EOS Health Resources

Medical & Telehealth Glossary

Plain-language definitions of the medications, ingredients, hormones, peptides, conditions, and telehealth terms you may encounter at EOS Health and across modern telehealth care. Educational reference only.

Acne

Condition or Symptom

A common skin condition in which hair follicles become clogged with oil and dead skin cells, leading to pimples, blackheads, whiteheads, or deeper cysts, most often on the face, chest, and back.

Acne vulgaris
skin
/skin

Active Pharmaceutical Ingredient (API)

Industry Term

The biologically active component of a medication that produces its intended effect, as distinct from inactive ingredients such as fillers, solvents, or preservatives.

API

Androgenetic Alopecia

Condition or Symptom

A hereditary, hormone-related form of hair loss that causes gradual thinning of the scalp hair, commonly referred to as male-pattern or female-pattern baldness.

Male-pattern or female-pattern hair loss
mens
/mens-health

Asynchronous Care

Industry Term

A telehealth model in which a patient submits health information through an online intake form and a licensed clinician reviews it and responds later, without a live real-time appointment.

Store-and-forward telehealth

Biest

Active Ingredient

A compounded topical preparation that combines two estrogens, estriol and estradiol, typically in a 50:50 or 80:20 ratio, used in menopausal hormone therapy.

Bi-estrogen (estriol + estradiol)
biest-topical-lotion
womens
/medications/biest-topical-lotion

Bioidentical Hormones

Hormone

Hormones that are chemically identical in molecular structure to those naturally produced by the human body, such as estradiol, progesterone, and testosterone. They may be commercially manufactured or compounded.

Body-identical hormones
womens
/womens-health

BPC-157

Peptide

A synthetic peptide derived from a protein found in gastric juice and studied in research settings. It is not approved by the FDA and is available only through compounding in limited circumstances.

Body Protection Compound-157
longevity
/longevity

Bremelanotide

Active Ingredient

A melanocortin-receptor agonist given by subcutaneous injection and used to address low sexual desire. It is also referred to by the identifier PT-141.

PT-141
mens
/mens-health

Cialis

Medication

A brand name for the medication tadalafil, a PDE5 inhibitor used for erectile dysfunction. Cialis is a registered trademark of its respective manufacturer.

Brand name for tadalafil
mens
/mens-health

CJC-1295

Peptide

A synthetic analog of growth-hormone-releasing hormone (GHRH) studied for its effect on growth hormone secretion, frequently paired with ipamorelin. It is not FDA-approved and is available only through compounding.

Often combined with ipamorelin
longevity
/longevity

Compounded Medication

Industry Term

A medication prepared by a licensed pharmacy for an individual patient by combining, mixing, or altering ingredients. Compounded drugs are not reviewed by the FDA for safety, effectiveness, or manufacturing quality.

Compounding Pharmacy

Industry Term

A pharmacy licensed to prepare customized medications for individual patients from a prescription, including 503A pharmacies and 503B outsourcing facilities.

503A / 503B facilities

Dihydrotestosterone (DHT)

Hormone

A potent androgen hormone derived from testosterone by the enzyme 5-alpha-reductase. It plays a role in androgenetic hair loss and prostate growth.

DHT
mens
/mens-health

Erectile Dysfunction

Condition or Symptom

A condition in which a person is unable to get or keep an erection firm enough for satisfactory sexual activity.

ED, impotence
mens
/mens-health

Estradiol

Hormone

The primary and most potent form of estrogen produced by the ovaries. It is available in forms such as patches, gels, tablets, and vaginal preparations for use in hormone therapy.

17-beta-estradiol
womens
/womens-health

Estriol

Hormone

A milder form of estrogen often used in compounded topical hormone preparations such as Biest.

womens
/womens-health

Estrogen

Hormone

A group of sex hormones, including estradiol, estriol, and estrone, that regulate the reproductive system and influence bone, skin, and other tissues.

womens
/womens-health

Finasteride

Active Ingredient

An oral or topical medication classified as a 5-alpha-reductase inhibitor, used for androgenetic hair loss by lowering levels of dihydrotestosterone (DHT).

