The body naturally produces three main forms of estrogen: estrone (E1), estradiol (E2), and estriol (E3). Estrone is converted from estradiol in the liver. Synthesized in the ovaries and metabolized in the liver, estradiol is the most physiologically active form of estrogen. When taken orally, estradiol is converted into estrone in the small intestine. Estriol is the shortest-acting estrogen and has a weaker effect than estradiol and estrone. Estriol remains intact when supplemented orally, i.e.

Natural hormones are, in fact, bioidentical hormones. The fact that the bioidentical hormones come from natural plants (soy or yam plants) does not make them bioidentical. From there they are taken to a chemical plant where they are further processed into the bioidentical forms. They are further tested for bioidentical purity, so that when a compounding pharmacy receives these products they are ready to be compounded into different dosage forms. See similar questions...

Natural fabrics: cotton, silk, Hatian cotton, etc. These fabrics must be color locked and cleaned with a solvent based cleaner by a trained professional or the colors will bleed, the upholstery will brown or yellow, etc. That is why natural fibers are more expensive to clean than synthetic. Synthetic fabrics: polyester, Herculean, denim, etc. These materials are more durable than natural fibers and can be cleaned with a water based cleaner in most cases. See similar questions...

During the years before actual menopause, estrogen may be decreasing only slightly and ovulation has ceased or is rare. Without ovulation, progesterone production is essentially zero making a woman estrogen dominant. Further supplementing the dominant estrogen simply does not make sense, and synthetic progestins have undesireable side effects. See similar questions...

MZ: True natural Essential Oil will help you recover or maintain your health. On the other hand, the ones manufactured from chemically reconstructed molecules, using petroleum products etc… smell very strong and last for a long time. I am talking about peach/apple/lilac/lily of the Valley/gardenia/ magnolia / honeysuckle are NOT NATURAL. Even lotus goes into that category as I have yet to see someone distilling some. They can destroy your sense of smell permanently. MZ: Absolutely. See similar questions...

All Ethanol Products can be made with naturally derived Ethanol (commonly referred to as "Grain" alcohol), or synthetically produced Ethanol. Natural alcohol is commonly referred to as Grain Alcohol because almost all commercial alcohol produced in North America is derived from grain (corn). Not all naturally derived Ethanol however, comes from grain (corn). Ethanol can be naturally produced (fermented) from any carbohydrate source. See similar questions...

These minerals can be produced naturally by geologic activities or can be synthetically produced in chemical reactions. While the iron oxide mineral in both Naturals and Synthetics is similar, Natural Iron Oxides contain contaminates which often reduce their tinting strength in comparison to their Synthetic counterparts. These contaminants are of two types: those with coloring properties and those that act as an extender. See similar questions...

Natural" progesterone (also termed USP Progesterone) refers to a single molecular structure that is "bio-identical" to the progesterone molecule that the body makes. Synthetic "progestins" or "progestogens," do not exactly duplicate the body's own progesterone molecule. They mimic the body's progesterone closely enough to bind to progesterone receptor sites and have some progesterone-like effects, but they do not deliver the full range of "messages" that a natural progesterone molecule would. See similar questions...

Detection of synthetic diamonds is no longer a concern for the jewelry industry. That was a key good-news message presented by Dr. James Shigley, director of research for the Gemological Institute of America, during GIA's GemFest Basel, part of the BaselWorld 2005 trade fair. See similar questions...

HTP stands for 5 Hydroxy Tryptophan and is the "immediate precursor" building block for Serotonin, a very important neurotransmitter in the brain. Serotonin helps to maintain emotional stability and aids in sleep. 5HTP is derived in the natural state by the grinding of seeds from the Griffonia plant. It is not a synthetic chemical. Serotonin syndrome” is most commonly caused by the combination of multiple antidepressant medications. See similar questions...

Latex International makes two kinds Talalay latex: Talatech, which is a blend of 30% natural and 70% synthetic, and Talalay Natural, which is 100% natural latex from the rubber tree. J See similar questions...

Natural Vitamin E (d-alpha-tocopherol) has about twice the biological activity than commonly used synthetic Vitamin E (dl-alpha-tocopherol). LifePak also provides mixed natural tocopherols (alpha, beta, gamma, and delta tocopherols), which further enhance the antioxidant protection provided by Vitamin E. See similar questions...

All motor oils are made up of base oils and additives. In general, fully synthetic motor oils contain non-conventional, high-performance fluids. Semi-synthetic oils (also called "blends") usually use a small percentage of non-conventional, high-performance fluids in combination with conventional base oil. See similar questions...

Scientists have been able to isolate individual chemical constituents from natural essential oils and to recreate them in the lab, producing less costly alternatives. Synthetic replicas of essential oils, called "nature identical," may capture the fragrance of an essential oil, but, because they do not replicate the complex structure of essential oils, they will never reproduce the synergistic effects or medicinal properties. See similar questions...

Natural hormones means that these hormones are chemically the same as the ones the human body produces. They are also called "bio-identical". Synthetic hormones refer to those manufactured with a chemical structure that is foreign to the human body but mimics some hormonal activity. An example of natural hormones would be Estriol, Progesterone, Testosterone, and DHEA. An example of synthetic hormones would be Premarin, Prempro, Climara, Estratest, Estratab, and all birth control pills. See similar questions...

Pharmaceutical progestins do not appear in the biosynthetic pathway. The fact is, they are not found in any living forms. Furthermore, being foreign to all living things, they are patentable and thereby potentially more profitable. Natural Progesterone is from a plant extraction and is not patentable See similar questions...

No. Synthetic vitamins are identical in chemical structure to those found in food. A difference between natural and synthetic vitamins has not been demonstrated for any vitamins, except vitamin E. The form of vitamin E derived from "natural" products is more biologically active than its synthetic form. However, both commercially available types usually contain identical amounts in biological activity. See similar questions...

Vita-Complete: Vitamins from food and synthetic have virtually the same action in the body that do not distinguishes the difference between vitamins from foods and supplement pills. However, the raw materials used in production of the supplements can come from various sources and substantially differ in the quality. Vita-Complete uses only the top of the line ingredients in the manufacturing process. See similar questions...