This Instagram post about testosterone decline gets a lot wrong
Quick answer
Population-level testosterone decline is documented in peer-reviewed literature but is more modest than the 50% figure cited, with studies like Travison et al. (2007) estimating roughly 15-20% over three decades, likely driven by rising obesity rates, sedentary behavior, and possibly environmental chemical exposure. Men experiencing symptoms consistent with hypogonadism, including fatigue, low libido, or mood disruption, should pursue a clinical evaluation including morning serum total testosterone measurement rather than relying on supplement-based interventions promoted on social media. TRT is an FDA-regulated treatment for diagnosed hypogonadism and requires proper clinical assessment, not a detox protocol.
Our take · Written by FormBlends editorial team · Reviewed by FormBlends Medical Team· This is not a transcript. It is our independent review of the video above.
What did @deborahmurtagh actually say?
The claim is alarming and specific: testosterone levels have "plummeted by more than 50% over the last 50 years," average levels dropped from over 600 ng/dL in the 1980s to "well below 400" by the 2000s, and men in their 20s now have testosterone levels matching their grandfather's at 70. The video blames a cocktail of culprits: PFAS chemicals, phthalates, microplastics, soy, ultra-processed food, and sugar. It ends with a paid promotion for supplements from The Wellness Company, framed as a "detox" solution.
The creator is not a clinician, but presents this as settled science. Phrases like "scientists point to" and "Harvard research found" are used without specific citations, making the claims hard to trace and easy to misread as stronger than they are.
Does the science back this up?
Partially, and the parts that are real are being stretched well past what the data actually shows. Yes, population-level testosterone has declined. No, it has not dropped 50% in 50 years, and the specific numbers cited here do not match peer-reviewed data.
The most-cited study on this is Travison et al. (2007, Journal of Clinical Endocrinology and Metabolism), which tracked three cohorts of Massachusetts men and found roughly an 18-22 ng/dL per decade decline, amounting to around 15-20% over three decades, not 50% over five. Lokeshwar et al. (2021, European Urology Focus) confirmed declining testosterone in U.S. men aged 15-39 using NHANES data, but again, the magnitude is far more modest than claimed here. The drop from 600 to below 400 ng/dL as stated would be clinically catastrophic at a population level. That is not what the data shows.
Sperm count decline is better supported. Levine et al. (2017, Human Reproduction Update) found a 52-59% decline in sperm concentration among men in Western countries from 1973 to 2011. That figure is real, though the causes are debated.
What did they get wrong (or right)?
Let's be direct about the errors. The soy claim is flatly wrong. The video states that "one tablespoon of soybean oil contains more estrogen than a birth control pill." This is not true. Soybean oil contains almost no phytoestrogens. Soy foods contain isoflavones, which are weak phytoestrogens, but the clinical evidence that moderate soy consumption suppresses testosterone in men is not convincing. Hamilton-Reeves et al. (2010, Fertility and Sterility) reviewed 15 placebo-controlled studies and found no significant effect of soy protein on testosterone levels in men.
The PFAS and phthalate links to testosterone disruption are more defensible. Exposure to phthalates has been associated with lower testosterone in epidemiological studies (Meeker et al., 2009, Environmental Health Perspectives). PFAS exposure has shown associations with altered reproductive hormones in men (Joensen et al., 2009, Environmental Health Perspectives). These are associations, not proven causes, and the video presents them as certainties.
The suggestion that gender identity is caused by endocrine disruptors is speculation dressed up as science. There is no credible research supporting this, and the framing is harmful.
The supplement detox promotion at the end is a red flag. There is no peer-reviewed evidence that supplements can meaningfully remove PFAS or phthalates from the body.
What should you actually know?
Testosterone decline at a population level is a real and studied phenomenon, but the scale is being exaggerated here to generate alarm. A 15-20% decline over several decades is worth investigating. A 50% collapse would be an extinction-level health event, and we are not seeing that in clinical practice or population data.
Endocrine-disrupting chemicals are a legitimate area of research concern. Reducing unnecessary plastic use and filtering drinking water are reasonable, low-risk lifestyle choices supported by precautionary logic even if causation is not fully established. But these lifestyle changes are not treatments for hypogonadism. If a man has symptoms of low testosterone, such as fatigue, low libido, reduced muscle mass, or mood changes, the right step is getting a morning serum testosterone test through a licensed clinician, not buying supplements from a creator's affiliate link.
