Resveratrol has become one of the most talked-about supplements for anyone serious about healthy ageing. Known for its antioxidant properties and its role in activating longevity genes like sirtuins, resveratrol has attracted attention from researchers and wellness enthusiasts alike. Naturally found in red grapes, berries, and Japanese knotweed, this polyphenol is now widely used in supplements for its potential to support cardiovascular health, slow cellular ageing, and even improve cognitive performance.

But as resveratrol’s popularity rises, so does the number of brands entering the market—many with bold claims but unclear ingredient sourcing or purity. Navigating the resveratrol supplement space in New Zealand can be surprisingly tricky; with so many options available, how do you know which one to trust? Some contain synthetic extracts, others rely on outdated sources like Japanese knotweed, and very few publish transparency around testing or fermentation methods.

That’s why we created this definitive guide.

In this article, we’ve reviewed the top 10 best resveratrol supplements available in New Zealand for 2025 , based on purity, source transparency, customer reviews, and bioavailability. Whether you’re new to resveratrol or looking to upgrade to a premium option, this list will help you make an informed decision. We’ve also included a buyer’s guide, a quick comparison table, and answers to the most frequently asked questions—so you can shop smarter and healthier.

For Youth’s The Grape takes the top spot on our list for its premium fermentation method, high purity, and plant-based formulation—ideal for those who want results without compromises.

Why it’s #1:

The Grape by For Youth is the gold standard for resveratrol supplements in New Zealand. Unlike most brands, it uses a fermented form of trans-resveratrol by Veri-te™ derived from natural yeast fermentation—not synthetic or knotweed-based sources. The result? A purer, more bioavailable product that mimics how resveratrol appears in nature.

Highlights:

• 98%+ 300 mg trans-resveratrol purity, confirmed by third party testing labs

• Naturally fermented (not synthetic)

• Sourced from Veri-te™ fermentation—not Japanese knotweed

• Vegan, non-GMO, third-party tested

• Made for optimal absorption and daily use
  
  

Why choose it:
Backed by science, clean-label, and zero compromises. If you want the best—this is it.

Why it made the list:

One of the more popular options, Doctor’s Best offers 200 mg of resveratrol in the form of ResVinol™, a blend that includes red wine and Japanese knotweed extracts.

Highlights:

• 200 mg trans-resveratrol per capsule

• Mixed polyphenol blend

• Affordable price point

• Available widely in NZ
  
  

Heads-up:
Any third party tests aren’t clearly disclosed.

Why it made the list:

A local NZ brand that provides standard resveratrol at a competitive price. The “double strength” formula offers 225 mg of Resveratrol per capsule.

Highlights:

• High dose: 225 mg per capsule

• Made from Japanese Knotweed extract

• NZ-based manufacturer
  
  

Note:
The capsule contained 450 mg of 50% Japanese Knotweed extract but only 225 mg of Resveratrol. The other ingredients are undisclosed.

Why it made the list:

A well-known global supplement brand, Solgar is trusted for consistent quality. Their resveratrol includes natural polyphenols from red wine extract.

Highlights:

• 250 mg resveratrol

• Resveratrol sourced from Japanese Knotweed extract

• Vegetarian capsules
  
  

Considerations:
Still relies on knotweed extract—not ideal for purity-focused users.

Why it made the list:

Designed in New Zealand and marketed as a longevity formula, Res-V includes a proprietary blend of antioxidants and 100 mg of resveratrol.

Highlights:

• Includes resveratrol, grape seed extract, and red wine polyphenols

• NZ-owned company

• Broader anti-ageing blend

Watch for:
Exact purity and resveratrol source not disclosed, with multiple ingredients blended in one capsule.

Why it made the list:
A budget-friendly and widely respected brand with standardized resveratrol content.

Highlights:

• 200 mg resveratrol from Japanese knotweed extract

• Vegetarian capsules

• Affordable
  
  

Note:
Knotweed-derived and lacks third party lab testing.

Why it made the list:
Premium formulation featuring additional longevity nutrients such as quercetin and grape seed extract.

Highlights:

• 222 mg trans-resveratrol

• Includes quercetin

• Advanced antioxidant synergy
  
  

Note:
Resveratrol from a blend of Japanese knotweed extract; slightly higher price.

Why it made the list:
Popular in Australian and NZ pharmacies, this blend includes red wine extract and antioxidants.

Highlights:

• Contains Japanese knotweed and grape seed extract

• Commonly stocked in retail chains

• Budget-friendly
  
  

Downside:
Low transparency around ingredient sourcing and testing.

Why it made the list:
Trusted wellness brand offering an easy daily dose for antioxidant support.

Highlights:

• Blended with Japanese knotweed, grape seed and red wine extract

• Affordable and accessible

• Suitable for general wellness use
  
  

Limitation:
Resveratrol dose is relatively low at 75 mg.

Why it made the list:
Targeted for professional healthcare use, this option offers hypoallergenic, high-quality ingredients.

Highlights:

• High purity resveratrol from Japanese knotweed extract

• Designed for sensitive individuals

• Trusted in integrative clinics
  
  

Note:
More expensive and niche than mainstream products.

Trustworthy brands will disclose lab testing for purity, heavy metals, and contaminants.

After evaluating purity, sourcing, transparency, and formulation, the winner is clear:

🥇 For Youth – The Grape

It stands above the rest thanks to its clean-label formulation, naturally fermented resveratrol, and ultra-high purity. It’s the only supplement on this list that avoids knotweed and synthetic shortcuts—making it ideal for anyone serious about long-term health and performance.

Is resveratrol safe for long-term use?
Yes—when taken in moderate doses from reputable brands, resveratrol is considered safe for long-term use. Always consult a healthcare provider if unsure.

Can I buy resveratrol supplements over the counter in New Zealand?
Absolutely. All supplements listed in this article are available online or through NZ-based retailers.

How much resveratrol should I take daily?
Typical doses range from 100 mg to 500 mg daily. If you're using a high-purity product like The Grape, 300 mg is often ideal for maintenance and longevity.