is this product trans.... must be trans for active form

Yes, this product is the trans form.

What's the percentage of trans-resveratrol?

The package does not give the % (or any other) breakout of the composition. On the package it just says Resveratrol and in "Other Ingredients" it just says - "None".

No. It is made in China and the seller has it tested for impurities and toxins,. I have been using BS powders for years. The only problem I had was with their R Alpha Lipoic Acid, which was a rubbery mess due to air getting to the powder at some point in handling. From that point on, I began to buy my R-ALA in capsule form. But I have used the trio of powders -- curcumin, resveratrol, and quercetin for several years and have had no problem. Ditto their berberine, L-glutamine, pine bark extract, beet root powder, and a few others without a hitch. The company has offered me freebies to try other powders but I buy what I want when it is convenient to me, so you can be assured that what I'm saying here is unbiased. When I try something new, it is not because it is free but because research shows that it might help me and the seller has an excellent reputation for product quality.

What is the % of trans-resveratrol and its purity % ?

The package says there is 245 mg in a 250 mg serving. 245 mg / 250 mg = 98% purity. That's fairly realistic for a well known supplement distributor. Just... doing the math.

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BULKSUPPLEMENTS.COM Resveratrol Powder - Resveratrol Supplement, Polygonum Cuspidatum, Resveratrol 1000mg - Antioxidants Supplement, Vegan & Gluten Free - 1000mg per Serving, 500g (1.1 lbs)

BULKSUPPLEMENTS.COM Resveratrol Powder - Resveratrol Supplement, Polygonum Cuspidatum, Resveratrol 1000mg - Antioxidants Supplement, Vegan & Gluten Free - 1000mg per Serving, 500g (1.1 lbs)

Product ID: 603226597

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Details

Brand
Flavour
Unflavored
Primary supplement type
Vitamin B2
Unit count
500 Grams
Item form
Powder
Item weight
500 Grams

🌿Vegan, gluten & allergen free

💊1000mg pure Resveratrol per serving

🧠Supports brain focus & cognitive health

Description

🔥 Elevate your wellness game with pure Resveratrol power!

CLEAN CONSCIOUS - Vegan, gluten-free, soy-free, dairy-free, and zero added sugars—perfect for health-conscious professionals with dietary restrictions.
BRAIN BOOST FORMULA - Enhance mental clarity, focus, and cognitive function with a supplement designed to support your brain’s peak performance.
ANTIOXIDANT POWERHOUSE - 1000mg of pure Resveratrol delivers a potent daily dose of natural antioxidants to fight oxidative stress and promote longevity.
JOINT VITALITY SUPPORT - Natural compounds help maintain joint health and keep you active, so you never miss a beat in your busy lifestyle.
PREMIUM QUALITY ASSURANCE - Manufactured under strict cGMP standards and third-party tested for purity and potency—because your health deserves the best.

BULKSUPPLEMENTS.COM Resveratrol Powder offers a high-potency 1000mg dose of pure Resveratrol per serving, sourced from Polygonum Cuspidatum. This vegan, gluten-free antioxidant supplement supports brain health, cognitive focus, and joint vitality. Manufactured under rigorous cGMP standards and third-party tested, it’s a clean, natural way for professionals to boost daily wellness and maintain an active, healthy lifestyle.