Do Salt Lamps Work?

Are negative ions good for you? This question led to discovering hundreds of peer-reviewed scientific studies on the biological effects of ions spanning nearly a century.

Studies begin with the assumption that positive ions make us feel bad and negative ions make us feel good.

Himalayan salt lamps are marketed as releasing negative ions through heat from a light bulb, which supposedly helps produce serotonin and makes you feel good.

The video aims to investigate whether the claims about negative ions and salt lamps are supported by scientific evidence.

Despite opposite charges attracting, several natural processes continuously generate atmospheric ions that prevent them from neutralizing.

• Cosmic rays create around 500 ions per cubic centimeter at ground level, the most significant source over oceans • Natural radioactivity from uranium and thorium decay contributes hundreds to thousands of ions per cubic centimeter on land • Lightning strikes generate copious amounts of ions during thunderstorms • Waterfalls and ocean waves create tens of thousands of ions per cubic centimeter through water droplet collisions

Interiors of houses and businesses have lower ion concentrations around 100-200 ions per cubic centimeter because structures shield from cosmic rays and radioactivity, and charged ions get trapped in air ducts.

Ion concentrations are lower in polluted areas because ions cling to pollutants and aerosols, making them less likely to remain in the atmosphere.

• High-density negative ions produced antidepressant effects in seasonal affective disorder patients, matching bright light therapy results • Participants in high-density negative ion environments had faster reaction times and reported being more energetic • EEG experiments showed slower alpha wave frequency with higher amplitude and increased reported relaxation and alertness • Workers exposed to negative ions in office settings reported 50% fewer headaches and increased alertness

High concentrations of positive ions increased anxiety and excitement significantly while also increasing serum serotonin levels.

• Many studies had methodological problems with participants not properly blinded to treatment • Small sample sizes were common across studies • Studies surveyed multiple measures increasing likelihood of random significant results • Ion levels were measured at source without tight control of distance to subjects

A 2013 meta-analysis found no consistent influence of positive or negative air ionization on anxiety, mood, relaxation, sleep, and comfort, with only a weak link to lower depression scores.

Using mass spectrometry at atmospheric pressure to detect ions coming from the salt lamp.

The salt lamp produced no detectable negative ions despite being heated for an hour.

Water molecules landing on salt surfaces are meant to liberate chloride ions, but the energy required to do this is way too high, so it simply doesn't happen according to chemists.

Salt doesn't have the right crystal structure for ion production, unlike tourmaline gemstone which develops electric charges when heated and costs many thousands of dollars.

Ionic air purifiers successfully produce negative ions using high voltage to ionize air and accelerate ions, producing a detectable breeze without moving parts.

Mass spectrometry confirmed negative ions were being generated from the ionic breeze purifier.

Generating ions produces ozone as an unfortunate byproduct, rising from 17 parts per billion to over 80 parts per billion at smog alert levels.

While the device creates negative ions, it simultaneously creates unhealthy ozone levels that defeat the purpose of air purification.

A cubic centimeter of air contains 10 to the 19 air molecules, making even tens of thousands of ions insignificant at parts per million billion levels with no clear biological mechanism.

Humans constantly build up charge on skin and discharge it through small zaps when touching objects, so a few extra stray electrons would likely have minimal impact.

If ions have any effect, it would likely be indirect by removing pollutants and odors as ions cling to chemicals and get attracted to surfaces.

Taking a walk outside, particularly near waterfalls or oceans, provides proven mental and physical health benefits through exercise and fresh air rather than ion exposure.