All food additives are not harmful.
A "food additive" is any substance added during the production, processing, or storage of food. A manufactured product or a product derived from nature, it can be salt used to preserve or sugar used to sweeten. Additives can be vitamins or minerals used to enrich, a fat replacement used to enhance texture, or a color or dye to enhance appearance.
Example: Ascorbic acid, enhance our health. This additive, used to provide color in meat and nutrition in beverages, is nothing more than vitamin C, which helps in tissue formation and collagen formation and helps in metabolism of various minerals. Alpha-tocopherol, used to prevent oils from going rancid, is vitamin E, which may reduce the risk of cancer and heart disease, as it acts as anti-oxidant.
2. No. Presence of microorganisms are not always evidence that it can't be taken by human.
Live bacterias are used for various food production.
a. Fermented milk products: Lactobacillus, Lactococcus, Bifidobacterium
b. variety of foods including Indian dosa, rabri: fermentation by Leuconostoc mesenteroides, S. faecalis
c. Probiotics: are live food supplements used in yoghurt and other fermented milk products. It includes Lactobacillus acidophillus and Bifidobacterium bifidum. A minimum of 108 bacteria per 1 ml must get to the colon alive to have any significant effect. These bacteria improve the microbial spectrum in the gut and thus contribute to the following effects:
- Influence immunity and hence prevent or make diarrheal diseases milder
- Decrease the risk of colon cancer
- Decrease cholesterol absorption
- Produce acids that decrease the pH in the gut and thus increase the absorption of minerals such as calcium and phosphorous.