Glycine comparison: lab tests, heavy metals and price (UK + EU)
6 products, 4 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 Others have an outdated report, reporting limits too high to be useful, or no report.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.
Heavy-metal colours:0.01 Well under the EU limit (below half) or below detection▲1.6 Near the EU limit (half the limit up to the limit)■3.2 Over the EU limit0.30 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.
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)
Pb<0.5 (well under the EU limit or below detection)Cd<0.05 (well under the EU limit or below detection)Hg<0.005 (well under the EU limit or below detection)As<0.5 (well under the EU limit or below detection)
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)
PbPass* (certificate states compliance, no figure)CdPass* (certificate states compliance, no figure)HgPass* (certificate states compliance, no figure)AsPass* (certificate states compliance, no figure)
Heavy-metal colours:0.01 Well under the EU limit (below half) or below detection▲1.6 Near the EU limit (half the limit up to the limit)■3.2 Over the EU limit0.30 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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About Glycine
What it is
The simplest amino acid, found in protein foods and gelatin.
Common forms
Sweet-tasting powder or capsules.
Typical label doses
The label in our directory gives 5 g a day.
Research
Studied for sleep quality. Study findings are not authorised claims.
There are no authorised EU or GB health claims for this ingredient, so we do not describe any benefits.
Information only, not medical advice. Food supplements are not intended to diagnose, treat, cure or prevent any disease. Speak to a healthcare professional before use, especially if pregnant or on medication.
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