The ingredients for Hübner Skin Hair Nails Direct sticks vary by flavor, but common components includesilica gelandfruit puree(like apricot or red fruit). Depending on the version, they also containbiotin, selenium, fructose, pectin, and xanthan gum, according to sources likeAmazon.de,Violey, andthis eBay listing.Key ingredients

• Silica gel: The main active ingredient, providing silicon.
• Fruit puree: Adds flavor and sweetness. Apricot and red fruit are common options.
• Biotin: A vitamin that contributes to the maintenance of normal skin and hair.
• Selenium: A trace element that contributes to the maintenance of normal hair and nails.
• Other common ingredients: Thickeners like pectin and xanthan gum, acidifiers such as malic acid or citric acid, and sometimes fructose or a natural aroma. 

Ingredient variations

• Apricot flavor: Includes apricot puree, with other ingredients like silica gel, fructose, malic acid, biotin, and sodium selenite.
• Red fruit flavor: Contains a mix of red fruit juices (like elderberry and blackcurrant) and is formulated with silica gel, biotin, selenium, and thickeners.
• Collagen Complex: This product is different and contains ingredients such as collagen peptides, silica gel, mango puree, and sodium hyaluronate.