HoldsUp

FoundMyFitness · 2025-04-28 · Rhonda Patrick (host), Andy Galpin

Dr. Andy Galpin: The Optimal Diet, Supplement, & Recovery Protocol for Peak Performance

85 research-tied claims examined: 5 contradicted 11 overstated 4 context 58 supported 7 unverified

11

Overstated

0:50:45Andy Galpinoverstatedmoderate

Carbohydrates converted to lactate or pyruvate during anaerobic exercise are ultimately fully metabolized in the mitochondria through oxidation.

"anything you just burned there that's sitting either in lactate or in pyruvate or some other intermediate from there, it's going to be finished in the mitochondria with oxidation." (said at 0:50:45)

The assertion that all intermediate products of glycolysis (such as lactate and pyruvate) formed during exercise are ultimately oxidized in the mitochondria overstates the exclusivity of the oxidative pathway. While mitochondrial oxidation is established as the primary fate for lactate and pyruvate disposal following exercise, published metabolic evidence demonstrates that a significant portion of post-exercise lactate serves non-oxidative functions. Specifically, lactate acts as a major gluconeogenic precursor (converted back into glucose or glycogen in the liver, kidneys, and skeletal muscle) as well as a substrate for amino acid synthesis.

0:55:55Andy Galpinoverstatedmoderate

A study co-authored by Andy Galpin found that consuming whole eggs resulted in greater increases in muscle mass and strength compared to consuming isonitrogenous and isocaloric egg white powder during resistance training.

"Now, you published an interesting study on egg egg white powder versus the whole egg. But I'd I'd love to like to know your thoughts in general. GUEST1: Yeah, that was um actually a pretty cool study... That particular uh paper and actually set of studies on that found basically the same thing. So whole egg versus egg white. And it turns out potentially—we don't we didn't have mechanisms behind this—but potentially some of the stuff that's in the egg yolk itself was contributing to additional muscle growth micronutrient-wise." (said at 0:55:55)

A 2021 randomized controlled trial co-authored by Andy Galpin (Bagheri et al.) evaluated 30 resistance-trained young men consuming either whole eggs or an isonitrogenous quantity of egg whites post-exercise during 12 weeks of resistance training. The study found significantly greater improvements in muscular strength (knee extension and handgrip), serum testosterone, and body fat reduction in the whole egg group compared to the egg white group. However, there were no statistically significant between-group differences in knee extensor muscle mass or muscle cross-sectional area (only a non-significant trend for lean body mass, p = 0.06). In addition, the interventions were isonitrogenous rather than isocaloric.

1:23:15Andy Galpinoverstatedlow

Sleep disturbances such as mild sleep apnea trigger splenic contractions at night, causing iron biomarkers to fluctuate significantly on blood tests.

"Iron is like it's also insanely related to sleep quality. So you will see numbers go all over the board when you are having splenic contractions at night because you're having mild sleep apnea or other disturbances." (said at 1:23:15)

While acute apnea and hypoxia can trigger splenic contraction that releases stored red blood cells and causes small, transient increases in hemoglobin concentration (~1–3%), there is no published evidence demonstrating that nocturnal splenic contractions from mild sleep apnea cause iron biomarkers (such as serum iron or ferritin) to fluctuate significantly on clinical blood tests. Splenic contraction mobilizes erythrocytes rather than circulating iron biomarkers, making the claim that it causes iron blood test values to go 'all over the board' an overstatement of splenic physiology and clinical evidence.

1:59:20Andy Galpinoverstatedhigh

Darren Candow has conducted research on continuous daily creatine supplementation at doses of 20 grams per day over years.

"Darren's actually done some stuff at 20 grams a day for years. So, as long as you're not getting nausea—nausea is like the number one thing we get, like 'I got nauseous.' Okay, great. So, if you're not getting that, we run that train pretty high pretty often." (said at 1:59:20)

Darren Candow and colleagues have conducted long-term randomized clinical trials on creatine supplementation, most notably a 2-year trial in 237 postmenopausal women. However, that study evaluated a relative dose of 0.14 g/kg/day (approximately 8–10 g per day for typical body weights), not a continuous daily dose of 20 grams per day for years. In the creatine literature, 20 g/day is standardly used for short loading phases lasting 5 to 7 days, rather than continuous multi-year daily dosing. While systematic reviews co-authored by Candow indicate that creatine is well-tolerated without dose-dependent adverse effects, claiming Candow conducted trials administering 20 g/day continuously for years substantially overstates the dose tested in his multi-year research.

2:00:40Andy Galpinoverstatedmoderate

Sodium bicarbonate topical creams applied 30 to 60 minutes before exercise acutely improve high-intensity performance without causing GI distress.

