What Do Microplastics Look Like?

⚕️ MEDICAL DISCLAIMER: This article is for informational and educational purposes only and is not intended as medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider before making any changes to your health regimen, diet, or supplement use, especially if you have existing medical conditions or take medications. The information presented here should not be used to diagnose, treat, cure, or prevent any disease.

Microplastics are like ugly snowflakes – each particle is essentially unique. Their appearance varies widely based on the type of plastic, source material, degradation pathway, and environmental exposure history. Understanding what microplastics look like requires examining their morphology, color, and surface features at microscopic scales.

There are an Endless Number of Microplastic Shapes

Under the microscope, microplastics are small, look extremely diverse, and are commonly classified into several categories based on shape, including fibers, fragments, films, foams, pellets, and spheres [1,2]. These morphotypes reflect whether the particles originated as primary microplastics intentionally manufactured at small sizes or secondary microplastics formed through fragmentation of larger plastic items. 

Fibers are elongated, thread-like structures and represent the most frequently detected microplastic form in both environmental and human samples [3,4]. They largely come from synthetic textiles, like polyester clothing and bedding, and have been observed in all kinds of foods, including infant formula and dietary fiber supplements, with lengths ranging from approximately 120 micrometers to several millimeters [2,5].

Fragments and films appear as irregular, angular shards or thin, sheet-like pieces resulting from mechanical and chemical degradation of larger plastic objects such as bottles, bags, and utensils [2,3]. In human thrombi, microplastics have been reported as block-shaped particles, indicating that fragmentation can produce compact, non-fibrous geometries capable of entering biological systems [2].

Primary Microplastics Look Like Standard Shapes

Primary microplastics, including those used as abrasives and in personal care products, tend to look more similar and uniform. These particles commonly appear as smooth, spherical beads or pellets, and are often what’re used in studies involving microplastics [6]. Their regular geometry is an outcome of deliberate manufacturing, not environmental processes. 

High-resolution imaging techniques such as scanning electron microscopy have further revealed that polyethylene microplastics may adopt polyhedral or granular forms with surface protrusions [1,7]. These complex geometries demonstrate that even primary particles can exhibit structural variability at smaller scales.

Microplastics Are Found In Many Colors

Microplastics can be any color, which significantly complicates visual identification under the microscope. Documented colors in human tissues and fluids include transparent, white, gray, beige, brown, black, blue, red, green, yellow, magenta, and likely many more [2,8,9].

The Surface of Microplastics Are Shaped By The Environment

The surface topography of microplastics provides insight into the degradation because of the environment. Pristine particles, such as newly manufactured polystyrene beads, typically exhibit smooth and regular surfaces [6,9]. In contrast, environmentally aged microplastics show roughened textures with cracks, pits, fractures, and irregular edges formed through ultraviolet exposure, oxidation, and mechanical abrasion.

In environmental contexts, microplastics rarely remain chemically or biologically inert. They frequently become colonized by microorganisms, forming biofilms that adhere to their surfaces [10]. These biological coatings also alter the visual appearance of microplastics and influence how they interact with surrounding ecosystems and biological tissues.

There isn’t a Standard Microplastic Size, Shape, or Color 

Outside of a batch of manufactured primary microplastics, all microplastics are different. They range from smooth, spherical beads to jagged fragments, thin films, and elongated fibers with diverse colors and surface textures. This visual diversity reflects the complex life cycle of plastic materials and highlights why microscopic imaging must be paired with chemical identification methods to accurately characterize microplastic contamination [1,2].

The Benefits of the Deplasto Platform

The Deplasto platform, consisting of a scientifically-backed nutritional supplement, an iOS app for tracking daily microplastic intake, and a portfolio of lifestyle recommendations intended to help you minimize microplastics. 

Our nutritional supplement is formulated to support your body’s natural detoxification pathways, including oxidative stress management, cellular repair, and antioxidant support. Our microplastic intake app enables you to estimate and track your daily microplastic intake, with each datapoint backed by scientific studies. Our lifestyle recommendations, found in our blogs and in our eBook, have a plethora of actions and advice designed to help you make small changes to minimize microplastics. Overall, we believe that the best way to eliminate microplastics begins with you and the small changes you make to your daily life. Over time, collectively, we can make a significant difference.

Sources

1. A review of methods for mitigating microplastic contamination in biosolids from wastewater treatment plants before agricultural soil application
2. Isolation and identification of microplastics in infant formulas – A potential health risk for children
3. Detection of microplastics in human tissues and organs – A scoping review
4. Microplastics and human health – unveiling the gut microbiome disruption and chronic disease risks
5. Fibrous foes – First report on insidious microplastic contamination in dietary fiber supplements
6. Evaluation of size-dependent uptake, transport and cytotoxicity of polystyrene microplastic in a blood-brain barrier (BBB) model
7. Long-term exposure of human U87 glioblastoma cells to polyethylene microplastics – Investigating the potential cancer progression
8. A systematic review of microplastics emissions in kitchens – Understanding the links with diseases in daily life
9. Detection of Microplastics in Human Breast Milk and Its Association with Changes in Human Milk Bacterial Microbiota
10. Isolation and Identification of Four Strains of Bacteria with Potential to Biodegrade Polyethylene and Polypropylene from Mangrove