The present invention relates to a novel alkaloid and novel bioactive alkaloid fractions derivable from Ribes preferably selected among Ribes Rubrum and Ribes nigrum; methods of manufacturing such bioactive Ribes alkaloid fractions and their use for the inhibition of IKK-, PDE4 and/or PDE5 and in addition their promoting effect on mitochondrial biogenesis and function; their therapeutic or non-therapeutic applications as nutritive or medicinal products in the management of conditions associated with impaired mitochondrial function or IKK-, PDE4 and/or PDE5 activity, such as inflammation, neurodegeneration, dyslipidemia, type 2 diabetes mellitus, impaired wound healing, sarcopenia and other conditions associated with muscle dysfunction or tiredness and fatigue, or where optimization of muscular or cognitive function is desired; extracts, juices or concentrates of Ribes comprising such alkaloids; compostions comprising such alkaloids, including pharmaceutical compositions, nutritive product such as functional foods and nutraceutical compositions, and cosmetic compositions and medical devices.
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