ActiveCells Chlorella is grown exclusively in Germany inside closed glass-tube photobioreactors — a cultivation method the brand highlights as fundamentally different from the industry norm of open outdoor ponds or aluminum tank fermenters. This closed-system approach uses natural sunlight for photosynthesis (unlike dark tank fermentation, which requires added glucose and produces no vitamin B12) and shields the algae from external contaminants such as heavy metals, pesticide residue, and airborne pollutants that open ponds are exposed to.

The farm draws from its own underground artesian water source, and a gentle, low-temperature drying process is used to keep each Chlorella cell wall intact. According to the brand, an unbroken cell wall is actually the more effective form for binding and eliminating toxins, and digestibility comes from the species and drying method rather than from mechanically cracking the cell — so no ultrasonic wave processing is used.

Nutritionally, Chlorella is roughly 50% plant-based protein (including 20 amino acids), along with minerals (calcium, potassium, magnesium, zinc, iron), B-vitamins including bioavailable B12, vitamins C, E, and K1, polyunsaturated fatty acids, and antioxidant pigments such as chlorophyll, lutein, and carotenoids — making it a particularly useful supplement for vegans, vegetarians, and elderly individuals seeking bioavailable B12.