Soaking, Sprouting & Germination: Understanding the Nutritional Transformation of Seeds
Soaking and sprouting introduce an additional dimension to whole-food feeding by initiating the natural biological processes through which seeds begin developing into plants. During germination, enzymes become active, stored nutrients undergo changes, and the concentrations of certain vitamins, amino acids, phytochemicals and antinutritional compound content is altered. The peer-reviewed publications presented here investigate these transformations in grains, pseudocereals, legumes and seeds, including buckwheat, quinoa, rice, sesame and sunflower. Together, they demonstrate that germination can substantially change a food’s nutritional characteristics and that the results depend on the plant species, preparation method and germination conditions. For companion-bird owners, this research provides a scientific foundation for understanding why appropriately selected and safely prepared sprouts can contribute additional variety to a whole-food feeding program. However, sprouting does not make every seed or legume safe to consume raw, nor does it guarantee nutritional completeness. These studies encourage a thoughtful approach to incorporating suitable soaked and sprouted ingredients into a diverse, nutritionally balanced, species-appropriate diet.
1. Benincasa et al. (2019): Nutritional changes during grain germination
Benincasa, P., Falcinelli, B., Lutts, S., Stagnari, F., & Galieni, A. (2019). Sprouted grains: A comprehensive review. Nutrients, 11(2), 421.
What this means for the animals we feed: Germination activates a seed’s metabolism and can change its nutrients and beneficial plant compounds. Sprouting suitable grains offers another form of whole-food variety, with the resulting nutritional profile depending on the grain and sprouting conditions.
2. Gan et al. (2017): Bioactive compounds in edible sprouts
Gan, R.-Y., Lui, W.-Y., Wu, K., Chan, C.-L., Dai, S.-H., Sui, Z.-Q., & Corke, H. (2017). Bioactive compounds and bioactivities of germinated edible seeds and sprouts: An updated review. Trends in Food Science & Technology, 59, 1–14.
What this means for the animals we feed: Germination can increase or alter naturally occurring compounds such as polyphenols, vitamins, and gamma-aminobutyric acid (GABA). Properly grown sprouts can contribute plant compounds that differ from those in the same seeds before germination.
3. Pająk et al. (2014): Phenolic compounds in seeds and sprouts
Pająk, P., Socha, R., Gałkowska, D., Rożnowski, J., & Fortuna, T. (2014). Phenolic profile and antioxidant activity in selected seeds and sprouts. Food Chemistry, 143, 300–306.
What this means for the animals we feed: Germination increased measured phenolic compounds and antioxidant activity in the mung bean, radish, broccoli, and sunflower samples studied. Suitable sprouts can therefore offer a different range and concentration of plant compounds from their unsprouted seeds.
4. López-Amorós et al. (2006): Germination changes legumes differently
López-Amorós, M. L., Hernández, T., & Estrella, I. (2006). Effect of germination on legume phenolic compounds and their antioxidant activity. Journal of Food Composition and Analysis, 19(4), 277–283.
What this means for the animals we feed: Germination changed the types and amounts of phenolic compounds in peas, beans, and lentils. Antioxidant activity increased in items like the peas and beans studied, showing why sprouting should be understood as a food-specific transformation rather than a universal nutritional improvement.
5. Zhang et al. (2015): Germination changes buckwheat’s nutritional profile
Zhang, G., et al. (2015). Effects of germination on the nutritional properties, phenolic profiles, and antioxidant activities of buckwheat. Journal of Food Science, 80(5), H1111–H1119.
What this means for the animals we feed: Over 72 hours of germination, the buckwheat studied showed increases in measured phenolic compounds and flavonoids, alongside decreases in phytic acid and trypsin-inhibitor activity. Sprouted buckwheat can therefore differ substantially from dry buckwheat in both its plant compounds and its composition.
