Cultivated Meat Media Amino Acid Analysis

What we measure in cultivated-meat media

Medium is the cost problem in cultivated meat, and at scale amino acids are a large part of it. Researchers have described the medium as the leading cost driver for cultivated meat because it contains many indispensable, expensive components ¹. Which component dominates depends on scale. At bench-scale prices, growth factors made up over 99% of the cost of Essential 8 medium in the Good Food Institute's analysis ². Once large-scale growth factor production was assumed, the basal medium became the dominant cost, at 97% of the total ². In Humbird's techno-economic model of a fed-batch process, amino acids contributed $19 of an estimated $37 per kg of wet cell mass, against $3 for growth factors ³. Swapping in a plant hydrolysate at $2 per kg of mixed amino acids brought the total to $22 per kg ³. Our note on amino acid cost drivers covers these analyses in more detail.

Cutting amino acid cost starts with knowing what cells consume. In spent-media analysis of chicken muscle precursor cells, chicken fibroblasts and mouse C2C12 myoblasts, glutamine was the amino acid used most, followed by arginine and serine ¹. Isoleucine, leucine and methionine were also drawn down, while many other media components did not appear to be depleted ¹. The authors concluded that no one medium is likely to be ideal and cost-effective across cell types ¹.

Analytes	Why they matter	Panel
Glutamine, glutamate, ammonia	Glutamine was the most-used amino acid ¹; ammonia inhibited bovine fibro-adipogenic progenitor proliferation above 5 mM and adipogenic differentiation above 2 mM ⁴	AA-1
Arginine, serine, isoleucine, leucine, methionine	Notably depleted in spent media ¹	AA-1
Other AA-1 amino acids	Little measured depletion; candidates for trimming, cell type by cell type ¹	AA-1
Tyrosine	A soybean hydrolysate could cover modeled essential amino acid needs except glutamine and part of the tyrosine requirement ³	AA-1
Ornithine, citrulline, taurine, GABA, hydroxyproline	In CHO work, ornithine and citrulline content of soy hydrolysate lots correlated with antibody titer ⁵	AA-2

Recycled media are a second use. In one study, alkaline stripping at pH 12 removed over 82% of ammonia from spent medium while preserving its glucose. Treated medium supported lamb satellite cell growth without morphological changes, and the authors proposed a 50:50 blend of treated spent and fresh medium ⁶. That study tracked glucose and ammonia. An amino acid profile of the treated medium adds what is left to reuse and what needs topping up.

Davis is also home to the UC Davis Cultivated Meat Consortium, whose research objectives include optimizing media and bioprocessing; its researchers received a $3.55 million National Science Foundation award in 2020 ⁷.

We measure free amino acids by AQC derivatization and reversed-phase HPLC with UV detection. Reports give µM and mg/L, a chromatogram and a QC summary. Turnaround is typically 5 business days. See amino acid analysis for panel details.

Questions this answers

"Which amino acids do our cells actually take up, and which could we cut?"
"Our spent medium goes back into the reactor after ammonia removal. What amino acids are left in it?"
"Does our food-grade basal medium match the reagent-grade version it replaced?"
"How much do two hydrolysate lots differ in free amino acids?"
"Do our bovine, porcine or fish cells use the same amino acids as published cell types?"

Caveats for this matrix

Glutamine degrades in the medium

In culture media at 37 °C, about 10% of glutamine decomposes per day to pyrrolidone carboxylic acid and ammonia ⁸. Some of the ammonia in a spent medium is therefore chemical, not metabolic. Hydrolysates may not fill the gap: in Humbird's analysis, a soybean hydrolysate could not meet the glutamine requirement ³. We report glutamine, glutamate and ammonia from the same sample so the three can be read together.

Hydrolysate media change during culture

Hydrolysates are mixtures of free amino acids and peptides ⁵. In one bovine satellite cell study using a soy and yeast hydrolysate basal medium, free amino acids were higher in spent medium than in fresh medium. The authors pointed to evaporation and to peptidase activity releasing amino acids from peptides ⁹. Batch-to-batch variation in their laboratory-made yeast autolysates was about 30–40% ⁹. In CHO work, soy hydrolysate lots from one manufacturer had opposite effects on antibody production ⁵. We measure free amino acids only; total amino acids after acid hydrolysis are not offered yet. See free vs total amino acids.

Serum, albumin and protein isolates

AQC reacts with primary and secondary amines and needs a 4–6-fold molar excess of reagent for complete derivatization ¹⁰. Albumin, serum and plant protein isolates also carry amine groups, so we remove protein before derivatization; see sample preparation. Where the matrix calls for a recovery check, we spike known amino acids. Hydrolysate and amino acid powders go through our solids preparation (PREP-1).

Analytes outside the panel

In CHO culture, glutamine dipeptides are taken up as the intact dipeptide ¹¹, and our panel does not count them as free glutamine. Cysteine and cystine are not in AA-1 or AA-2; we measure them on request with a separate workup. Lactate is not measured. The profile-reading guide explains what each result means.

Application notes

Application note · Cultivated meat

Amino Acids in Serum-Free Media for Cultivated Meat: The Cost Drivers

A review of techno-economic analyses on cultivated-meat media cost, the amino acid share, and the proposed routes to lower it.

Read the note →

Literature watch

New publications on cultivated meat analysis are reviewed monthly; relevant findings and what they change for sampling or interpretation are added to this page.

Key references

Spent media analysis suggests cultivated meat media will require species and cell type optimization — O'Neill EN, Ansel JC, Kwong GA, Plastino ME, Nelson J, Baar K, Block DE, npj Science of Food, 2022.
An analysis of culture medium costs and production volumes for cultivated meat — Specht L, The Good Food Institute, 2020.
Scale-up economics for cultured meat — Humbird D, Biotechnology and Bioengineering, 2021.
Non-ammoniagenic proliferation and differentiation media for cultivated adipose tissue — Hubalek S, Melke J, Pawlica P, Post MJ, Moutsatsou P, Frontiers in Bioengineering and Biotechnology, 2023.
Applications and analysis of hydrolysates in animal cell culture — Ho YY, Lu HK, Lim ZFS, Lim HW, Ho YS, Ng SK, Bioresources and Bioprocessing, 2021.
Development and optimization of an ammonia removal strategy for sustainable recycling of cell culture spent media in cultivated meat production — Pakbin B, Amanipour A, Amirvaresi A, Shahsavari A, Ovissipour R, Frontiers in Bioengineering and Biotechnology, 2025.
Research — UC Davis Cultivated Meat Consortium — University of California, Davis, n.d.
Spontaneous decomposition of glutamine in cell culture media — Tritsch GL, Moore GE, Experimental Cell Research, 1962.
Highly Sustainable Plant and Yeast Hydrolysate-Based Alternative for Basal Medium Supports Long-Term In Vitro Propagation of Bovine Satellite Cells — Schenzle L, Goyal S, Leber R, Pichler H, Fuchs A, Foods, 2026.
Derivatization of Amino Acids Using Waters AccQ•Tag Chemistry — Waters Corporation, educational primer, n.d.
Tracking dipeptides at work: uptake and intracellular fate in CHO culture — Sánchez-Kopper A, Becker M, Pfizenmaier J, et al., AMB Express, 2016.

OpenChemWorks Laboratory · Reviewed by the laboratory director, PhD chemist · Updated September 23, 2026

Amino Acid Analysis for Cultivated Meat Media