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

2 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 Others have an outdated report, reporting limits too high to be useful, or no report.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; “—” means we have no data, never an estimate.

About folate ↓

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

Heavy metals (mg/kg)Label matchFillersForm & servingSellersRed flags
#1Sunday Natural Folate Quatrefolic 400 µg, 120 capsules
B 7.7/10
Sunday NaturalLab verified21 Mar 2025Report0.020 (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 (well under the EU limit or below detection)UnknownNone
Capsules
1 capsule a day = 400 µg folate declared
€0.083/day (EU)
calculated: €9.90 ÷ 120 · 1 capsule a day · price incl. VAT, excl. shipping
£0.083/day (UK)
calculated: £9.90 ÷ 120
⚠ 2 red flags
  • Report dated 21 Mar 2025: re-check by March 2027.
  • The sample was sent in by the brand: check the batch number on your pack.
#2Nature Heart Methyl Folat Pure (Quatrefolic) 400 µg, 120 capsules
Score Not enough data
Nature HeartLab verified27 Feb 2026Report0.021 (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 (well under the EU limit or below detection)Unknown—
Capsules
1 capsule a day = 400 µg folate (Quatrefolic) declared
€0.25/day (EU)
calculated: €29.90 ÷ 120 · 1 capsule a day · price incl. VAT, excl. shipping
⚠ 1 red flag
  • The sample was 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 µg per serving.

Pb = lead, Cd = cadmium, Hg = mercury, As = arsenic, all in mg/kg. “<” means below the lab’s detection limit. Pass* = certificate states compliance without a figure. — = 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

Sunday Natural Folate Quatrefolic 400 µg, 120 capsules
B 7.7/10

Brand
Sunday Natural
Lab-test status
Lab verified21 Mar 2025Report
Heavy metals (mg/kg)
Pb 0.020 (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 (well under the EU limit or below detection)
Label match
Unknown
Fillers
None
Form & serving
Capsules
1 capsule a day = 400 µg folate declared
Price per daily dose
€0.083/day (EU)
calculated: €9.90 ÷ 120 · 1 capsule a day · price incl. VAT, excl. shipping
£0.083/day (UK)
calculated: £9.90 ÷ 120
Sellers
Red flags
⚠ 2 red flags
  • Report dated 21 Mar 2025: re-check by March 2027.
  • The sample was sent in by the brand: check the batch number on your pack.
#2

Nature Heart Methyl Folat Pure (Quatrefolic) 400 µg, 120 capsules
Score Not enough data

Brand
Nature Heart
Lab-test status
Lab verified27 Feb 2026Report
Heavy metals (mg/kg)
Pb 0.021 (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 (well under the EU limit or below detection)
Label match
Unknown
Fillers
—
Form & serving
Capsules
1 capsule a day = 400 µg folate (Quatrefolic) declared
Price per daily dose
€0.25/day (EU)
calculated: €29.90 ÷ 120 · 1 capsule a day · price incl. VAT, excl. shipping
Sellers
Red flags
⚠ 1 red flag
  • The sample was 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 µg per serving.

EU 2023/915 limits for food supplements: lead 3.0, cadmium 1.0, mercury 0.10 mg/kg. “Pass (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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