NatureModernglobalhigh confidence

Chocolate products provide approximately 2–35 mg of caffeine per serving.

Notes on verification

Multiple independent nutrition sources, including USDA FoodData Central data, corroborate the 2-35 mg per serving range for chocolate products, though exact values vary by product and cacao content. [tier=silver indep_score=0.574 clusters=5 claim_tier=notable | framework convergence=partial on USDA nutrient database caffeine measurements for chocolate products (upstreams: USDA FoodData Central / USDA National Nutrient Database) — publishers independent, evidence may not be | kind=empirical eligibility=high (extractor: empirical/medium)]

Sources