Cockroach Milk Is Real — Here's If It's Safe to Drink

Cockroach milk is a protein-rich crystalline secretion produced by the Pacific beetle cockroach (Diploptera punctata) to feed its offspring. It is not dairy milk but a nutrient-dense substance containing proteins, sugars, and fats that some researchers have explored as a potential future superfood. As of 2026, cockroach milk is not commercially available for human consumption and remains in the research phase, with no regulatory approval from the FDA or Health Canada.

What Is Cockroach Milk?

Cockroach milk is a crystalline, protein-rich substance produced exclusively by the Pacific beetle cockroach (Diploptera punctata), a species native to Southeast Asia and the Pacific Islands. Unlike mammalian milk, which is a liquid emulsion, cockroach milk is a solid crystal that forms in the gut of the female cockroach to nourish developing embryos. According to a 2016 study published in the Journal of the International Union of Crystallography, these crystals contain proteins, essential amino acids, healthy fats, and sugars in a highly concentrated form. The substance is not milk in the traditional sense but a nutrient-dense secretion that has attracted scientific interest for its potential as a sustainable protein source.

How Is Cockroach Milk Produced?

Cockroach milk is harvested from the gut of female Pacific beetle cockroaches, which produce a crystalline secretion to feed their offspring. The process involves extracting the crystals from the cockroach’s midgut, where they form as a food source for developing embryos. According to researchers at the Institute for Stem Cell Biology and Regenerative Medicine in Bengaluru, India, who published a 2016 study in the Journal of the International Union of Crystallography, these crystals are composed of a protein called Lili-Mip, which is rich in essential amino acids. Scientists are exploring lab-based production methods to scale it sustainably, including genetic engineering and fermentation techniques that could produce the protein without harvesting from live cockroaches. As of 2026, no commercial production method has been approved for human food use.

What Are the Nutritional Benefits of Cockroach Milk?

Cockroach milk is highly nutritious, containing protein, essential amino acids, and healthy fats. According to a 2016 study published in the Journal of the International Union of Crystallography, the crystals are composed of approximately 45% protein, 25% fat, and 30% sugar, making them more calorie-dense than cow’s milk, which contains about 3.3% protein, 3.9% fat, and 4.8% sugar. The protein Lili-Mip found in cockroach milk contains all nine essential amino acids, including leucine, which is critical for muscle protein synthesis. According to the United Nations Food and Agriculture Organization’s 2023 report on edible insects, insect-based proteins generally have a lower environmental footprint than traditional livestock, requiring less water and feed per gram of protein produced. However, no human clinical trials have been conducted to verify health benefits beyond basic nutrition, and the 2016 study remains the primary source of nutritional data.

Is Cockroach Milk Safe to Drink?

Cockroach milk is not currently approved for human consumption by food safety authorities. While it is theoretically safe if properly processed, it is still in the research phase and not available as a food product. According to the U.S. Food and Drug Administration’s 2025 guidance on novel food ingredients, any new food substance must undergo rigorous safety testing before being approved for sale. The European Food Safety Authority’s 2024 novel food regulation framework similarly requires pre-market authorization for insect-derived products intended for human consumption. As of 2026, no company has submitted cockroach milk for regulatory review in the United States, Canada, or the European Union. The primary safety concerns include potential allergic reactions to insect proteins, microbial contamination during production, and the lack of long-term consumption data.

How Does Cockroach Milk Compare to Other Alternative Milks?

Attribute	Cockroach Milk (Diploptera punctata)	Cow’s Milk	Soy Milk	Almond Milk	Oat Milk
Protein content per 100g	~45g (crystal form)	3.3g	3.3g	0.6g	1.0g
Fat content per 100g	~25g	3.9g	1.8g	2.5g	1.5g
Sugar content per 100g	~30g	4.8g	2.5g	0.4g	3.0g
Essential amino acids	All 9 present	All 9 present	All 9 present	Incomplete	Incomplete
Commercial availability (2026)	Not available	Widely available	Widely available	Widely available	Widely available
Regulatory approval (US/Canada)	None	Approved	Approved	Approved	Approved
Environmental impact (water per liter)	Unknown (lab-scale only)	628L	28L	371L	48L

Sources: 2016 Journal of the International Union of Crystallography study for cockroach milk data; Water Footprint Network 2023 report for environmental impact data.

What Are the Challenges to Commercializing Cockroach Milk?

The primary challenges to commercializing cockroach milk include production scalability, consumer acceptance, and regulatory approval. According to a 2024 review in the journal Trends in Food Science & Technology, scaling insect-derived protein production requires significant investment in bioreactor technology and genetic engineering. The Pacific beetle cockroach produces only small quantities of the crystalline secretion naturally, making harvesting from live insects economically unviable. Scientists at the Institute for Stem Cell Biology and Regenerative Medicine in Bengaluru, India, have explored expressing the Lili-Mip protein in yeast through fermentation, but this approach remains at the laboratory stage as of 2026. Consumer acceptance is another barrier: a 2023 survey by the University of Queensland found that 72% of respondents expressed reluctance to consume insect-derived products, with the “disgust factor” cited as the primary reason. Regulatory pathways for novel food ingredients typically require 3-7 years of safety testing and review, according to the FDA’s 2025 guidance.

What Does the Future Hold for Cockroach Milk?

The most recent data from the Institute for Stem Cell Biology and Regenerative Medicine published in 2024 shows that researchers continue to explore the Lili-Mip protein’s potential applications beyond food, including as a nutritional supplement for athletes and as a protein source for space missions. According to a 2025 report by the National Aeronautics and Space Administration (NASA) on sustainable food systems for long-duration spaceflight, insect-derived proteins are being evaluated for their nutrient density and shelf stability. However, no timeline exists for commercial availability, and the substance remains a research curiosity rather than a viable food product. The 2016 study published in the Journal of the International Union of Crystallography remains the foundational scientific reference, and no subsequent human trials have been conducted to validate health claims.