9 Overstated
Skeletal muscle creatine stores can be fully saturated in 2 days using a high-dose loading strategy of 20 grams per day, or in 21 to 30 days using a continuous daily dose of 2 to 5 grams without loading.
"And so that's 20 grams a day for about 7 days is usually what's recommended. A bit of new information: you only need to do that for 2 days and then your muscles are saturated... The good news is you can take as little as 2 to 3 grams a day, no loading phase, and take that on a daily basis probably for the rest of your life, and that will definitely accumulate and fill up your muscles in about 30 days... Easily 21 days your muscles will be full [at 5 grams a day]." (said at 0:19:54)
The claim bundles two distinct dosing timelines. The assertion that a daily dose of 3 g/day (or 3 to 5 g/day) achieves full skeletal muscle creatine saturation in roughly 28 to 30 days without a loading phase is supported by classic randomized trials. However, the claim that 20 g/day for only 2 days fully saturates muscle creatine stores is overstated; clinical trials and sports nutrition position stands demonstrate that high-dose loading (20 g/day or ~0.3 g/kg/day) requires 5 to 7 days to reach full saturation.
- partial: Muscle creatine loading in men. (Journal of applied physiology (Bethesda, Md. : 1985) 1996) · cited 815x in the literature
"Muscle total creatine concentration increased by approximately 20% after 6 days of creatine supplementation at a rate of 20 g/day. This elevated concentration was maintained when supplementation was continued at a rate of 2 g/day for a further 30 days... A similar, but more gradual, 20% increase in muscle total creatine concentration was observed over a period of 28 days when supplementation was undertaken at a rate of 3 g/day." (abstract, results, passage verified)
pubmedfull study (doi)
Creatine inhibits osteoclast activity and bone resorption, demonstrating anti-resorptive properties similar to bisphosphonates.
"Um so creatine reduces something called the osteoclast activity or bone resorption. So for some reason, it really inhibits these osteoclasts from sort of chopping down our bone and increasing blood calcium levels when not needed." (said at 0:25:15)
The claim is overstated. Short-term randomized controlled trials in older adults undergoing resistance training have observed modest decreases in urinary markers of bone resorption, such as cross-linked N-telopeptides of type I collagen (NTx). However, evidence is limited, primarily observed as a surrogate biomarker response to combined resistance training and supplementation rather than potent direct osteoclast inhibition, and longer-term 12-month trials have shown no significant differences in bone mineral density or bone geometry compared to placebo.
- supports: Low-dose creatine combined with protein during resistance training in older men. (Medicine and science in sports and exercise 2008) · cited 167x in the literature
"Subjects receiving creatine (C and CP) experienced a decrease in 3-MH by 40% compared with an increase of 29% for PLA (P < 0.05) and a reduction in NTx (-27%) versus PLA (+13%; P = 0.05)." (abstract, results, passage verified)
pubmedfull study (doi) - context: Effect of 12 months of creatine supplementation and whole-body resistance training on meas… (Nutrition and health 2021) · cited 46x in the literature
"After 12 months of training, both groups experienced similar changes in bone mineral density and geometry, bone speed of sound, lean tissue and fat mass, muscle thickness, and muscle strength." (abstract, results, passage verified)
pubmedfull study (doi) - context: Anti-Inflammatory and Anti-Catabolic Effects of Creatine Supplementation: A Brief Review. (Nutrients 2022) · cited 47x in the literature
"From a musculoskeletal perspective, there is some evidence to show that creatine supplementation reduces measures of muscle protein catabolism (primarily in males) and bone resorption when combined with resistance training." (abstract, passage verified)
pubmedfull study (doi)
Creatine supplementation combined with resistance training has not been shown to increase bone mineral density in human studies, but it reduces the rate of bone mineral density loss, especially around the hip.
