Because they have more sophisticated properties, including chemical resistance, water resistance, and resistance to extreme temperatures, special resins cost more than standard resins
The most common food vehicles for mandatory folic acid fortification are wheat flour, maize flour, and rice 328,331,333,637,653,680,689,711,712,713,714,715,716,717,718,719,720,721,722,723,724

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For most people, a temporary purge or detox period lasts between one and three weeks