Electrolytes comparison: lab tests, heavy metals and price (UK + EU)

4 products, 2 lab verified: a current independent lab report we have checked. Others have an outdated report, reporting limits too high to be useful, or no report. Figures come only from published reports and seller pages; β€œβ€”β€ means we have no data, never an estimate.

About electrolytes ↓

Tap a column heading to sort. Price sorting groups by currency (€, then Β£, then others), so € and Β£ are never mixed.

Heavy metals (mg/kg)Label matchFillersForm & servingSellersRed flags
#1Heiltropfen Potassium Citrate Powder 600gHeiltropfenLab verified26 Feb 2026Report<0.01 (well under the EU limit or below detection)<0.003 (well under the EU limit or below detection)<0.01 (well under the EU limit or below detection)0.032 (no EU limit)β€”β€”β€”β€”
⚠ 1 red flag
  • Sample sent in by the brand: check the batch number on your pack.
#2MoleQlar Elektrolyte SticksMoleQlarLab verified8 Jul 2026Report0.065 (well under the EU limit or below detection)<0.010 (well under the EU limit or below detection)<0.010 (well under the EU limit or below detection)0.040 (no EU limit)β€”β€”β€”β€”
⚠ 1 red flag
  • Sample sent in by the brand: check the batch number on your pack.
#3natural elements Elektrolyte Sticks Workoutnatural elementsPartial reportReportNT (not tested)NT (not tested)NT (not tested)NT (not tested)β€”β€”β€”β€”
⚠ 2 red flags
  • Public CoA is pass/fail without clear numeric metal values in extract β€” Partial.
  • Sample sent in by the brand: check the batch number on your pack.
#4natural elements Kalium Kapselnnatural elementsPartial reportReportNT (not tested)NT (not tested)NT (not tested)NT (not tested)β€”β€”β€”β€”
⚠ 2 red flags
  • Public CoA is pass/fail without clear numeric metal values in extract β€” Partial.
  • Sample sent in by the brand: check the batch number on your pack.
Heavy-metal colours: Well under the EU limit (below half) or below detection Near the EU limit (half the limit up to the limit) Over the EU limit Grey: no EU limit (arsenic), not tested, or the lab’s reporting limit is above the EU limitEU 2023/915 limits for food supplements: lead (Pb) 3.0, cadmium (Cd) 1.0, mercury (Hg) 0.10 mg/kg. Values in mg/kg. NT = not tested; c = calculated by us from Β΅g per serving.

Pb = lead, Cd = cadmium, Hg = mercury, As = arsenic, all in mg/kg. β€œ<” means below the lab’s detection limit. Pass* = certificate states compliance without a figure. β€” = no data. Label match = the lab measured the active content against the label. The lab name, full notes and per-serving details are on each product page.

#1

Heiltropfen Potassium Citrate Powder 600g

Brand
Heiltropfen
Lab-test status
Lab verified26 Feb 2026Report
Heavy metals (mg/kg)
Pb <0.01 (well under the EU limit or below detection)Cd <0.003 (well under the EU limit or below detection)Hg <0.01 (well under the EU limit or below detection)As 0.032 (no EU limit)
Label match
β€”
Fillers
β€”
Form & serving
β€”
Price per daily dose
β€”
Sellers
Red flags
⚠ 1 red flag
  • Sample sent in by the brand: check the batch number on your pack.
#2

MoleQlar Elektrolyte Sticks

Brand
MoleQlar
Lab-test status
Lab verified8 Jul 2026Report
Heavy metals (mg/kg)
Pb 0.065 (well under the EU limit or below detection)Cd <0.010 (well under the EU limit or below detection)Hg <0.010 (well under the EU limit or below detection)As 0.040 (no EU limit)
Label match
β€”
Fillers
β€”
Form & serving
β€”
Price per daily dose
β€”
Sellers
Red flags
⚠ 1 red flag
  • Sample sent in by the brand: check the batch number on your pack.
#4

natural elements Kalium Kapseln

Brand
natural elements
Lab-test status
Partial reportReport
Heavy metals (mg/kg)
Pb NT (not tested)Cd NT (not tested)Hg NT (not tested)As NT (not tested)
Label match
β€”
Fillers
β€”
Form & serving
β€”
Price per daily dose
β€”
Sellers
Red flags
⚠ 2 red flags
  • Public CoA is pass/fail without clear numeric metal values in extract β€” Partial.
  • Sample sent in by the brand: check the batch number on your pack.
Heavy-metal colours: Well under the EU limit (below half) or below detection Near the EU limit (half the limit up to the limit) Over the EU limit Grey: no EU limit (arsenic), not tested, or the lab’s reporting limit is above the EU limitEU 2023/915 limits for food supplements: lead (Pb) 3.0, cadmium (Cd) 1.0, mercury (Hg) 0.10 mg/kg. Values in mg/kg. NT = not tested; c = calculated by us from Β΅g per serving.

EU 2023/915 limits for food supplements: lead 3.0, cadmium 1.0, mercury 0.10 mg/kg. β€œPass (no value)” means the certificate states compliance without a figure. Prices were seen on seller pages when checked and can change; currencies differ, so compare within one currency.

Not medical advice. Testing status can’t be bought; seller links may be affiliate links (see disclosure). Disclosure

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