"And there's been about 15 studies now showing that it has a lot of anti-resorptive effects—so think of anti-catabolic to the bone. Uh we have not shown in a single study an increased bone mineral density. So this is really crucial: we are not saying that creatine and weight training increases bone mineral density, but it certainly decreases bone mineral density loss, and really specifically around the hip region" (said at 0:25:55)
The speaker correctly notes that creatine combined with resistance training does not increase bone mineral density (BMD). However, claiming that it 'certainly decreases bone mineral density loss, and really specifically around the hip region' is overstated. While an initial 12-month randomized controlled trial in postmenopausal women found that creatine attenuated femoral neck BMD loss compared to placebo, subsequent larger and longer studies (including a 2-year randomized trial in 237 women) as well as meta-analyses found no statistically significant difference in BMD loss at the hip, femoral neck, or spine compared to resistance training alone, although some positive effects on bone geometric strength properties have been observed.
- supports: Effects of Creatine and Resistance Training on Bone Health in Postmenopausal Women. (Medicine and science in sports and exercise 2015) · cited 83x in the literature
"Cr attenuated the rate of femoral neck BMD loss (-1.2%; absolute change (95% confidence interval), -0.01 (-0.025 to 0.005) g·cm) compared with Pl (-3.9%; -0.03 (-0.044 to -0.017) g·cm; P < 0.05)" (abstract, results, passage verified)
pubmedfull study (doi) - contradicts: Creatine Supplementation During Resistance Training Does Not Lead to Greater Bone Mineral … (Frontiers in nutrition 2018) · cited 27x in the literature
"Meta-analyses revealed no greater effect of creatine and resistance training compared to resistance training alone on whole body BMD (MD: 0.00, 95% CI -0.01 to 0.01, p = 0.50), hip BMD (MD -0.01, 95% CI -0.02 to 0.01, p = 0.26), femoral neck BMD (MD 0.00, 95% CI -0.01 to 0.01, p = 0.71), and lumbar spine BMD (MD 0.01, 95% CI -0.01 to 0.03, p = 0.32)." (abstract, results, passage verified)
pubmedfull study (doi) - contradicts: A 2-yr Randomized Controlled Trial on Creatine Supplementation during Exercise for Postmen… (Medicine and science in sports and exercise 2023) · cited 32x in the literature
"Compared with placebo, creatine supplementation had no effect on BMD of the femoral neck (creatine: 0.725 ± 0.110 to 0.712 ± 0.100 g·cm -2 ; placebo: 0.721 ± 0.102 to 0.706 ± 0.097 g·cm -2 ), total hip (creatine: 0.879 ± 0.118 to 0.872 ± 0.114 g·cm -2 ; placebo: 0.881 ± 0.111 to 0.873 ± 0.109 g·cm -2 ), or lumbar spine" (abstract, results, passage verified)
pubmedfull study (doi)
Creatine supplementation in combination with exercise improves muscle strength and reduces bone mineral density loss in postmenopausal females.
"females get an improvement in muscle performance, primarily strength. That's the population we've seen the best bone benefits—now, they were postmenopausal, but reduction in bone mineral density loss, bone strength." (said at 0:33:05)
Creatine supplementation combined with resistance training consistently improves muscle strength and lean body mass in postmenopausal women. However, evidence that it reduces bone mineral density (BMD) loss is inconsistent and largely unconfirmed in systematic reviews and larger clinical trials. An initial 12-month randomized controlled trial observed attenuated femoral neck BMD loss, but a subsequent larger 2-year randomized trial (n=237) and meta-analyses of postmenopausal women found no significant difference in BMD at the lumbar spine, femoral neck, or total hip compared to exercise alone, although some geometric measures of bone bending strength were preserved.
