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Expert profile

Dr Kent Holtorf

Physician; host of the Peptides and Longevity podcast (Big Doc Energy)

8checked quotes
0on dosing
8peptides

Holtorf is a US physician who hosts a podcast on peptides and longevity. Quotes here come from his solo introduction to peptide classes.

iNo endorsement. Dr Kent Holtorf is quoted for public statements only and does not endorse this site. Quotes are word for word; follow each link for the full context.

AOD-9604

Weight & metabolism

On safety & evidence

What it is

“and then aod is a fraction of growth hormone. It does not increase, um, igf1, which is how, uh, most the effects of growth hormone [… happen], but it has its own rejuvenating effects and also does boost metabolism”

Watch at 17:53Peptides 101 (Peptides and Longevity podcast / Big Doc Energy, Dr Kent Holtorf) · 5 Feb 2025

Context: From his solo introduction to peptide classes on his podcast. He gives no dose.

Melanotan II

Sexual health & tanning

On safety & evidence

Age and dark spots

“there's melanotan one and then two which is uh which is available: you get tan, you lose weight, increase libido, increase erectile function […] but the problem is if you're young that's great, you get tan, but if you're older it will bring out dark spots”

Watch at 26:33Peptides 101 (Peptides and Longevity podcast / Big Doc Energy, Dr Kent Holtorf) · 5 Feb 2025

Context: From his solo introduction to peptide classes. The cut removes his nickname for it. He gives no dose.

Epitalon

Healthy ageing & energy

On safety & evidence

Pineal peptides and long-term studies

“uh one probably the best anti-aging hormone, uh, studies show when you take it, uh, they've done studies, uh, basically people over 65 years old, uh, significant cardiovascular disease, spa for, for 14 years, uh, dramatic reduction immortality, morbidity, they live longer”

Watch at 15:13Peptides 101 (Peptides and Longevity podcast / Big Doc Energy, Dr Kent Holtorf) · 5 Feb 2025

Context: Talking about the pineal peptides (epitalon and related). Auto-captions are garbled (“immortality” is probably “in mortality”); he does not name the study. The Khavinson studies we could verify are listed below.

SS-31 (elamipretide)

Healthy ageing & energy

On safety & evidence

Cost of an effective dose

“ss31, um, is in tons of Trials. It improves mitochondrial function. It's basically an antioxidant inside the mitochondria, uh, for right now it's very expensive to get the dose that works, but a lot of great studies coming out on that”

Watch at 25:27Peptides 101 (Peptides and Longevity podcast / Big Doc Energy, Dr Kent Holtorf) · 5 Feb 2025

Context: He does not state the dose he means.

DSIP

Calm, focus & sleep

On safety & evidence

Sleep and inflammation

“Delta Sleep does, uh, like what it says, is a Sleep Center, but it's very anti-inflammatory, so one of the things it, it likely does is lower the inflammation in the hypothalamus and that really helps you get deep sleep”

Watch at 22:41Peptides 101 (Peptides and Longevity podcast / Big Doc Energy, Dr Kent Holtorf) · 5 Feb 2025

Context: No dose given. Earlier he describes combining epitalon or other pineal peptides with delta sleep-inducing peptide for people who “can't sleep like myself”.

Thymosin alpha-1

Immune support

On safety & evidence

Use in infections

“thymus in alpha 1 is, uh, proof for infections, it raises that th1, uh, thymus”

Watch at 21:02Peptides 101 (Peptides and Longevity podcast / Big Doc Energy, Dr Kent Holtorf) · 5 Feb 2025

Context: Captions are garbled: “thymus in alpha 1” is thymosin alpha-1 and “proof” is probably “approved”. It is approved in some countries outside the EU and US (see the notice above).

LL-37

Immune support

On safety & evidence

Antimicrobial peptide

“antimicrobial peptides, um, ll37 is a big one, very broad range of antimicrobial, um, properties that your body secretes, actually stem cells secrete them, it also stimulates stem cells”

Watch at 20:47Peptides 101 (Peptides and Longevity podcast / Big Doc Energy, Dr Kent Holtorf) · 5 Feb 2025

Context: No dose given.

KPV

Immune support

On safety & evidence

What it is

“now kpv is a tiny tripeptide fraction of alpha mesite stimulating hormone. It has more anti-inflammatory effects actually than the whole peptide, but it actually does not stimulate, um, the banocy, so you don't get the darkening of the skin, which is good, plus it's small so it can absorb orally, can cross the blood bra barrier”

Watch at 26:55Peptides 101 (Peptides and Longevity podcast / Big Doc Energy, Dr Kent Holtorf) · 5 Feb 2025

Context: Captions: “alpha mesite” is alpha-melanocyte, “banocy” melanocytes, “blood bra barrier” blood-brain barrier. Oral absorption in people has not been shown in trials; the oral data we found are in mice.

Sources used (1)