“Lab grown” means a product was created in a controlled laboratory or factory setting rather than sourced from nature through traditional means. The term applies across several industries, from diamonds and meat to human tissue for medicine. In every case, the core idea is the same: scientists replicate a natural process under artificial conditions to produce something physically or chemically similar to the original.
How the Term Applies Across Industries
You’ll most commonly encounter “lab grown” in three contexts: diamonds, meat, and medical tissue. Each uses a different technology, but they share a basic pattern. A small natural starting material (a seed crystal, a group of animal cells, or stem cells) is placed in a carefully controlled environment and given the raw ingredients it needs to grow. The result is a product that closely mirrors what nature produces, sometimes identically.
The terminology can vary. Lab-grown meat is also called cultivated meat, cultured meat, or cell-cultured meat. Lab-grown diamonds are sometimes marketed as synthetic diamonds or man-made diamonds. In medicine, the language shifts to tissue engineering or regenerative medicine. These are all describing the same fundamental concept: growing something in a lab instead of extracting it from the earth or raising it on a farm.
Lab-Grown Diamonds
Lab-grown diamonds are real diamonds. They have the same crystal structure, hardness, and optical properties as diamonds pulled from the ground. The difference is entirely in how they form. Natural diamonds crystallize over billions of years deep in the earth under extreme heat and pressure. Lab-grown diamonds compress that timeline into weeks.
There are two main methods. The older technique, called high-pressure, high-temperature (HPHT), places a tiny diamond seed inside a press that heats a carbon source to 1,300–1,600°C at pressures above 870,000 pounds per square inch. A molten metal flux dissolves the carbon, which then migrates to the seed and crystallizes into a diamond. The newer method, chemical vapor deposition (CVD), works at lower temperatures and pressures. A diamond seed sits inside a vacuum chamber filled with a carbon-containing gas like methane. A microwave beam breaks the gas molecules apart, and carbon atoms rain down onto the seed, building up a diamond layer by layer over several weeks.
The Gemological Institute of America (GIA), the organization that invented the famous 4Cs grading system for natural diamonds, now grades lab-grown diamonds separately. Rather than using the traditional color, clarity, and cut nomenclature, GIA classifies lab-grown stones as either “Premium” or “Standard” based on an overall quality assessment. The reasoning: most lab-grown diamonds cluster in a narrow range of high quality, making the detailed grading scale less meaningful for a manufactured product.
Lab-Grown Meat
Lab-grown meat, more precisely called cultivated meat, is real animal tissue produced without raising or slaughtering animals. The process starts by taking stem cells from a living animal and banking them. Those cells are placed into large vessels called bioreactors, similar to what a brewery uses for fermentation, and fed a nutrient-rich liquid containing amino acids, glucose, fats, vitamins, minerals, and growth-stimulating proteins.
For simpler products like ground meat, the cells can be harvested after they multiply to sufficient density. For structured cuts like steak, the cells also need a scaffold, a kind of edible framework that gives them physical support and signals to mature into muscle, fat, and connective tissue. The entire process takes roughly two to eight weeks depending on the product.
One technical challenge has been the growth medium itself. Early cell-culture work relied on fetal bovine serum, a nutrient-rich liquid derived from cow fetuses, which undermined the ethical appeal of the technology. Researchers worldwide are developing animal-free alternatives using ingredients like human platelet lysate and plant-derived proteins, though no single replacement works for every cell type yet.
In June 2023, two companies, UPSIDE Foods and GOOD Meat, received the first U.S. approvals from the USDA to sell cell-cultivated chicken. That marked a turning point, making the United States one of the first countries where consumers could legally buy lab-grown meat.
Nutrition and Environmental Impact
Cultivated meat’s nutritional profile is still a work in progress. Because the product is built from real animal cells, it contains animal protein with a similar amino acid makeup. However, researchers note that matching the full complexity of conventional meat, including its fat composition, certain essential fatty acids, and micronutrient levels, requires significant additional research. Some compounds found in traditional meat, particularly certain fatty acids that depend on the digestive processes of ruminant animals like cows, are difficult to replicate in a bioreactor.
The environmental case is more straightforward. Modeling studies estimate that cultivated meat could generate 78–96% fewer greenhouse gas emissions, use 99% less land, and require 82–96% less water compared to conventional livestock farming. These are projections based on scaled-up production, not current small-batch manufacturing, but they explain much of the interest in the technology.
Lab-Grown Tissue in Medicine
In medicine, “lab grown” typically refers to tissues or even partial organs engineered from a patient’s own stem cells. The goal is to create replacement parts the body won’t reject. Researchers have used stem cells to grow heart muscle cells for studying heart disease and testing drug safety. Whole human heart scaffolds have been repopulated with stem-cell-derived heart cells, and similar work has been done with lung tissue.
Cartilage repair is one of the more advanced applications. For people with ear deformities or cartilage damage, scientists culture cartilage-producing cells on synthetic polymer scaffolds. These cells multiply and secrete a gel-rich tissue that, once implanted, matures into functional cartilage within about eight weeks. This approach avoids some of the complications associated with traditional implants and prosthetics.
Most lab-grown organ work remains in the research stage. Full, transplantable organs like kidneys or livers are still far beyond current capabilities. But lab-grown tissues are already being used in drug testing and disease modeling, reducing the need for animal experiments and producing results more relevant to human biology.
What “Lab Grown” Does Not Mean
Lab grown is not the same as artificial or imitation. A cubic zirconia looks like a diamond but has a completely different chemical composition. A lab-grown diamond is chemically identical to a mined one. Similarly, plant-based burgers are designed to taste like meat but contain no animal cells. Cultivated meat is actual animal tissue, just produced differently. The distinction matters because “lab grown” specifically refers to replicating a natural material or biological process, not mimicking it with substitutes.
It also doesn’t mean unregulated. Lab-grown diamonds are graded by gemological authorities. Cultivated meat in the U.S. falls under joint oversight by the FDA and USDA. Lab-grown medical tissues go through clinical trial processes. Each industry has its own regulatory framework, though the rules are still evolving as the technologies scale up.