"Almost every antibiotic causes a disruption of normal bowel flora and a reduction in production of important vitamins, leading to diarrhea and other gastrointestinal side effects."

I have a personal experience where my life was saved through antibiotics, but I certainly experienced these side effects. Fortunately there are quality bowel flora supplements which help provide body with normal levels of intestinal bacteria. This is critical in metabolization of many vitamins, such as Vitamin B family.

Here's what Drug-Induced Nutrient Depletion Handbook has to say about Estrogen Replacement Therapy.

"Taking Estrogen Replacement Therapy can cause a depletion of important B vitamins, leadingto anxiety, depression, cardiovascular disease, and depression."

Again perhaps you should choose a high-quality multivitamin supplement and also provide nutrients that support normal endocrine function.

The Drug-Induced Nutrient Depletion Handbook provides a drug index, which alphabetically lists drugs by both brand and generic name, with cross-references and scientific basis, studies and abstracts for research which determined which nutrients are depleted by particular drug. It also lists nutrient information with concise descriptions of effects of depletion. What medications are you taking that are depriving your body of essential nutrients?

What happens when cells of your body are missing parts?

You eat to provide your cells with nourishment. It's not just about calories. That nourishment is collection of parts every cell in your body needs to function properly. You provide your cells with parts and those parts are assembled according to instructions in your DNA to create a variety of finished products. That could include new cells, of which there are many kinds, anti bodies to fight disease, neurotransmitters to carry signals between nerves, and hormones to regulate your body.

So again, there are beneficial raw materials in foods, which our bodies use, and need, to carry out vital cellular functions.

These functions keep us alive.

These functions combat disease.

These functions allow us to heal.

These functions allow our cells to build new cells and all of other finished materials that are necessary for normal life and optimal health.

And these raw materials are called nutrients.

We eat to give our body access to nutrients.

Sadly, our food does not contain nutrients it once had in abundance, so it is necessary to supplement a good diet with quality nutritional supplementation to ensure that our cells do not suffer from a parts deficiency. We should still strive to have a good diet, from as many whole foods as possible, with supplementation being a means to supplement, not substitute, benefits of a good diet.