When it comes to genuine New Zealand blackcurrant supplements, you can rely on CurraNZ products to deliver consistent efficacy and quality.
A recent investigation has revealed composition failures in supplements claiming to have New Zealand blackcurrant ingredients being sold locally and internationally.
A 2025 analysis of a sample of New Zealand blackcurrant supplements sold in New Zealand - containing extract or whole fruit powder - showed that three failed their label claim and / or contained very low levels of anthocyanins.
In particular, one product which claimed 105mg of anthocyanin per serving contained just 48mg - or 0.12%.
Last year, a CurraNZ look-alike product, sold in 30-capsule packs for £9.99, on Amazon UK, was found to be adulterated, with the independent laboratory analysis showing the ingredient was ‘unidentifiable’ and contained no recognisable bioactives.
Another pre-workout product in the UK, certified by Informed-Sport and also sold on Amazon UK, boldly claimed 900mg of blackcurrant extract per serving. Trading off the CurraNZ research, our laboratory analysis revealed it contained only 0.01% blackcurrant - a negligible quantity that was a far cry from what they claimed.
In the US, a new GI supplement for runners using New Zealand blackcurrant was found to contain less than a quarter of the dose required to have any efficacy. The brand extensively cites the CurraNZ-specific research, but ignores the dosing in the studies.
In 2022, our investigation into supposedly New Zealand-sourced blackcurrant anthocyanin extracts from manufacturers across Asia revealed variations of up to 437% in anthocyanin content, flagging serious concerns about adulteration.
Additionally, an analysis of pesticide residues contained in some of these extracts were not permitted for use in New Zealand, confirming their fraudulent status and wholly different origin.
Out of five ‘New Zealand’ blackcurrant extract samples tested in that international market analysis, all but one failed to meet quality standards.
These extracts are entering the supplement marketplace internationally, in what is a growing issue of serious food fraud.
This underlines how vital it is for consumers to choose supplements with verifiable ingredient provenance, traceability, batch testing, and regulatory compliance.
If it's cheap, it's unlikely to be genuine because New Zealand’s superior fruit commands a premium price.
CurraNZ sets itself apart through its pharmaceutical-standard consistency, traceability requirements and the Enzans® trademark for our bioactive markers.
For real results, safety, and authenticity, look for products bearing the CurraNZ and Enzans trademarks - the only clinically validated New Zealand blackcurrant supplements you can truly trust.