Skip to content
Back to the library
YouTube·YouTube publication: May 31, 2025

Low testosterone isn’t caused by aging—it’s usually vitamin deficiencies, not “manopause.”

Hormones
Open on YouTube
Video shape
From the original video description

Original sourceDan Purser MD on YouTube

Read the conversation.

YouTube captions · Unreviewed · Imported 2026-09-24

Captions can mishear medical terms, names, and doses. Check the recording for context. Each timestamp opens that moment on YouTube.

6 timestamped passages

0:02

You commonly have men coming in every single day, too. What do they come in for you that? Yeah. Low low testosterone, no libido. You know, the wife usually makes them come in. Yeah. They drag them in by their, you know, put in their nose and drag them in. And literally the guys are like, I'm doing good. I was like, "No, he's not. He's tired all the time. He has no ambition,

0:18

no li no libido. It's completely falling off. He's kind of depressed. He sits and watches TV all in the evening when he comes in. He can he hardly get up in the morning, go to work, and and He doesn't need aderal. He doesn't need stem drinks, stimulant drinks. Those don't work. And and he's still tired even when

0:35

he drinks them. Um and so we saw you on TikTok or whatever and want to test it. Yeah. The number one cause of men's low testosterone is not pituitary damage or or or um or testicular damage. Though I do rule those out right up front. We

0:51

make sure that's not what's going on. Um but it's vitamin deficiencies. I mean, so I don't believe in menopause either. I don't believe in men go through the age aging process and their testosterone levels drop naturally. Don't believe it.

1:07

I've seen too many guys in their 60s and 70s uh with normal level high levels of testosterone above 1100. Um and if any of you know testosterone levels, that's a really good healthy above 800 is normal. So men's testosterone levels should not drop as they age. Is the conclusion of that, right? Right. No.

1:23

Yeah. Shouldn't I don't believe in menopause. I haven't seen it. I've seen vitamin Oops, but not manopause.

ONE MORE CONNECTION MADE

Keep your curiosity going.

A LITTLE CLARITY

Understand the terms

Open a short reference guide.

Testosterone, bioavailable — lab reference→Testosterone, free — lab reference→Testosterone, total — lab reference→

FOLLOW YOUR CURIOSITY

Go deeper into this discussion

Menopause & estrogen questions

Mentions menopause in the captions.

Hormones topicWatch at 0:51 ↗

Connections follow subject mentions. Read or watch the source for context.

FOLLOW THE THREAD

Hormones & life stages

A place for your questions about thyroid, hormones, fertility, and changes across life.

Explore this topic
A note on the archive

These are the original author’s words and perspectives. Older material may reflect earlier teaching. Use the source and publication date for context.

MORE FROM PURSER WELLNESS

Genetic testing + consultationExplore your inherited patterns.
Physician DesignedMeet the products behind the teaching.
CMA testing + consultationExplore intracellular nutrient testing.

Keep following the thread.

More to explore

A term in this discussion

PURSER WELLNESSTestosterone, total — lab referenceFrom the reading room
Approved lab referenceFrom the archive

Testosterone, total — lab reference

Morning collection preferred for men. Method and age matter; confirm unexpected low values.

Testing

A term in this discussion

PURSER WELLNESSTestosterone, free — lab referenceFrom the reading room
Approved lab referenceFrom the archive

Testosterone, free — lab reference

Mayo example age 20-24: M 5.25-20.7; F <0.13-1.08. Declines with age and is method-dependent.

Testing

A term in this discussion

PURSER WELLNESSTestosterone, bioavailable — lab referenceFrom the reading room
Approved lab referenceFrom the archive

Testosterone, bioavailable — lab reference

Depends on total testosterone, SHBG, albumin, calculation, and assay.

Testing

More on Menopause & estrogen questions

PURSER WELLNESSESR1From the reading room
Gene referenceSep 23, 2026

ESR1

ESR1 encodes estrogen receptor alpha, which helps cells respond to estrogen. Receptor signaling is different from the amount of estrogen measured in blood.

Genetics
Purser Wellnessexplore

Good questions open new doors.

Dan Purser MD Physician Designed YouTube Substack Find My PathwayCoursesNutrients & foodsGenes & pathwaysBooks & chaptersAbout this library
© 2026 Purser Wellness

For education. The archive includes clinical perspectives and historical material; it does not replace individual medical care.

Sources & coverageAbout the teachingPrivacyContact & help
Purser Wellnessexplore
DiscoverTopicsCoursesWatchReadAsk Purser
My learning
Low testosterone isn’t caused by aging—it’s usually vitamin deficiencies, not “manopause.” — Purser Wellness Explore