Blackcurrant Supplements for Over 50s: What Research in Older Adults Can Really Tell Us

After 50, the goals are often wonderfully ordinary: keep walking comfortably, travel when you can, spend time in the garden, stay useful at work, train for the next event, play sport, or simply keep up with family. So if blackcurrant has caught your eye, a fair question is: what has actually been studied in people around your age?

That question matters because over 50 is not one type of person. A healthy 55-year-old who trains several times a week is very different from a sedentary woman in her 70s, and both are different again from someone who is worried about memory changes.

The short answer: Human blackcurrant research in older adults is still fairly small and mixed. Some trials have reported encouraging changes in specific cardiovascular or functional measures, while others found no improvement in cognition or walking performance. Study preparations and designs also differ, so these results cannot automatically be transferred to Kiwi Superfoods Blackcurrant Skin Extract.

Being over 50 is not one research group

Age on its own does not tell us how active someone is, what medicines they take, whether they have a diagnosed condition, what their usual diet looks like, or how they respond to exercise. Those differences can matter in a nutrition study.

Study design matters too. A seven-day crossover trial asks a different question from a three-month study. A trial of a single blackcurrant extract is different from a formula that also contains other active ingredients. And a study where one group increases physical activity cannot tell us what the supplement would have done on its own.

That is why we look at the people, the product they took and the outcome researchers actually measured before getting excited about a result.

What researchers have actually tested in older adults

Seven days, 14 adults, average age about 69

A 2020 crossover study recruited 14 older adults with an average age of about 69. They used a specific New Zealand blackcurrant extract for seven days, then researchers measured resting blood pressure, six-minute walking performance and several cognitive variables.

Blood-pressure measures changed after the blackcurrant period. The six-minute walk result did not improve, and the cognitive measures did not improve either.

That is a useful result precisely because it is not all positive. It suggests that one short study can show movement in one type of measure while showing no effect in others. It does not mean blackcurrant is a treatment for high blood pressure.

Seven days, 14 adults, average age about 73

Another 2020 crossover trial involved 14 older adults with an average age of about 73. After a seven-day specific New Zealand blackcurrant intervention, researchers measured central arterial stiffness and central blood-pressure variables.

Those are interesting vascular findings, but they belong to that research preparation and that short study. If you want the detail on what blood-flow and vascular studies actually measure, see our blackcurrant blood flow research guide.

Thirty older women, plus more physical activity

A 2024 study followed 30 previously sedentary older women, with average ages in the early 70s. Researchers assessed them over one week and again over three months. Walking distance, sit-to-stand performance and life-satisfaction measures improved in the intervention group.

There is a crucial detail, though: the blackcurrant group was also required to increase habitual physical activity. That makes it impossible to say the supplement alone caused the improvements.

For us, that makes the customer conversation more practical. The interesting place for blackcurrant is alongside staying active, not instead of staying active. Our NZ-grown Blackcurrant Skin Extract is easy to add to the day, but it does not replace walking, strength work, good food or the health care that is right for you.

Newer cognitive research makes the picture more mixed, not less

A 2026 randomised trial followed 110 adults aged 60 to 85 who had self-reported memory concerns. Over 24 weeks, participants received either a high-anthocyanin diet, a blackcurrant-derived anthocyanin supplement or placebo. There was no treatment-by-time effect on the primary or secondary outcomes tested.

Then, on 30 September 2026, another study in healthy adults aged 55 and over reported encouraging findings for selected sustained-attention measures after four weeks. But this was not a blackcurrant-only intervention. The formulation contained blackcurrant plus L-theanine and pine bark extract, so it would be wrong to credit the result to blackcurrant alone.

If cognition is your main reason for looking at supplements, our brain health supplements guide goes into that evidence in more detail.

What these trials still cannot tell someone buying a supplement

The studies are useful, but they do not add up to a simple promise. Several were very small. The people studied differed in age, activity and health. The preparations differed. The amounts and study lengths differed. Some interventions included a change in physical activity, while a newer cognitive formulation included other active ingredients.

Just as importantly, not every outcome improved. Walking and cognition were unchanged in one seven-day trial. The 24-week cognition trial was also neutral across its primary and secondary outcomes.

None of these older-adult studies tested the finished Kiwi Superfoods Blackcurrant Skin Extract formula. That is why we do not treat a result from a specific research extract, a blackcurrant-derived anthocyanin supplement, or a multi-ingredient drink as proof of what our capsules will do.

Why we like blackcurrant after 50 without calling it an anti-ageing pill

We like blackcurrant because it starts with something familiar: a New Zealand-grown berry. We use NZ-grown blackcurrant skin extract, the deeply coloured part of the berry that makes blackcurrant especially interesting when you are looking at anthocyanin-rich plant compounds.

