Metal Mixtures Raise Blood Pressure During Pregnancy
NonToxCo Research
Science & Safety Team · 4/7/2026
Mixed metal exposure during pregnancy is driving up blood pressure. And the metals doing the damage aren't the ones you'd expect.
Metals and Pregnancy Hypertension
A 2026 case-control study in J Environ Sci from northwestern China found that both individual and combined metal exposure during pregnancy was linked to increased risk of hypertensive disorders of pregnancy (HDP).
Rubidium was the strongest contributor to the mixture effect. And the interaction between high thallium and low cobalt significantly increased HDP risk.
Why These Metals Matter
Rubidium and thallium are trace metals that get far less attention than lead or mercury. But they're present in soil, water, and food. Rubidium substitutes for potassium in the body and can disrupt electrolyte balance. Thallium is toxic at very low doses and accumulates in multiple organs.
The combination of high thallium and low cobalt creates a synergistic risk. One metal doing damage while another's protective effects are absent.
Why Pregnancy Hypertension Is Dangerous
HDP can lead to preeclampsia, premature birth, organ damage, and maternal death. It's one of the leading causes of pregnancy complications worldwide.
What Expecting Mothers Can Do
Test your drinking water, especially if you live in a rural or mining area. Eat a balanced diet to maintain healthy mineral levels. And choose non-toxic baby products to reduce overall chemical exposure during pregnancy.
Also see glass food storage for safer alternatives.