Why Cannabis Leaf is Crucial for True Full Spectrum CBDa Oil
Why Cannabis Leaf is Crucial for True Full Spectrum CBDa Oil
Insights from research by Peter Vermeul – founder of CBD Spain
When we talk about Full Spectrum CBDa oil , most people automatically think of the cannabis plant's flower buds. This makes sense, as that's where the highest cannabinoid concentrations are found. But anyone who truly understands how the plant works knows: the key to a complete and effective extract lies in the leaves .
Cannabis leaves are often still viewed as waste material in the industry. According to Peter Vermeul , founder and owner of CBD Spain, this is a fundamental misconception. His research demonstrates that the leaves themselves contain a rich, complex, and largely underestimated phytochemical profile—with direct implications for the effectiveness of Full Spectrum CBDa oil.
The leaf: metabolic heart of the cannabis plant
Leaves are the plant's metabolic workhorse. Substances are produced here that protect cannabis from UV radiation, insects, mold, and oxidative stress. Think of:
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Cannabinoid acids such as CBDa, THCa and CBGa
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Terpenes (including β-caryophyllene and humulene)
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Flavonoids , including the unique cannflavins
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Sterols and other lipids
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Recently discovered flavoalkaloids
These substances are not a “by-catch”, but demonstrably contribute to the biological activity, anti-inflammatory effect and the entourage effect of an extract.
Fewer cannabinoids, more complexity
Although leaves contain fewer cannabinoids than flowers (about 1–2% versus 5–28%), they actually contain more flavonoids and unique micro-components . For example, the powerful cannflavins—up to 30 times more anti-inflammatory than aspirin—are found almost exclusively in the leaves.
Leaves also contain relatively more sesquiterpenes , such as β-caryophyllene, a special substance that functions as a CB2 receptor agonist and thus has an anti-inflammatory effect without being psychoactive.
Why True Full Spectrum Extraction Is So Hard
The problem?
Anyone who wants to extract the full spectrum from leaves faces serious technical challenges:
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Chlorophyll readily comes along during extraction and makes the extract bitter and unstable
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Removing chlorophyll often leads to a loss of cannabinoids and flavonoids
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Terpenes are volatile and disappear upon heating or evaporation
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Winterization and filtration remove not only wax, but also valuable sterols and acids
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Solvent polarization forces choices: either broad or clean — rarely both
Many commercial “Full Spectrum” oils actually turn out to be chemically incomplete .
The illusion of Full Spectrum in the market
According to Peter Vermeul, this problem arises because conventional extraction methods initially produce an extract that is too "green" and impure, which is then corrected through decolorization, filtration, and refining. The final product looks better, but is poorer in terms of content.
On the other hand, there are crude extracts that are chemically more broad, but practically inconvenient, unstable, and difficult to dose. The industry often presents this as an unavoidable choice.
But it isn't.
One extraction process, complete plant profile
In his research, Peter Vermeul describes how his patented extraction method breaks through this contradiction. By precisely adjusting temperature, polarity, and process:
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chlorophyll is not present in large quantities
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cannabinoid acids remain intact in their natural form
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terpenes, flavonoids and sterols are retained
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polar and non-polar substances are extracted simultaneously
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the natural balance of the plant is maintained
The result is an extract that is chemically complete, stable and practically applicable — without loss-making correction steps afterwards.
New discoveries: flavoalkaloids in cannabis leaves
In 2025, cannabis leaves were first shown to contain flavonoids : rare compounds that combine the characteristics of flavonoids and alkaloids. This discovery further underscores that the leaf possesses its own, largely unexplored chemical universe.
For the future of Full Spectrum CBDa oil, this means only one thing:
Anyone who ignores the magazine misses an essential part of its therapeutic potential.
Why this is relevant to your health
At CBD & Herb, we consciously work with Full Spectrum CBDa oil from CBD Spain , developed by Peter Vermeul. Not because it sounds good, but because the extraction process is demonstrably focused on preserving the complete plant profile —including the components often missing from standard oils.
Do you really want to understand why some CBD oils work deeper and broader than others , and what Full Spectrum really means in scientific terms?
👉 Read our blog and the full, in-depth research article by Peter Vermeul here.