Do Vaccines Affect Menstrual Cycle? Here’s What the Science Says
NIH-Funded Study Finds Small, Temporary Menstrual Changes After COVID Vaccination
A peer-reviewed study published in Obstetrics & Gynecology (Jan 2022) analyzed nearly 4,000 women aged 18–45 to understand how COVID-19 vaccines affect the menstrual cycle.
Funded by the NIH, the study used data from the Natural Cycles app, a fertility tracking tool. It compared 2,403 vaccinated participants with 1,556 unvaccinated controls.
Key Results:
After vaccination, cycle length increased slightly:
+0.71 days after the 1st dose
+0.91 days after the 2nd dose
No change in bleeding duration (menses length)
Women who received both doses in one cycle had a larger delay (~2.38 days)
Cycle timing returned to normal within 1–2 cycles
How Spike Detox™ Supports Recovery From Immune-Linked Stressors
While the study confirms that vaccine-related menstrual changes are minor and temporary, it also highlights how immune stress and inflammation can subtly affect sensitive body systems — like hormonal balance, circulation, and recovery timing.
That’s where Spike Detox™ fits in.
Formulated to help the body clear lingering spike protein fragments and support systemic recovery, it includes ingredients known to support:
Balanced inflammation response
Hormonal and immune stability
Natural detoxification pathways
What’s Inside Spike Detox™:
Nattokinase – Supports the breakdown of fibrin and protein-based clots to help restore healthy blood flow and tackle spike residue
Curcumin – A potent antioxidant that fights inflammation and oxidative stress, protecting your heart and vesselsor antioxidant and anti-inflammatory action
Bromelain – Modulates the immune system, helping to calm the low-level immune overdrive seen in long-COVID
Black Pepper – Enhances absorption so your body can fully utilize all the above nutrients
Spike Detox™ is the first trademarked supplement created specifically for spike protein detox.
Backed by research.
Designed for long-term support.
Trusted by thousands.
