Evidence-Based Supplement & Herb Guides

Hypothalamic Amenorrhea: Missed Periods, Under-Fueling, and Recovery Basics

Learn what hypothalamic amenorrhea is, why under-fueling and stress can stop periods, how doctors diagnose it, and what recovery usually involves for cycle and bone health.

A missed period can feel easy to explain away. Training got harder, life got busier, meals became “cleaner,” sleep got worse, and the cycle...

Hypothyroidism Symptoms: Fatigue, Weight Gain, and Brain Fog

Learn the most common hypothyroidism symptoms, including fatigue, weight gain, and brain fog, plus causes, diagnosis, treatment, and what to expect as thyroid levels improve.

Hypothyroidism rarely announces itself with one unmistakable sign. More often, it arrives as a quiet slowing: mornings feel heavier, concentration slips, the scale inches...

Inositol for PCOS: Benefits for Cycles, Cravings, and Insulin Resistance

Learn how inositol may help PCOS symptoms such as irregular cycles, cravings, and insulin resistance, including the best forms, safety, dosing, and when it fits into a broader treatment plan.

For many people with PCOS, the hardest part is not a single symptom. It is the pattern: irregular cycles, stubborn cravings, rising insulin, mood...

Insulin Resistance Symptoms: Early Signs and How to Reverse It

Learn the early symptoms of insulin resistance, how it is tested, who is most at risk, and the practical food, exercise, sleep, and medical steps that can help reverse it early.

Insulin resistance often begins quietly. Long before someone is told they have prediabetes or type 2 diabetes, they may notice smaller changes that do...

Iodine and Thyroid: When It Helps and When It Makes Things Worse

Learn when iodine supports thyroid health, when supplements help, and why too much iodine can worsen hypothyroidism, hyperthyroidism, nodules, or autoimmune thyroid disease.

Iodine has an unusual reputation in thyroid health. It is essential, but it is not gentle. The thyroid needs iodine to make T4 and...

Iodized Salt vs Sea Salt: Thyroid Support, Iodine Needs, and Sodium Tradeoffs

Learn whether iodized salt or sea salt is better for thyroid support, how much iodine you actually need, and how to balance iodine intake with smart sodium limits for everyday health.

Salt has become a surprisingly emotional food. For some people, sea salt feels cleaner and more natural. For others, iodized salt sounds old-fashioned or...

Irregular Periods: Hormone Causes, Common Tests, and Next Steps

Learn what irregular periods can mean, which hormone causes are most common, what tests doctors often order, and when cycle changes need faster evaluation or treatment.

A menstrual cycle rarely follows a perfect calendar, but there is a difference between normal variation and a pattern that signals ovulation or hormone...

Kidney Stones and Calcium: When High Calcium Is the Cause

Learn when kidney stones point to high calcium in the blood, how hyperparathyroidism fits in, which tests matter most, and how to prevent recurrence without making calcium mistakes.

Many people hear they have a “calcium stone” and immediately assume they must be eating too much calcium. That sounds logical, but it is...

Late-Night Eating and Hormones: Blood Sugar, Cortisol, and Morning Hunger

Learn how late-night eating affects blood sugar, cortisol, sleep, and morning hunger, plus practical ways to reduce cravings, improve meal timing, and support steadier hormone rhythms.

Late-night eating often gets framed as a simple discipline problem: eat earlier, sleep better, lose weight. Real life is rarely that neat. Evening hunger...

Leptin Resistance: Hunger, Weight Gain, and What Helps

Learn what leptin resistance is, why it can drive hunger and weight gain, how it overlaps with insulin resistance and poor sleep, and what practical strategies can actually help.

There is a particular kind of hunger that feels less like simple appetite and more like a signal that never fully turns off. You...

Levothyroxine and Coffee: How Long to Wait and What Affects Absorption

Learn how long to wait between levothyroxine and coffee, why absorption changes, which foods and supplements interfere most, and how to build a routine that keeps thyroid labs more stable.

Levothyroxine looks simple on paper: one tablet, one dose, once a day. In real life, it is one of the easiest medications to take...

Levothyroxine and Iron or Calcium: Timing Mistakes That Can Raise TSH

Learn how iron and calcium can block levothyroxine absorption, raise TSH, and mimic treatment failure, plus the timing rules and practical routines that help keep thyroid labs stable.

A thyroid dose can look perfect on paper and still fail in real life because of timing. That is what makes levothyroxine frustrating for...

Levothyroxine at Night vs Morning: Which Works Better and Who Might Prefer Each

Levothyroxine at night versus morning usually comes down to consistency, absorption, and daily routine. Learn which schedule may work better, who might prefer each, and how to switch safely without destabilizing thyroid labs.

For many people with hypothyroidism, levothyroxine becomes the most routine part of the day and also the most inconvenient. It can shape when coffee...

LH and FSH Explained: What They Mean for Fertility and Hormone Health

Understand what LH and FSH mean for fertility and hormone health, including cycle timing, PCOS, primary ovarian insufficiency, male hormone patterns, and how to interpret results without common mistakes.

LH and FSH are two of the most commonly ordered reproductive hormones, yet they are also two of the easiest to misunderstand. A lab...

Liquid Levothyroxine vs Tablets: Absorption, Timing, and Who Might Benefit

Compare liquid levothyroxine and tablets for absorption, timing, coffee and supplement interactions, and learn which patients may benefit most from switching formulations.

Levothyroxine looks simple on paper: replace what the thyroid no longer makes, recheck labs, and move on. In practice, it can be one of...

Low Cortisol Symptoms: Fatigue, Dizziness, and Low Blood Pressure

Learn the real symptoms of low cortisol, including fatigue, dizziness, and low blood pressure, plus the common causes, proper testing, treatment options, and emergency warning signs.

Low cortisol can be surprisingly hard to recognize at first. The early signs are often broad and easy to dismiss: feeling drained for weeks,...