5-alpha-reductase inhibitor
mens
/mens-health

Generic Drug

Industry Term

A medication that contains the same active ingredient as a brand-name drug and is sold under its chemical name rather than a trademarked brand name.

GHK-Cu

Peptide

A naturally occurring copper-binding peptide (copper tripeptide-1) used in topical skin preparations.

Copper tripeptide-1
ghk-cu-cream
skin
/medications/ghk-cu-cream

GLP-1 Receptor Agonist

Industry Term

A class of medications that mimic the glucagon-like peptide-1 hormone, which is involved in blood-sugar regulation and appetite. Semaglutide and tirzepatide belong to this general class.

GLP-1, incretin mimetic
weight-loss
/weight-loss

Glutathione

Active Ingredient

A naturally occurring antioxidant made of three amino acids (cysteine, glutamate, and glycine). It is used in injectable and nasal-spray preparations as part of longevity and skin protocols.

GSH
glutathione
longevity
/medications/glutathione

Glycine

Active Ingredient

A simple amino acid sometimes added to compounded injectable medications as a stabilizing or bulking agent.

weight-loss
/weight-loss

Growth Hormone Secretagogue

Industry Term

A compound that signals the body to produce and release its own growth hormone. Peptides such as sermorelin, CJC-1295, and ipamorelin fall into this category.

longevity
/longevity

Hair Loss

Condition or Symptom

The partial or complete loss of hair from the scalp or body. It can be hereditary, hormonal, or triggered by stress, nutrition, or medical conditions.

Alopecia, thinning hair
mens
/mens-health

HIPAA

Industry Term

A U.S. federal law that sets national standards for protecting sensitive patient health information from being disclosed without the patient's consent or knowledge.

Health Insurance Portability and Accountability Act

Hormonal Balance Therapy

Industry Term

Treatment that uses hormones to restore levels that have declined or become imbalanced, prescribed and monitored by a licensed clinician. Also described as hormone therapy.

Hormone Replacement Therapy

Industry Term

The use of hormones such as estradiol, progesterone, or testosterone to supplement levels that decline with age or menopause. It is prescribed and monitored by a licensed clinician.

Menopausal hormone therapy
womens
/womens-health

Hot Flashes

Condition or Symptom

Sudden feelings of warmth, often most intense over the face, neck, and chest, that are a common symptom of perimenopause and menopause.

Vasomotor symptoms
womens
/womens-health

Hyperpigmentation

Condition or Symptom

Darkening of areas of skin caused by excess melanin, which can result from sun exposure, inflammation, or hormonal changes.

skin
/skin

Hypoactive Sexual Desire Disorder

Condition or Symptom

Persistently low sexual desire that causes personal distress and is not explained by another medical or psychiatric condition.

HSDD
womens
/womens-health

Hypogonadism

Condition or Symptom

A condition in which the body produces little or no sex hormones, such as low testosterone in men, which may affect energy, mood, and libido.

Low testosterone, Low T
mens
/mens-health

Insulin Resistance

Condition or Symptom

A condition in which the body's cells respond less effectively to insulin, leading to higher blood-sugar levels and often associated with weight gain and metabolic conditions.

weight-loss
/weight-loss

Ipamorelin

Peptide

A synthetic peptide studied as a growth-hormone secretagogue, often paired with CJC-1295. It is not FDA-approved and is available only through compounding.

longevity
/longevity

Longevity Medicine

Industry Term

A field focused on supporting healthy aging and long-term wellness through preventive care, lifestyle, and clinician-guided protocols.

Healthy-aging medicine
longevity
/longevity

Low Libido

Condition or Symptom

A decrease in sexual desire that can be influenced by hormones, stress, relationships, medications, or underlying health conditions.