Our current daily dose provides a minimum of 270 mg of NZ-grown blackcurrant skin extract plus 400 mg of vitamin C. The bottle contains 60 capsules, and the current directions are two capsules daily, with or without food. Our product is gluten free and vegan-friendly.

That gives you a simple capsule format without asking you to build a complicated supplement stack. We also like that blackcurrant now has a growing human research story across exercise, vascular and cognitive questions, even though the findings are not uniform.

If you want to understand more about what gives the berry its deep colour and why New Zealand-grown blackcurrants attract so much research interest, read our guide to New Zealand blackcurrant anthocyanins.

Where our Blackcurrant Skin Extract fits

We see our Blackcurrant Skin Extract as a straightforward NZ-grown berry supplement for adults who want a simple addition to everyday wellbeing. It is not an anti-ageing pill, a longevity product, a memory treatment or a blood-pressure treatment.

The best fit is much more down to earth: a convenient capsule built around NZ-grown blackcurrant skin extract, used alongside the basics that continue to matter after 50. Good food, regular movement, enough sleep and appropriate health care stay central.

If you are comparing different blackcurrant options, you can also browse our blackcurrant collection and choose the format that makes the most sense for you.

A quick safety note after 50

Taking more medicines is common as we get older, so supplement safety deserves a quick check. If you take warfarin or another blood-thinning medicine, have a bleeding disorder, use phenothiazines, or have surgery coming up, speak with a qualified health professional before using blackcurrant supplements.

If you are pregnant or breastfeeding, professional guidance is also appropriate. And supplements should not be used to replace prescribed treatment or to manage symptoms that need proper assessment.

For the fuller list of cautions, see our blackcurrant supplement safety guide.

Common questions

Are blackcurrant supplements worth considering after 50?

They can be worth considering if you want a simple food-derived supplement and the product fits your health situation. Human research in older adults is still limited and mixed, so we see blackcurrant as an interesting addition to everyday wellbeing rather than a proven anti-ageing or treatment product.

What blackcurrant studies have actually been done in older adults?

Older-adult studies have included small seven-day trials looking at blood pressure, arterial function, walking and cognition, a three-month study in previously sedentary older women that also increased physical activity, a 24-week cognition trial in adults aged 60 to 85, and a four-week study of a multi-ingredient blackcurrant formulation in healthy adults aged 55 and over.

Does blackcurrant help people stay active as they age?

A 2024 study reported improvements in walking distance and sit-to-stand performance in previously sedentary older women, but the blackcurrant group was also required to increase habitual physical activity. That means the study cannot show that blackcurrant alone caused the changes.

What have studies found about blackcurrant and circulation in older adults?

Two small 2020 trials reported changes in selected blood-pressure or arterial-function measures after seven days of specific New Zealand blackcurrant preparations. These findings are interesting, but they do not show that blackcurrant treats high blood pressure or cardiovascular disease.

Does blackcurrant improve memory in older adults?

The evidence is mixed. A 2026 24-week trial found no treatment-by-time effect on its primary or secondary outcomes, while a separate four-week study reported encouraging changes in selected attention measures. The four-week product also contained L-theanine and pine bark extract, so those findings cannot be credited to blackcurrant alone.

Do all older adults respond the same way?

No. Age, health, activity level, diet, medicines and the exact supplement can all differ. Research groups also vary widely, which is why a result in one small study should not be treated as a promise for every person over 50.

Were Kiwi Superfoods Blackcurrant Skin Extract capsules used in these studies?

No. The older-adult trials used their own study preparations and protocols. Our finished Blackcurrant Skin Extract should not be treated as identical to those research products or assumed to produce the same outcomes.

Can people over 50 take blackcurrant supplements with medicines?

Some people need extra care. If you take warfarin or another blood-thinning medicine, have a bleeding disorder, use phenothiazines, or have surgery coming up, speak with a qualified health professional before using blackcurrant supplements. Professional guidance is also appropriate during pregnancy or breastfeeding.

How should Kiwi Superfoods Blackcurrant Skin Extract be taken?

Our current directions are two capsules daily, with or without food. Follow the current label directions, and ask a qualified health professional if you are unsure whether the supplement suits your medicines or health situation.

References

1. 2020 older-adult blood-pressure, cognition and functional-performance trial. PubMed PMID 31902311.
2. 2020 arterial-function trial in older adults. PubMed PMID 32396017.
3. 2024 study of blackcurrant supplementation, physical activity and functional measures in previously sedentary older women. PubMed PMID 38317475.
4. 2026 24-week cognition trial in adults aged 60 to 85. PubMed PMID 41879044.
5. 2026 four-week trial of a multi-ingredient blackcurrant formulation in healthy older adults. Frontiers in Pharmacology, 30 September 2026.

If blackcurrant fits what you are looking for, we have kept the next step simple: NZ-grown blackcurrant skin extract, vitamin C, two capsules a day, and clear directions on the label.