils" emphasizes a launch.
• Audience: "Gen Z-Focused" clarifies the target.
• Trend context: "TikTok-Trending" merges platform influence and ingredient popularity.
• Key ingredients: Highlights lion’s mane, ashwagandha (corrected from typo), and sea moss.
• Concise: 15 words, meeting the length requirement.