- supports: Effects of Creatine and Resistance Training on Bone Health in Postmenopausal Women. (Medicine and science in sports and exercise 2015) · cited 83x in the literature
"Cr attenuated the rate of femoral neck BMD loss (-1.2%; absolute change (95% confidence interval), -0.01 (-0.025 to 0.005) g·cm) compared with Pl (-3.9%; -0.03 (-0.044 to -0.017) g·cm; P < 0.05) and also increased femoral shaft subperiosteal width, a predictor of bone bending strength" (abstract, results, passage verified)
pubmedfull study (doi) - contradicts: A 2-yr Randomized Controlled Trial on Creatine Supplementation during Exercise for Postmen… (Medicine and science in sports and exercise 2023) · cited 32x in the literature
"Compared with placebo, creatine supplementation had no effect on BMD of the femoral neck... total hip... or lumbar spine... Creatine significantly maintained section modulus... and buckling ratio... predictive of reduced cortical bending under compressive loads, at the narrow part of the femoral neck." (abstract, results)
pubmedfull study (doi) - partial: Creatine monohydrate for lean mass, strength, and bone density in postmenopausal women: a … (Journal of the International Society of Sports Nutrition 2026) · cited 2x in the literature
"Leg-press 1RM (k = 3; n = 111) improved with creatine: MD + 7.5 kg (95% CI + 2.2 to + 12.8; I² = 0%). Benefits were evident when creatine ≥ 5 g·day⁻¹ was combined with RT... Bone density was unchanged overall." (abstract, results)
pubmedfull study (doi)
Dietary intake of 1 gram of creatine has been shown to reduce levels of neurofilament light chain, a marker of neuronal damage.
"there's another thing called neurofilament um light chain, it's an indication of neuronal damage, uh and 1 gram of creatine in your diet has been shown to reduce that." (said at 0:54:48)
A 2024 cross-sectional study analyzing data from the 2013–2014 National Health and Nutrition Examination Survey (NHANES) in 1,912 adults aged 20–75 found a statistically significant inverse correlation between estimated dietary creatine intake and serum neurofilament light chain (NfL) levels. However, because this is an observational, cross-sectional association rather than a randomized interventional trial, it cannot establish a causal relationship or prove that adding 1 gram of dietary creatine actively reduces NfL levels.
NHANES data analyzed by Sergej Ostojic shows that children consuming less than 1 gram of creatine per day in their habitual diet have higher risk of subsequent cognitive impairments and reductions in lean body mass and bone mineral content.
"again Sergej Ostojic has looked at NHANES data, and for those children taking less than 1 gram, it leads to a lot of potential detriments later on: cognition impairments, lean body mass, bone mineral." (said at 1:12:30)
Cross-sectional analyses of NHANES data by Sergej Ostojic and colleagues examined dietary creatine intake in children and adolescents, finding positive associations between creatine intake and DXA-derived lean mass and bone mineral content (PMID 34898990), as well as height and growth indicators (PMID 33806719). However, the claim is overstated: first, NHANES is cross-sectional rather than prospective, meaning it cannot demonstrate causal 'subsequent detriments later on'; second, the pediatric NHANES analyses evaluated body composition and physical growth metrics, not cognitive impairment in children.
Caffeine doses exceeding 250 mg cause an interference effect with creatine at the cellular level by opposing calcium release and uptake kinetics in the sarcoplasmic reticulum, increasing muscle relaxation time.
"Caffeine likes to release calcium, but creatine likes to take it in. And some really good research out of Europe have shown that they the two molecules oppose each other from a muscle relaxation time. But the dose of caffeine seems to be the most important factor. If the dose is over 250 milligrams or even higher, that's when it seems to have the interference effect." (said at 1:26:45)
Research from a Belgian research team demonstrated that chronic caffeine supplementation (5 mg/kg/day for 3 days, equivalent to ~350–400 mg/day for an average adult) prolonged muscle relaxation time and abolished the ~5% shortening of muscle relaxation time induced by creatine supplementation. However, the claim overstates the evidence by asserting a specific threshold of 250 mg for this interference effect, whereas the pivotal trial evaluated a body-weight-dependent dose (5 mg/kg/day) and did not establish 250 mg as a threshold cutoff.
Human studies on recommended dosages of creatine show no malignant growth or cancer promotion.
