\n
\n
![\"EarthSnap\"\/](\"https:\/\/www.newsbeep.com\/ie\/wp-content\/uploads\/2025\/09\/earthsnap-banner-news.webp.webp\")
\n<\/a><\/p>\n
In leaf and flower samples from three commercial strains, the overlooked plant material carried signals that pointed to a more complicated chemical story.<\/p>\n
Magriet Muller at Stellenbosch University (SU<\/a>) documented compounds that had not previously been reported in cannabis.<\/p>\n The strongest surprise came from leaves. Rare flavoalkaloids live here, plant compounds that combine flavonoids and nitrogen-containing alkaloids. <\/p>\n Unexpectedly, these appeared mainly in one strain rather than across all three, to the surprise of the researchers.<\/p>\n That narrow pattern makes the discovery promising but constrained, posing a larger question of how much value may be hiding in cannabis waste.<\/p>\n Rare compounds come to the surface<\/p>\n Across the three strains, the team tentatively identified 79 compounds, including 16 flavoalkaloids in four related classes.<\/p>\n Several newly recorded chemicals belonged to flavonoids, common plant compounds tied to color and defense.<\/p>\n However, flavoalkaloids stood out because nature rarely generates them, making them uncommon.<\/p>\n \u201cMost plants contain highly complex mixtures of phenolic compounds, and while flavonoids occur widely in the plant kingdom, the flavoalkaloids are very rare in nature,\u201d Muller said.<\/p>\n Those rare molecules clustered mainly in the leaves of one strain, which made the finding harder to dismiss as background noise.<\/p>\n Looking beyond the flower<\/p>\n Leaf material gets less attention than cannabis flowers, yet the rarest signals came from leaves of one strain rather than across all samples.<\/p>\n Plant chemistry often changes by tissue. This is because leaves, flowers, roots, and stems face different threats and build different defenses. <\/p>\n For growers and scientists, that means the lower-value pile may not be chemically simple. Muller used two-dimensional liquid chromatography in the study.<\/p>\n This a sorting method that separates mixed chemicals twice \u2013 to pull apart compounds that would otherwise overlap.<\/p>\n The team paired that sorting with high-resolution mass spectrometry, which weighs fragments so precisely that formulas can be estimated.<\/p>\n Strong separation let the team pull rare flavoalkaloids away from the much more abundant flavonoids. <\/p>\n That approach matters because stronger common signals can hide rare ones, and create more unknowns.<\/p>\n Strains are not all created equal<\/p>\n One commercial strain carried the strongest leaf signal for flavoalkaloids, while the other two looked much more alike.<\/p>\n That uneven pattern matches a familiar problem in cannabis science. Plants can share a label style yet differ sharply inside their cells.<\/p>\n Selective breeding, hybrid ancestry, and growing conditions can all change the chemical mix by turning plant genes up or down.<\/p>\n Small sample size keeps the finding narrow, but the gap among just three strains makes the variation hard to ignore.<\/p>\n Promising, but still untested<\/p>\n Medical promise does not mean medical proof, and this study did not test the newly detected compounds in people, animals, or cells.<\/p>\n Chemical fingerprints are not drug effects, so no one knows whether these leaf<\/a> compounds fight inflammation, slow cancer, or help patients.<\/p>\n Still, the chemistry gives researchers targets to isolate and test before anyone treats rare signals as medical leads.<\/p>\n Beyond famous cannabinoids<\/p>\n Cannabis research often centers on cannabinoids \u2013 chemicals that interact with the body\u2019s signaling system. <\/p>\n They can alter mood, pain, appetite, or inflammation. Yet cannabis also makes other molecules that can shape smell, color, defense, and possible biological effects.<\/p>\n Earlier work on cannflavins<\/a>, cannabis flavonoids that can affect inflammation pathways in lab models, showed how non-cannabinoid chemistry can carry medical interest.<\/p>\n The leaf discovery adds a rarer class to that wider picture without claiming that every compound will become useful.<\/p>\n Waste may carry value<\/p>\n Leaves are often treated as lower-priority material after harvest. The discovery of rare compounds changes the economic question from simple disposal to careful screening.<\/p>\n \u201cOur analysis again highlights the medicinal potential of Cannabis plant material, currently regarded as waste,\u201d said Professor Andr\u00e9 de Villiers at SU.<\/p>\n If future work confirms useful activity, growers could sort leaves by strain, chemistry, and purpose instead of treating them as stream of leftovers.<\/p>\n Quality controls would still matter, because a compound found in one strain cannot be assumed to appear in all cannabis<\/a> plants.<\/p>\n Study limitations and future research <\/p>\n Every major claim in the paper carries one important qualifier, the flavoalkaloids were tentatively identified.<\/p>\n That means the instruments matched likely formulas and patterns from broken-apart molecules, but scientists still need purified samples to confirm exact structures.<\/p>\n Some alkaloid groups \u2013 nitrogen-containing parts that can change biological behavior \u2013 could not be assigned from the available data.<\/p>\n Clear limits make the result more useful, not less, because they show exactly where the next experiments must begin.<\/p>\n The discovery reframes cannabis leaves as being worth testing, containing rare flavoalkaloids, strong strain differences, and overlooked phenolics.<\/p>\n Future work can map more strains, verify the structures, and test biological effects. But the current message is clear, waste material can still hold scientific value.<\/p>\n The study is published in the Journal of Chromatography A<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"Scientists have identified rare plant chemicals in cannabis leaves for the first time, exposing hidden chemistry in a…\n","protected":false},"author":2,"featured_media":442029,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[61,60,82],"class_list":["post-442028","post","type-post","status-publish","format-standard","has-post-thumbnail","category-science","tag-ie","tag-ireland","tag-science"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/442028","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=442028"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/442028\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/442029"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=442028"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=442028"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=442028"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}