Consuming Semen: Safety, Nutrition, and Myths

Ingesting one's own semen (autospermatophagia) or a partner's is generally physically safe but offers no nutritional benefit and carries potential risks.

Composition

Semen is ~1–5% sperm; 95–99% seminal plasma (water, fructose, proteins, enzymes, prostaglandins, zinc, citrate, calcium, magnesium, urea, lactic acid). Volume: 1.5–5 mL. Calories: ~5–25 per ejaculate. Protein: ~0.1–0.5 g. Nutritionally negligible.

Potential Risks

• STI Transmission: If partner has HIV, gonorrhea, chlamydia, syphilis, herpes, HPV, hepatitis B/C. Oral exposure can transmit (especially gonorrhea, syphilis, herpes, HPV).
• Allergic Reaction: Human seminal plasma hypersensitivity (rare). Local (burning, swelling) or systemic (anaphylaxis).
• GI Upset: Prostaglandins, texture, volume may cause nausea.
• Microbiome: May alter oral/gut flora transiently.

Auto-consumption (Own Semen)

• No STI risk (autoinoculation of own pathogens already present).
• No nutritional value.
• Psychological/cultural factors vary.

Conclusion

Not a meaningful nutrient source. Safe sex practices (condoms, PrEP, vaccination, testing) prevent STIs. If allergic symptoms occur, avoid exposure and consult allergist. No medical indication for consumption.