Evidence-Based Supplement & Herb Guides

Parathyroid Function Explained: PTH, Calcium, and Vitamin D

Learn how parathyroid hormone, calcium, and vitamin D work together, what high or low PTH can mean, how to read common labs, and when abnormal results need medical evaluation.

Most people have heard of the thyroid, but the parathyroid glands are the quieter regulators that often matter just as much. These four tiny...

PCOS and Acne: Hormones, Skincare, and Medication Options

Understand PCOS acne from the inside out, including hormone drivers, skincare routines, medication options like spironolactone and birth control, and when persistent breakouts need specialist care.

PCOS acne can be especially frustrating because it often behaves differently from the short-lived breakouts many people expect. Instead of a few surface pimples...

PCOS and Fertility: Ovulation, Testing, and Treatment Options

Learn how PCOS affects fertility, why ovulation is often the main issue, which tests matter most, and how treatment usually moves from letrozole and metabolic support to advanced fertility options when needed.

For many people, the most frightening part of a PCOS diagnosis is not acne, irregular periods, or lab results. It is the quiet question...

PCOS and Sleep Apnea: Snoring, Fatigue, and Why It Gets Missed

Learn how PCOS and sleep apnea overlap, why snoring and fatigue are often missed, which symptoms matter most, and how proper testing and treatment can improve energy, blood pressure, and metabolic health.

Many people think of polycystic ovary syndrome as a condition defined by irregular periods, acne, hair growth, weight changes, or fertility problems. Sleep apnea...

PCOS Hair Loss: DHT, Treatments, and Regrowth Expectations

PCOS hair loss is often driven by androgen activity and DHT-sensitive scalp follicles. Learn what the thinning pattern usually looks like, which treatments help most, and what realistic regrowth timelines actually look like.

Hair loss is one of the most upsetting PCOS symptoms because it can feel both visible and hard to control. Many people expect polycystic...

PCOS Symptoms: Irregular Periods, Acne, Hair Growth, and Weight Gain

Learn the most common PCOS symptoms, including irregular periods, acne, excess hair growth, and weight gain, plus what can mimic PCOS and when to get tested.

PCOS symptoms rarely arrive as one neat package. More often, they build slowly: a cycle that keeps drifting, acne that no longer behaves like...

PCOS vs Insulin Resistance: How They’re Linked and What Helps

Understand the difference between PCOS and insulin resistance, how they overlap, which symptoms and tests matter most, and what lifestyle and medical treatments can help.

PCOS and insulin resistance are often mentioned in the same breath, which makes it easy to assume they are the same thing. They are...

Perimenopause Dizziness: Why You Feel Lightheaded and When to Get Checked

Understand perimenopause dizziness, including why you may feel lightheaded, how hormones can contribute, which other causes to rule out, and when dizziness should be medically checked.

Dizziness during perimenopause can be unsettling because it is vague, sudden, and easy to second-guess. One person feels briefly lightheaded when standing up. Another...

Perimenopause: Early Signs, Hormone Changes, and What Helps

Learn the early signs of perimenopause, the hormone changes behind irregular periods and hot flashes, when testing helps, and which lifestyle, nonhormonal, and hormone therapy options can make this transition easier.

For many women, perimenopause does not begin with a dramatic hot flash. It begins with a sense that something is shifting. Periods arrive earlier...

Perimenopause in Your 30s: Early Signs People Miss and What to Track

Perimenopause in your 30s can be real, but it is easy to misread. Learn the early signs people miss, what symptoms to track, when hormone tests help, and when to look beyond perimenopause for another cause.

When symptoms start shifting in your 30s, it is easy to feel as though your body has gone slightly out of focus. Periods may...

Perimenopause Rage: Why Anger and Irritability Spike and What Helps

Perimenopause rage can show up as sudden anger, irritability, and a much shorter fuse. Learn why hormone shifts, sleep disruption, and stress overload can intensify mood symptoms and what actually helps.

Perimenopause rage is one of those symptoms many people feel before they have language for it. What shows up is not always sadness or...

Period Flu: Body Aches, Chills, and Why You Feel Sick Before Your Period

Understand what “period flu” usually means, why body aches and chills can happen before your period, what symptoms are typical, what helps, and when you should get checked.

Some people know exactly when their period is coming, not because of bleeding, but because their body starts to feel strangely unwell. They ache,...

PFAS and Thyroid Health: What Research Suggests and How to Reduce Exposure

PFAS and thyroid health research suggests possible links with hormone changes and thyroid dysfunction, but the evidence is mixed. Learn what PFAS are, what studies actually show, and how to reduce exposure in practical, sustainable ways.

PFAS have moved from an environmental science topic into everyday health conversations for one simple reason: they are hard to avoid, slow to break...

Pheochromocytoma: Symptoms, Testing, and When to Suspect It

Learn the key pheochromocytoma symptoms, how testing with metanephrines usually works, what can cause false-positive results, and when this rare adrenal tumor becomes worth suspecting.

Pheochromocytoma is one of those diagnoses that attracts attention because the symptoms can be dramatic, but the condition itself is rare. A person may...

Phosphatidylserine for High Cortisol: Benefits, Dosage, and Who Should Avoid It

Phosphatidylserine for high cortisol may offer modest stress-support benefits in some people, but the evidence is limited and the right dose, timing, and safety checks matter. Learn what the supplement may help, how much to take, which side effects and medication interactions matter, and when high cortisol symptoms need proper medical testing instead.

Phosphatidylserine is one of those supplements that sounds highly specific and quietly persuasive. It is often recommended for “high cortisol,” stress-related sleep problems, exercise...

Pituitary Gland Explained: Hormones It Controls and Common Disorders

Learn what the pituitary gland does, which hormones it controls, how pituitary disorders affect the body, and the common symptoms, tests, and treatments that matter most.

The pituitary gland is small enough to sit in a bony pocket at the base of the brain, yet its reach extends through almost...