Placenta Capsules: What the Research Says About Claimed Benefits
Placenta capsules — typically made from a dehydrated, ground human placenta encapsulated for postpartum consumption — have gained attention in wellness circles over the past two decades. The practice, known as placentophagy, is often marketed around a range of postpartum benefits. But what does the science actually show? The honest answer is: considerably less than many claims suggest.
What Are Placenta Capsules?
The human placenta is the organ that develops during pregnancy to support fetal growth, delivering oxygen and nutrients while removing waste. After birth, some people choose to have their placenta processed — typically steamed, dehydrated, and ground into powder — and encapsulated for consumption in the days and weeks following delivery.
This practice is distinct from placenta consumption in other mammals, which is near-universal and likely driven by evolutionary factors including nutritional recovery and predator avoidance. Human placentophagy has far older cultural roots in some traditions, though it has never been a mainstream or medically recommended practice in most parts of the world.
What Nutrients Does the Placenta Contain?
The placenta is a biologically active organ. Laboratory analyses have confirmed it contains:
- Iron — including both heme and non-heme forms
- Protein and amino acids
- Hormones — including estrogen, progesterone, and oxytocin, though in variable amounts
- B vitamins, including B12
- Zinc and other trace minerals
- Lipids and fatty acids
| Component | Present in Raw Placenta | Survives Processing? |
|---|---|---|
| Iron | Yes | Partially — depends on method |
| Hormones (estrogen, progesterone) | Yes | Small amounts detected post-encapsulation |
| Vitamin B12 | Yes | Uncertain after heating/dehydration |
| Oxytocin | Yes | Likely degraded orally |
| Zinc | Yes | Generally stable |
The key issue is that processing significantly alters nutrient and hormone content. Steaming and dehydration degrade heat-sensitive compounds, and hormones like oxytocin are largely broken down in the digestive tract before reaching systemic circulation.
What Does the Research Actually Show?
This is where the evidence base becomes notably thin. 🔬
The most rigorous review to date — a 2018 systematic review published in Archives of Women's Mental Health — examined existing studies on human placentophagy and concluded that there is currently no scientific evidence that consuming placenta capsules provides the benefits commonly claimed, including:
- Reduced postpartum depression symptoms
- Faster postpartum recovery
- Increased milk supply (galactagogue effect)
- Hormonal stabilization
- Replenishment of iron lost during delivery
Most available studies are small, observational, or rely on self-reported outcomes. A small randomized controlled trial from the University of Nevada, Las Vegas (2018) found that participants consuming placenta capsules showed no significant difference in iron levels, mood, fatigue, or bonding compared to those taking a placebo.
The hormone content detected in encapsulated placenta has been measured — and while trace amounts of estrogen and progesterone are present, researchers note these levels are likely too low to produce meaningful physiological effects in most postpartum individuals.
What Variables Would Shape Any Potential Effect?
Even if future research finds more conclusive benefits, individual outcomes would depend heavily on several factors:
- Baseline iron status — Someone with significant iron-deficiency anemia postpartum may have different needs than someone with adequate iron stores
- Processing method — Raw, steamed, or dehydrated preparations differ in nutrient retention
- Dosage and capsule quantity — Most commercial preparations are not standardized
- Individual gut microbiome and absorption capacity — These affect how well any nutrient from any food source is actually used
- Hormonal baseline — Postpartum hormonal shifts vary considerably person to person
- Overall diet quality — A nutrient-dense postpartum diet provides context that dramatically influences whether any single food source makes a measurable difference
Are There Any Known Risks?
Safety concerns are not hypothetical. The CDC issued a health advisory in 2017 after a newborn developed recurrent Group B Streptococcus (GBS) infection linked to placenta capsules consumed by the mother while breastfeeding. Because processing temperatures in home or commercial encapsulation may not be sufficient to eliminate all pathogens, the risk of bacterial contamination is real.
Additional concerns include:
- Contaminants — The placenta filters toxins during pregnancy; some environmental toxins may concentrate in placental tissue
- Unregulated processing — No standardized safety protocols govern placenta encapsulation services
- Hormone exposure through breast milk — Trace hormones in capsules could theoretically transfer to a nursing infant, though this has not been well-studied
Where Does This Leave the Claimed Benefits?
The gap between popular claims and available evidence is significant. Many of the attributed benefits — mood stabilization, energy recovery, milk production support — are plausible in theory given the placenta's nutrient and hormone content. But plausibility is not the same as demonstrated effect, and the studies needed to establish that effect have not yet been conducted at the scale or rigor required.
This is an area where the strength of the evidence does not currently match the strength of the claims being made in wellness spaces.
Whether placenta capsules represent a meaningful nutritional strategy — or simply a costly and potentially risky postpartum trend — depends on factors that vary from person to person: individual nutrient status, overall diet, health history, and what someone is specifically hoping to address in the postpartum period. Those are questions the existing research cannot answer on anyone's behalf.