6. Wu et al. (2022): Sprouting conditions affect brown rice
Wu, N.-N., Li, R., Li, Z.-J., & Tan, B. (2022). Effect of germination in the form of paddy rice and brown rice on their phytic acid, GABA, γ-oryzanol, phenolics, flavonoids and antioxidant capacity. Food Research International, 159, 111603.
What this means for the animals we feed: Rice germinated with its husk intact developed a different profile of plant compounds than rice germinated after husk removal. The study shows that the starting form of a grain and the germination method influence the composition of the resulting sprout.
7. Zhou et al. (2015): Vitamin C and flavonoids in germinated Tartary buckwheat
Zhou, X., Hao, T., Zhou, Y., Tang, W., Xiao, Y., Meng, X., & Fang, X. (2015). Relationships between antioxidant compounds and antioxidant activities of Tartary buckwheat during germination. Journal of Food Science and Technology, 52(4), 2458–2463.
What this means for the animals we feed: During the germination period studied, Tartary buckwheat accumulated vitamin C, flavonoids, and rutin, while measured vitamin E activity decreased. Sprouting can create a different balance of naturally occurring compounds rather than increasing every nutrient at once.
8. Ha et al. (2017): Sprouting white and black sesame seeds
Ha, T. J., Lee, M.-H., Seo, W. D., Baek, I.-Y., Kang, J. E., & Lee, J. H. (2017). Changes occurring in nutritional components (phytochemicals and free amino acid) of raw and sprouted seeds of white and black sesame (Sesamum indicum L.) and screening of their antioxidant activities. Food Science and Biotechnology, 26(1), 71–78.
What this means for the animals we feed: Sprouted sesame seeds contained more measured free amino acids and total phenolic compounds than the unsprouted seeds, although the amounts of some sesame lignans decreased. This illustrates how germination can change the balance of compounds in a familiar whole-food ingredient.
9. Germination and mineral-related compounds in quinoa
Maldonado-Alvarado, P., Pavón-Vargas, D. J., Abarca-Robles, J., Valencia-Chamorro, S., & Haros, C. M. (2023). Effect of germination on the nutritional properties, phytic acid content, and phytase activity of quinoa (Chenopodium quinoa Willd). Foods, 12(2), 389.
What this means for the animals we feed: In the white, red, and black quinoa varieties studied, germination increased phytase activity and reduced measured phytic acid. The findings show that sprouting can change compounds involved in mineral binding.
10. Short-term germination of sesame seeds
Chang, Y.-L., et al. (2024). Metabolomics analysis of germinated sesame (Sesamum indicum L.) seeds: Possibility of incorporating short-term germination treatments into the sesame production process. LWT, 213, 117036.
What this means for the animals we feed: Short-term germination changed numerous compounds in sesame seeds and increased measured phenolic content and antioxidant capacity without a substantial loss of oil after 20 hours. Sprouting can modify a sesame seed’s plant-compound profile while retaining much of its original fat content under the conditions studied.
11. Germination time affects the compounds in sesame seeds
Anwar, O., Iahtisham-Ul-Haq, Arif, R., Ahmed, W., & Suleria, H. A. R. (2026). Germination-induced variations in proximate composition, phytochemical profile and antioxidant activities of white sesame seeds: A green approach for nutritional modification. BioTech, 15(3), 60.
What this means for the animals we feed: The measured flavonoids, polyphenols, and antioxidant activity of sesame seeds changed differently as germination progressed. Longer sprouting was not consistently better, and the researchers observed mold at later stages, reinforcing the importance of shorter sprouting times and controlled conditions.
12. Germination alters buckwheat’s phenolic profile
Živković, A., Polak, T., Cigić, B., & Požrl, T. (2021). Germinated buckwheat: Effects of dehulling on phenolics profile and antioxidant activity of buckwheat seeds. Foods, 10(4), 740.What this means for the animals we feed: Germination increased several measured phenolic compounds in buckwheat, while removing the hull affected the resulting profile. The study demonstrates that both seed preparation and germination can influence the plant compounds present in a sprouted whole-food ingredient.