"we're not seeing any in humans, at least from recommended dosages, any uh malignant growth or any uh cancer promotion. If anything, we're seeing anti-cancer properties uh from improving inflammatory or anti-inflammatory responses there." (said at 1:37:25)
The claim that human studies on recommended dosages of creatine show no malignant growth or cancer promotion is overstated. While clinical studies and general reviews of creatine safety in humans have not established a direct link between standard creatine supplementation and primary cancer development or tumor growth (e.g., PMID 41404326), human safety data specifically focused on oncological outcomes remain very limited. Furthermore, recent research shows mixed and conflicting mechanistic effects: while some preclinical and in vitro human cell models suggest creatine can enhance anti-tumor immune responses (PMID 42006288, PMID 42255854), other recent studies indicate that exogenous creatine supplementation can cause hyperactive peripheral platelets in healthy human volunteers and promote tumor metastasis in animal models (PMID 42449108). Thus, asserting that human studies unequivocally demonstrate no cancer promotion or growth while providing anti-cancer benefits overstates the existing human evidence.
- supports: A short review of the most common safety concerns regarding creatine ingestion. (Frontiers in nutrition 2025) · cited 4x in the literature
"Although some theoretical risks, such as creatine's potential to form carcinogenic compounds, have been discussed, the available research does not support a link between creatine supplementation and cancer." (abstract, results, passage verified)
pubmedfull study (doi) - partial: Creatine Supplementation in Preclinical Models Receiving Immune Checkpoint Inhibitor Thera… (Cureus 2026)
"This systematic review emphasizes the absence of human data, highlighting a critical knowledge gap." (abstract, conclusions, passage verified)
pubmedfull study (doi) - contradicts: Exogenous creatine supplementation promotes tumor metastasis via megakaryocyte creatine ki… (Nature communications 2026)
"Importantly, creatine supplementation in healthy volunteers results in hyperactive peripheral platelets that increase metastasis risks." (abstract, results, passage verified)
pubmedfull study (doi)
Two studies have demonstrated greater increases in muscle performance and lean body mass when combining creatine with approximately 30 grams of whey protein compared to creatine alone.
"there's been two studies that show you get a greater increase in muscle performance and lean body mass when you combine creatine with protein. In this protein case, it was whey protein, it was only about 30 grams." (said at 1:44:02)
Randomized trials evaluating the combination of whey protein and creatine monohydrate during resistance training have demonstrated additive benefits compared to whey protein alone or carbohydrate placebos, but they do not robustly establish superiority over creatine alone, nor were they based on a simple ~30 g whey protein dose. For example, Burke et al. (2001) found that combining whey protein (1.2 g/kg/day) with creatine resulted in greater lean tissue mass and bench press gains than whey protein alone or placebo, but the trial lacked a creatine-only arm. Cribb et al. (2007) compared creatine plus whey, creatine plus carbohydrate, whey alone, and carbohydrate alone (at 1.5 g/kg/day) and found that while all active supplement groups significantly outperformed carbohydrate placebo for strength and hypertrophy, the combination did not consistently outperform creatine combined with carbohydrate across all measures.
- partial: The effect of whey protein supplementation with and without creatine monohydrate combined … (International journal of sport nutrition and exercise metabolism 2001) · cited 194x in the literature
"Males that supplemented with a combination of whey protein and creatine had greater increases in lean tissue mass and bench press than those who supplemented with only whey protein or placebo. However, not all strength measures were improved with supplementation, since subjects who supplemented with creatine and/or whey protein had similar increases in squat strength and knee flexion peak torque compared to subjects who received placebo." (abstract, results, passage verified)
pubmedfull study (doi) - partial: Effects of whey isolate, creatine, and resistance training on muscle hypertrophy. (Medicine and science in sports and exercise 2007) · cited 164x in the literature
"Supplementation with CrCHO, WP, and CrWP resulted in significantly greater (P < 0.05) 1RM strength improvements (three of three assessments) and muscle hypertrophy compared with CHO... Although WP and/or CrM seem to promote greater strength gains and muscle morphology during RE training, the hypertrophy responses within these groups varied." (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.