Reduced sex drive
mens
/mens-health

Melasma

Condition or Symptom

A form of hyperpigmentation that produces brown or gray-brown patches, usually on the face, and is often associated with hormonal changes and sun exposure.

skin
/skin

Menopause

Condition or Symptom

The point at which menstrual periods have stopped for 12 consecutive months, marking the end of reproductive years and a decline in estrogen and progesterone.

womens
/womens-health

Metabolic Health

Industry Term

A measure of how well the body processes and regulates energy, including blood sugar, cholesterol, blood pressure, and weight.

weight-loss
/weight-loss

Methylcobalamin (Vitamin B12)

Active Ingredient

An active form of vitamin B12, a nutrient involved in energy metabolism and nerve function, sometimes added to injectable compounds.

Vitamin B12
weight-loss
/weight-loss

MIC (Methionine, Inositol, Choline)

Active Ingredient

A combination of the compounds methionine, inositol, and choline, sometimes given with vitamin B12 as part of metabolic support protocols.

Lipotropic injection
mic-b12
weight-loss
/medications/mic-b12

Minoxidil

Active Ingredient

A medication available in oral and topical forms used for hair loss. It is a vasodilator that acts on the hair follicle.

mens
/mens-health

NAD+

Active Ingredient

A coenzyme found in every living cell that is involved in energy production and cellular metabolism. It is used in injectable and nasal-spray forms as part of longevity protocols.

Nicotinamide adenine dinucleotide
nad-injection
longevity
/medications/nad-injection

Off-Label Use

Industry Term

The practice of a licensed clinician prescribing an approved medication for a purpose, dose, or population other than the one described in its official labeling, based on clinical judgment.

Ozempic

Medication

A brand name for the injectable medication semaglutide, a GLP-1 receptor agonist indicated for type 2 diabetes. Ozempic is a registered trademark of its respective manufacturer.

Brand name for semaglutide
weight-loss
/weight-loss

PDE5 Inhibitor

Industry Term

A class of medications, including sildenafil and tadalafil, that relax blood vessels and are used for erectile dysfunction.

mens
/mens-health

Peptide

Peptide

A short chain of amino acids, the building blocks of proteins. In medicine, peptides are used as hormones, signaling molecules, and active ingredients in certain therapies.

longevity
/longevity

Peptide Therapy

Industry Term

The use of peptide-based compounds under clinician supervision. Some peptides are FDA-approved medications, while others are research compounds available only through compounding in specific circumstances.

longevity
/longevity

Perimenopause

Condition or Symptom

The transitional years leading up to menopause, when hormone levels fluctuate and symptoms such as irregular periods, hot flashes, and mood changes may begin.

Menopause transition
womens
/womens-health

Prescription (Rx)

Industry Term

An order for a medication written by a licensed clinician. Prescription medications require this authorization before a pharmacy can dispense them.

Rx

Progesterone

Hormone

A hormone produced mainly by the ovaries that helps regulate the menstrual cycle and is used in hormone therapy, often alongside estrogen.

progesterone-capsules
womens
/medications/progesterone-capsules

PT-141

Peptide

An identifier for the peptide bremelanotide, a melanocortin-receptor agonist administered by injection and used to address low sexual desire.

Bremelanotide
mens
/mens-health

Retinoic Acid

Active Ingredient

A vitamin A derivative (also called tretinoin) used in topical skin preparations for acne and signs of skin aging.

Tretinoin
skin
/skin

Semaglutide

Active Ingredient

A GLP-1 receptor agonist that influences blood-sugar regulation and appetite. It is available as a branded injectable medication and, in some circumstances, as a compounded preparation.

GLP-1 receptor agonist
compounded-semaglutide
weight-loss
/medications/compounded-semaglutide

Sermorelin

Peptide

A synthetic analog of growth-hormone-releasing hormone studied for its effect on the body's own growth hormone production. It is prepared through compounding.

sermorelin
longevity
/medications/sermorelin

Sildenafil

Active Ingredient

A PDE5 inhibitor taken by mouth and used for erectile dysfunction by increasing blood flow.