"Momentous makes PR lotion. That's exactly what PR lotion is: it's just a sodium bicarbonate cream. So, this is local. If you're using your arms today, you can put it on your arms. You don't have to put it through your GI tract at all... It takes some time to get in and get into tissue. But yeah, this is an acute effect." (said at 2:00:40)

The speaker claims that sodium bicarbonate topical creams (such as Momentous PR lotion) applied 30 to 60 minutes prior to exercise acutely improve high-intensity performance without causing GI distress. While transdermal application does avoid gastrointestinal side effects associated with oral sodium bicarbonate loading, randomized controlled trials demonstrate that topical sodium bicarbonate creams generally do not reliably improve high-intensity exercise performance or blood buffering capacity. A double-blind trial by McKay et al. (PMID: 32575069) showed that PR lotion applied 30 or 90 minutes before cycling tasks was ineffective at altering blood buffering capacity or exercise performance. Ranchordas et al. (PMID: 39222921) similarly reported that oral sodium bicarbonate improved repeated sprint performance during simulated soccer play, whereas topical PR lotion did not. An earlier RCT by Ranchordas et al. (PMID: 37227399) noted a 2% improvement in repeated sprint times with topical PR lotion, but found no significant benefit for Yo-Yo IR2 distance or blood acid-base parameters compared to placebo. Because acute performance benefits are weak, inconsistent, and absent in most trials, the general claim of performance enhancement is overstated.

2:28:46Rhonda Patrick (host)overstatedvery low

A rodent study using radiolabeled hydrolyzed collagen demonstrated intact peptides reaching the tendons.

"The study that convinced me of that very question that you were asking was actually published a while ago, over a decade ago, and it was an animal study where hydrolyzed collagen powder was radio-labeled and intact peptides were making their ways to the tendons." (said at 2:28:46)

The speaker is referencing a seminal 1999 animal study by Oesser et al., in which C57/BL mice were orally administered 14C-radiolabeled gelatin hydrolysate (hydrolyzed collagen). The study demonstrated that 95% of the hydrolysate was absorbed within 12 hours, with intestinal absorption of peptides between 2.5 and 15 kDa, and that radioactivity preferentially accumulated in cartilage (more than twice the level observed in the proline control group). However, the study specifically measured and demonstrated tissue accumulation in cartilage rather than tendons. Because this evidence comes exclusively from rodent and ex vivo gut-sac models, certainty is very low.

2:06:44Andy Galpinoverstatedhigh

Co-ingesting vitamin C with iron is necessary or beneficial to assist with iron absorption.

"Not to get us back there, but you start actually looking at iron. What it does when you co-ingest iron with vitamin C. If you're going to go after iron, you probably should bring vitamin C along." (said at 2:06:44)

While ascorbic acid (vitamin C) enhances non-heme iron absorption in single-meal laboratory settings, clinical trials show that routinely co-ingesting vitamin C with iron supplements provides no significant clinical benefit over iron supplementation alone. In a randomized clinical equivalence trial of 440 adults with iron deficiency anemia, oral iron alone was equivalent to iron plus vitamin C for improving hemoglobin recovery (1.84 g/dL vs 2.00 g/dL mean increase at 2 weeks) and serum ferritin levels (PMID 33136134). Furthermore, studies evaluating whole diets demonstrate that the facilitating effect of vitamin C on overall iron absorption is far weaker across complete diets than in isolated single meals (PMID 11124756).

2:38:28Andy Galpinoverstatedmoderate

Neuromuscular electrical stimulation devices (such as Firefly) have been shown in multiple studies to be effective for athletic recovery.

"We'll use Firefly, that little tiny device you can put on the front of your leg. It's a little strip. Makes your toe bing-bing kind of up down move. You can do it for hours a day... That's been shown a bunch of times to be super effective for recovery." (said at 2:38:28)

The speaker claims that neuromuscular electrical stimulation (NMES) devices like Firefly (applied to the leg/peroneal nerve to elicit foot twitches) have been shown in multiple studies to be "super effective for recovery." While study data using peroneal nerve NMES specifically show a modest reduction in self-reported perceived muscle soreness following intense exercise (PMID: 25011496), broader systematic reviews and meta-analyses show that NMES applied post-exercise does not significantly improve muscle soreness or objective recovery markers (such as muscle strength, blood lactate clearance, or markers of muscle damage/inflammation) compared to active recovery or rest (PMID: 40954632, PMID: 35185620, PMID: 31684705). Claiming it has been repeatedly proven to be "super effective" overstates the strength, consistency, and magnitude of the scientific evidence.