TRT, when appropriately prescribed for diagnosed hypogonadism, is an evidence-based treatment. Self-diagnosing from social media and self-treating with unregulated supplements is not equivalent and carries real risks.
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This page currently connects to 12 source-backed evidence items through visible references or structured citation data.
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Testosterone therapy in men with androgen deficiency syndromes: an Endocrine Society clinical practice guideline
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Population-level testosterone decline is documented in peer-reviewed literature but is more modest than the 50% figure cited, with studies like Travison et al.
FormBlends verdict
Population-level testosterone decline is documented in peer-reviewed literature but is more modest than the 50% figure cited, with studies like Travison et al. (2007) estimating roughly 15-20% over three decades, likely driven by rising obesity rates, sedentary behavior, and possibly environmental chemical exposure. Men experiencing symptoms consistent with hypogonadism, including fatigue, low libido, or mood disruption, should pursue a clinical evaluation including morning serum total testosterone measurement rather than relying on supplement-based interventions promoted on social media. TRT is an FDA-regulated treatment for diagnosed hypogonadism and requires proper clinical assessment, not a detox protocol.
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What it helps with
- Population-level testosterone decline is documented in peer-reviewed literature but is more modest than the 50% figure cited, with studies like Travison et al. (2007) estimating roughly 15-20% over three decades, likely driven by rising obesity rates, sedentary behavior, and possibly environmental chemical exposure. Men experiencing symptoms consistent with hypogonadism, including fatigue, low libido, or mood disruption, should pursue a clinical evaluation including morning serum total testosterone measurement rather than relying on supplement-based interventions promoted on social media. TRT is an FDA-regulated treatment for diagnosed hypogonadism and requires proper clinical assessment, not a detox protocol.
- Travison et al. (2007, JCEM) found roughly a 15-20% testosterone decline over three decades in U.S. men, not the 50% drop claimed in this video.
- Levine et al. (2017, Human Reproduction Update) confirmed approximately 52-59% decline in sperm concentration in Western men since 1973, making the sperm count claim the most accurate data point in the video.
What it may miss
- It may not cover eligibility, contraindications, medication interactions, lab history, or dose escalation.
- Compound access, legal status, and product quality still need a separate safety check.
- Social video captions rarely show the full evidence base behind a claim.
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Compare the claim against a FormBlends guide, safety page, and licensed-provider review before acting.
Start provider reviewWhat You'll Learn
- Travison et al. (2007, JCEM) found roughly a 15-20% testosterone decline over three decades in U.S. men, not the 50% drop claimed in this video.
- Levine et al. (2017, Human Reproduction Update) confirmed approximately 52-59% decline in sperm concentration in Western men since 1973, making the sperm count claim the most accurate data point in the video.
- Hamilton-Reeves et al. (2010, Fertility and Sterility) reviewed 15 placebo-controlled studies and found soy consumption did not significantly reduce testosterone in men, directly contradicting the soy claims made here.
- PFAS and phthalate associations with hormone disruption are a real area of research, but current evidence is associational, not proof of causation at the levels of everyday consumer exposure.
- No peer-reviewed supplement protocol has been shown to remove PFAS or phthalates from the human body. The supplement promotion at the end of this video is not supported by the science cited in the video itself.
- Men with genuine low testosterone symptoms should seek a morning serum testosterone blood test through a licensed clinician. Normal reference ranges are typically 300-1000 ng/dL, and diagnosis requires clinical evaluation, not a social media checklist.
- Obesity, sedentary behavior, and poor sleep are the most consistently documented modifiable drivers of lower testosterone in population studies, and addressing these factors has stronger evidence than any detox protocol.
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About the Creator
Deborah Murtagh · Instagram creator
41.5K views on this video
Men Are Not the Same as Their Fathers… Here’s Why! 🚨 📉 Testosterone levels have dropped by OVER 50% in the past 50 years. 💀 Sperm counts have fallen by 60%. 🚨 1 in 4 men now have low testostero
Sources & references
- [1]Travison et al. (2007)
- [2]Lokeshwar et al. (2021)
- [3]Levine et al. (2017)
- [4]Hamilton-Reeves et al. (2010)
- [5]Meeker et al., 2009
- [6]Joensen et al., 2009
Citations extracted from our medical team's review. Click any citation to search PubMed.
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Not medical advice. This video was made by Deborah Murtagh, not by FormBlends. Our write-up above is an editorial review, not a medical recommendation. Talk to your doctor before making any decisions about medications or treatments.