
Grown in Taitung, the new Black Crystal Roselle variety rises above international competition thanks to its rich anthocyanin content.
Wel-Bloom Biotech leads the way by securing cultivar licensing, partnering with local farms, and developing a premium extract—offering a trusted, high-potency anthocyanin solution.

Officially Licensed by the TTDARES
The Black Crystal Roselle is a new variety developed over 9 years by the TTDARES.
Compared to the commonly available No. 3 roselle variety, it offers:
✔ Firmer calyces with a richer, deep purple color
✔ 7.7x higher anthocyanin levels in fresh harvest
✔ Higher yield per unit area
Wel-Bloom Biotech is the first in Taiwan to secure licensing and pioneer its commercial cultivation.



Contract Farming with Smallholders in Taitung
Wel-Bloom Biotech partners with the TTDARES and local smallholder farmers to create a balanced ecosystem—land, people, and farming in harmony.
Bringing New Life to Old Land

Patented Technology & Efficacy Platform
With advanced extraction technology, Wel-Bloom Biotech transforms Black Crystal Roselle into Wel-ROS6®, carefully preserving key actives like anthocyanins, polyphenols, and flavonoids—and even uncovering rare plant exosomes.
This award-winning extract is patented across Taiwan, Japan, and China, and validated through efficacy platforms.
It’s now being used in cutting-edge formulas for inner beauty, radiance, and body composition support.

Oil Red O Test Results

Curious about the powerful effects of Wel-ROS6® extract?
Explore the impressive results and start formulating your ideal health supplement!