When sourcing these supplements, you must verify the active ingredient concentration, typically ranging from 2,500mcg to 10,000mcg of Biotin and 50mg to 200mg of Collagen per serving. Ensure the collagen source is specified (e.g., Bovine, Marine, or Vegan-alternative) to match your target market's dietary preferences. The gelling agent is also critical; Pectin-based gummies are preferred over gelatin for their heat stability during cross-border shipping and suitability for vegan/vegetarian consumers.