Generic form of Viagra
sildenafil
mens
/medications/sildenafil

Subcutaneous Injection

Industry Term

An injection given into the fatty tissue just beneath the skin, a common route of administration for many self-administered medications.

SubQ, SC

Sublingual

Industry Term

A route of administration in which a medication is placed under the tongue to dissolve and be absorbed.

Tadalafil

Active Ingredient

A long-acting PDE5 inhibitor taken by mouth and used for erectile dysfunction by increasing blood flow.

Generic form of Cialis
tadalafil
mens
/medications/tadalafil

Telehealth

Industry Term

The delivery of health care, education, and consultation remotely using technology such as secure messaging, video visits, and online intake forms.

Telemedicine

Industry Term

A subset of telehealth focused specifically on remote clinical services, such as diagnosing conditions and prescribing treatment through virtual visits.

Tesamorelin

Peptide

A growth-hormone-releasing hormone analog that stimulates the body's production of growth hormone. It is administered by subcutaneous injection.

longevity
/longevity

Testosterone

Hormone

The primary male sex hormone, also present in smaller amounts in women, that influences muscle mass, bone density, mood, energy, and libido.

mens
/mens-health

Testosterone Therapy

Industry Term

Treatment that supplements testosterone in people with clinically low levels, prescribed and monitored by a licensed clinician as part of hormonal balance care.

Testosterone optimization
mens
/mens-health

Thymosin Alpha-1

Peptide

A peptide that occurs naturally in the thymus gland and is studied for its role in immune signaling. It is available only through compounding in specific circumstances.

longevity
/longevity

Tirzepatide

Active Ingredient

A dual GIP and GLP-1 receptor agonist that influences blood-sugar regulation and appetite. It is available as a branded injectable medication and, in some circumstances, as a compounded preparation.

GIP/GLP-1 receptor agonist
compounded-tirzepatide
weight-loss
/medications/compounded-tirzepatide

Titration

Industry Term

The gradual adjustment of a medication dose, usually increasing over time, to reach the amount that is appropriate for an individual under clinician guidance.

Topical Medication

Industry Term

A medication applied directly to the skin or another body surface, such as a cream, gel, lotion, or solution.

Cream, gel, lotion, solution

Tretinoin

Active Ingredient

A topical vitamin A derivative (retinoic acid) used in skin preparations for acne and signs of aging.

Retinoic acid
skin
/skin

Vaginal Atrophy

Condition or Symptom

Thinning, drying, and inflammation of the vaginal walls that can occur when estrogen levels decline, often around menopause.

Genitourinary syndrome of menopause (GSM)
womens
/womens-health

Viagra

Medication

A brand name for the medication sildenafil, a PDE5 inhibitor used for erectile dysfunction. Viagra is a registered trademark of its respective manufacturer.

Brand name for sildenafil
mens
/mens-health

Wegovy

Medication

A brand name for the injectable medication semaglutide, a GLP-1 receptor agonist indicated for chronic weight management. Wegovy is a registered trademark of its respective manufacturer.

Brand name for semaglutide
weight-loss
/weight-loss

Zepbound

Medication

A brand name for the injectable medication tirzepatide, a GIP/GLP-1 receptor agonist indicated for chronic weight management. Zepbound is a registered trademark of its respective manufacturer.

Brand name for tirzepatide
weight-loss
/weight-loss

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Educational information only. This glossary is provided for general informational purposes and is not medical advice, a diagnosis, or a treatment recommendation. It does not describe the safety or effectiveness of any specific EOS Health product. Compounded medications are not reviewed by the FDA for safety, effectiveness, or manufacturing quality. Always talk with a licensed healthcare provider about your individual health needs. Brand names are the trademarks of their respective owners and are used for identification only.