A Perspective on Super-Critical Extraction and Herbal Extracts

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Super-critical extraction and Herbal extracts: A perspective

The world is turning towards ‘alternative’, ‘complimentary’, ‘holistic’ and ‘integrative’ medical systems. The increasing interest in personal care particularly Europe and North America has seen many ‘Herbal Products’ on the rise. Changing trends have seen people turn to products from natural origin rather than synthetic origin. Products from natural origin are seen to be a part of a healthy lifestyle. These herbal products have phytochemical extracts as a major component. These extracts though being used for centuries and assumed safe, have to be standardized and tested according to modern science. This is necessary as now these extracts are used by a wider population for prevention against diseases and not for acute symptomatic management. Modern medicinal practices dictate that these herbal extracts be standardized and their safety validated as per norms.
However preparing standardized extracts is not an easy task. These extracts have a sequence of many small but significant steps which need to be taken into consideration. Traditional practices focused on understanding the growth conditions, the harvesting cycle and the details of extracting the herb. This often led to low yields. However, when it comes to manufacturing on an industrial scale to meet the market demand, the set of procedures (GMP) should be strictly defined and followed, also newer methods of extraction should be adopted for better yield. Standardization of preparation of these herbal extracts will assure the consumer of their quality.
Global scenario
The global market for these herbal extracts is estimated at over 60 billion USD. The current Indian share in these exports is estimated to be aroun...

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...d processing. The by-products from these food processing units can be done to extract antioxidants. SCE is used to extract β-carotene and lycopene from the by-products of the tomato industry. Optimization of the SCE process can yield up to 50% yields of lycopene and β-carotene from tomato by-products. On similar lines, tocopherols can be extracted from olives, phenolic compounds from grape seeds. This will open newer avenues for extraction of essential herbal extracts at an economical cost by the food processing units and better sustainability.

In conclusion, the herbal extracts manufacture and supply is going to be a growing sector in the coming years. The industry is looking towards extraction processes which are environmentally safe, simple and have a high yield. Super-critical extraction has risen to the occasion and is going to lead the way in the future.

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