Fanta Lemon usually contains the following ingredients:
• Water
• Sugar or other sweeteners (e.g. glucose syrup)
• Lemon juice concentrate
• Carbon dioxide (for sparkling refreshment)
• Acidifier (usually citric acid)
• Flavors (including natural lemon flavor)
• Colourings and preservatives (depending on the recipe, colours such as beta-carotene may be included)
• Vitamin C (ascorbic acid, often used as an antioxidant)

The exact composition can vary depending on the market and recipe, but Fanta Lemon is known for its refreshing lemony taste with a pleasant sweetness and fizzy carbonation.