Can you believe we consume approximately 5 grams or microplastics per week (about the weight of a credit card)?! In an attempt to minimize microplastic exposure, I’ve replaced my Sonicare brush heads with these biodegradable toothbrush replacement heads, made of 100% bamboo body and plant-based bristles (composed of 62% castor oil and 38% nylon), with only 6% plastic content in the entire product. This is a huge difference compared to the 100% Plastic construction of our standard brush head replacements.