Tazo Passion Herbal Tea (20ct filterbags)

Tazo's standard filterbags are paper heat-sealed with polypropylene. Hernandez et al. 2019 (Environ. Sci. Technol., McGill) measured ~11.6 billion microplastic and ~3.1 billion nanoplastic particles released per cup from plastic-containing tea bags brewed at 95 °C. Banaei et al. 2024 (Chemosphere, UAB Barcelona) confirmed polypropylene bags shed ~1.2 billion particles per mL and demonstrated particle uptake by human intestinal cells in vitro. There is no established safe exposure threshold for chronic ingestion of polypropylene nanoplastics from food contact materials.

'Natural flavors' is a regulatory catch-all (FDA 21 CFR 101.22) that can include dozens of undisclosed compounds, processing aids, and solvents. Listed twice in this product (tropical and passionfruit), suggesting flavor compounds are doing the work where actual passionfruit content would be expected. No allergen or origin transparency.

Second 'natural flavor' line on the same ingredient list. Same concerns as above re: undisclosed components. The product is named 'Passion' but actual passionfruit material is not listed — the flavor is doing the work.

Industrial citric acid is mass-produced via Aspergillus niger fermentation on glucose substrates. Generally recognized as safe; used here as a tartness and preservative agent.

Glycyrrhizin in licorice has demonstrated soothing effects on mucosal tissue but in chronic high doses can raise blood pressure and lower potassium (pseudohyperaldosteronism). Trace amounts in a tea blend are low risk for healthy adults but a real concern for hypertensive or pregnant users.

Rose hips are one of the densest plant sources of vitamin C and contain galactolipids with documented anti-inflammatory activity (Winther et al. 2005, osteoarthritis trial).

Source of d-limonene, hesperidin, and naringin — flavonoids with antioxidant and anti-inflammatory activity. Adds aromatic citrus oils.

Cinnamon contributes cinnamaldehyde with mild antimicrobial and blood-sugar-modulating effects. Tea-blend quantities are negligible from a coumarin (cassia variety) safety standpoint.

Lemongrass (Cymbopogon citratus) contributes citral and geraniol with mild antimicrobial and digestive-soothing effects. Long history of culinary use; no significant safety concerns at infusion doses.

Hibiscus (Hibiscus sabdariffa) is rich in anthocyanins and polyphenols; randomized trials (Hopkins et al. 2013; McKay et al. 2010) show modest blood-pressure-lowering effects of 5-7 mmHg systolic. Caffeine-free and a strong vitamin C source.