2:52:28Andy Galpinoverstatedlow

Cold water immersion is more effective for reducing muscle soreness than whole-body cryotherapy or cold showers.

"It seems pretty clear, based upon the data that is available, that cold water immersion is more effective than something like cryotherapy, right? Or cold shower. Um, there has been some papers that showed cryotherapy itself did help with muscle soreness, but if you stack them again against the the cold water immersion, the water wins." (said at 2:52:28)

While cold water immersion (CWI) has a larger and more robust body of evidence for reducing delayed-onset muscle soreness (DOMS) than cold showers or whole-body cryotherapy (WBC), direct head-to-head evidence does not clearly establish CWI as definitively superior across all contexts. Individual randomized trials comparing CWI directly against WBC have shown mixed results: some found CWI yielded better muscle soreness ratings post-marathon (PMID: 29127510), whereas others found similar reductions in soreness (PMID: 29130570), and a 2024 network meta-analysis ranked cryotherapy slightly higher for relieving DOMS (PMID: 39294614). Evidence evaluating cold showers specifically remains very sparse compared to full immersion.

2:59:24Andy Galpinoverstatedmoderate

Cold water immersion causes sympathetic activation for 15 to 30 minutes post-exposure, followed by an elevation in parasympathetic drive and heart rate variability of 20% to 50% for up to three hours.

"when you go into the ice, whether this is anywhere between 30 to 50° for a minute to 5 minutes, you're generally going to get out of that ice and you will see sympathetic drive. Fight or flight is elevated like pretty consistently. That said, we plotted this every 15 minutes for up to three hours post, and you just continually see a rise in parasympathetic drive for up to three hours post... somewhere between 15 to 30 minutes post ice exposure you'll be more sympathetically driven, but after that for several hours in most of the people they were far more—and I'm talking about like 20 to 50% elevations rather in HRV, meaning more parasympathetic for many hours." (said at 2:59:24)

Published literature confirms the general direction of the physiological response: acute cold-water immersion triggers an initial sympathetic stress response, followed by parasympathetic reactivation and increases in vagally mediated heart rate variability (HRV) metrics (such as RMSSD and high-frequency power). Systematic reviews and meta-analyses demonstrate moderate-to-large increases in post-exposure parasympathetic markers. However, claiming a consistent 15- to 30-minute post-immersion sympathetic delay followed by a 20% to 50% rise in HRV persisting for up to 3 hours overstates the published evidence. Meta-analytic data show that parasympathetic reactivation often begins immediately post-immersion and is most consistently documented over shorter observation windows (e.g., 15 to 60 minutes), with substantial inter-individual variability depending on temperature, immersion duration, and baseline fitness.

2:12:44Andy Galpinoverstatedlow

When bedroom carbon dioxide levels rise above 900 parts per million, it significantly impairs sleep onset, sleep quality, next-day perceived fatigue, and arithmetic performance.

"CO2 levels rise above 900 parts per million, this will significantly and dramatically affect everything from sleep onset, sleep quality, next-day perceived fatigue, next-day arithmetic ability." (said at 2:12:44)

The claim is based on a small crossover intervention study (Strøm-Tejsen et al., 2016, N=16) in dormitory bedrooms where ventilation fans were triggered when CO2 exceeded 900 ppm, resulting in average bedroom CO2 concentrations of 835 ppm versus 2,395 ppm. In that study, lower CO2 / higher ventilation improved actigraphy-measured sleep quality, morning freshness, next-day sleepiness, and logical thinking performance. However, describing the threshold as an established point above which CO2 'dramatically' impairs sleep onset and next-day arithmetic ability overstates the evidence: 900 ppm was the control threshold for fan activation in a small pilot trial comparing moderate ventilation (~835 ppm) to poor ventilation (~2,400 ppm), rather than an isolated tipping point demonstrated to cause drastic impairments across all these specific domains.

  • partial: The effects of bedroom air quality on sleep and next-day performance. (Indoor air 2016) · cited 225x in the literature
    "In the second experiment (N = 16), an inaudible fan in the air intake vent was either disabled or operated whenever CO2 levels exceeded 900 ppm (the resulting average CO2 level was 2395 or 835 ppm)... Objectively measured sleep quality and the perceived freshness of bedroom air improved significantly when the CO2 level was lower, as did next-day reported sleepiness and ability to concentrate and the subjects' performance of a test of logical thinking." (abstract, results)
    pubmedfull study (doi)

Unverified means no publication matching the claim was located; it does not prove the claim false. Spotted an error? See the corrections policy - disputes from the people quoted are prioritized.