Is your Cacao tested for Heavy Metals like Lead, Cadmium, Mercury and Arsenic?
Elements Dark Chocolate: A Quantitative Assessment of Heavy Metal Burden Against Industry Benchmarks
Third-party certified analysis of cadmium, lead, mercury, and arsenic in Elements 70% dark chocolate, benchmarked against California Prop 65 MADLs and the Consumer Reports 2023 industry survey of 28 dark chocolate bars.
The heavy metals problem in dark chocolate
In December 2022, Consumer Reports published a detailed analysis of heavy metal concentrations in 28 commercially available dark chocolate bars representing 21 brands. The findings were significant: cadmium (Cd) and lead (Pb) were detected in every product tested, and 23 of 28 bars exceeded California Proposition 65 Maximum Allowable Dose Levels (MADLs) for at least one metal when consumed at the FDA reference amount of 1 oz (28g) per occasion.
The MADL thresholds — 0.5 µg/day for lead and 4.1 µg/day for cadmium — are set by California's Office of Environmental Health Hazard Assessment (OEHHA) to represent exposure levels associated with reproductive toxicity endpoints. No federal food limits exist for these metals; Prop 65 MADLs are among the most health-protective standards available globally.
Heavy metal accumulation in cacao occurs via two distinct pathways. Cadmium is a soil-to-root bioaccumulator, concentrated in the bean's cocoa solids. Lead is primarily a post-harvest contaminant, deposited via soil and dust during open-air bean drying and fermentation. Both accumulate in human tissue over time — cadmium with a biological half-life of 10–30 years, and lead with no established safe threshold, particularly for developing children.
Understanding which fraction carries the metal load
Not all components of a chocolate bar contribute equally to heavy metal exposure. Heavy metals concentrate in the cacao mass (cocoa solids) — the fibrous, flavanol-rich component of the cacao bean. They are not present in cacao butter (a refined fat) or coconut sugar.
Each Elements bar is 50g with a serving size of 12.5g. Applying the cacao mass fraction of 50%, the metal-bearing portion per serving is 6.25g. A simplistic calculation applying the total cacao percentage (70%) would overstate exposure by 40% — the kind of precision that matters when you're publishing numbers publicly.
Cacao mass is the pure, unsweetened, and unrefined liquid or solid produced by grinding fermented and roasted cocoa beans (nibs).
Elements 3rd Party Laboratory results
Elements commissioned an independent analysis of its cacao supply through AGRORUM S.A., an SAE-accredited laboratory (Accreditation N° SAE LEN 19-015). Testing was conducted January 28–31, 2025 using graphite furnace atomic absorption spectrometry and hydride generation methods on raw cacao grain.
In absolute terms: one Elements serving delivers an estimated 1.5 µg of cadmium and 0.063 µg of lead. Mercury and arsenic are effectively negligible at 0.041 µg and <0.375 µg respectively.
How Elements compares to the broader dark chocolate market
Consumer Reports' 2023 study classified dark chocolate bars by whether a single serving exceeded Prop 65 MADLs for lead, cadmium, or both. Of 28 bars tested, only 5 came in below limits for both metals. Elements, calculated at its actual serving size and accurate cacao mass fraction, places at the top of the safest tier.
| Category | Cd % of MADL | Pb % of MADL | Classification |
|---|---|---|---|
| Elements Dark 70% ✦ | 36.6% | 12.5% | Pretty much on the top! |
| CR "safer" brands (5 of 28) | 39–96% | 14–63% | Both within limits |
| Brands exceeding Cd only (6 of 28) | >100% | <100% | Exceeds Cd limit |
| Brands exceeding Pb only (8 of 28) | <100% | 116–265% | Exceeds Pb limit |
| Brands exceeding both (5 of 28) | 100–229% | 100–265% | Exceeds both limits |
✦ Elements calculated at 12.5g serving / 6.25g cacao mass (50% fraction). CR brand data at 28g (1 oz) FDA reference serving. Ranges reflect the spread within each CR tier across 28 bars tested.
To review the full Consumer Reports methodology and data in detail:
Read the full Consumer Reports dark chocolate study →Bottom line: Elements dark chocolate delivers cadmium at 36.6% and lead at 12.5% of California Prop 65 MADLs per serving — calculated accurately using only the cacao mass fraction. Both values fall not just within safe limits, but below every brand Consumer Reports identified as lower-risk in its 2023 industry survey.
Source, soil, and supply chain integrity
Elements sources its cacao from ECURIOLINDO in Ecuador — a region recognized for fine-flavor cacao grown in Andean volcanic soils with naturally lower cadmium concentrations than high-contamination origins. The 0.24 mg/kg cadmium reading sits well below the EU maximum limit of 0.60 mg/kg for cacao beans, and the 0.01 mg/kg lead result reflects tightly controlled post-harvest drying and handling practices.
Elements commits to batch-level third-party testing as standard operating procedure, with results made publicly available. Transparency is not a marketing exercise, it is the floor, not the ceiling, of what consumers deserve to know about what they eat.
