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Lithium ascorbate, an organic lithium salt supplement, causes greater antidepressant and anti-stress effects compared to lithium carbonate in mouse experiments.
Vocabulary
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Lithium ascorbate – organic lithium supplement made from lithium and ascorbic acid.
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Ascorbic acid – vitamin C.
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Lithium carbonate – inorganic lithium salt used as a prescription medication in psychiatry.
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Adrenaline –is a hormone and neurotransmitter that influences the "fight-or-flight" response. It increases heart rate, blood pressure, and energy supplies during stressful or exciting situations.
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Norepinephrine – is an organic chemical that acts as both a stress hormone and a neurotransmitter that increases alertness, elevates heart rate, and constricts blood vessels.
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Eosinophils – are a type of white blood cell produced in the bone marrow that act as the body's first immune responders.
What Substances Were Tested?
The study compared:
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Ascorbic acid.
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Lithium ascorbate.
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Lithium carbonate.
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Combinations of lithium carbonate and ascorbic acid.
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A control treatment without the active test substances.
How Was the Experiment Done?
The study included 72 mice. The animals received the test substances by mouth once a day for 14 days.
The researchers evaluated the mice using two methods:
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The tail suspension test.
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A simulated transport stress test.
What Is the Tail Suspension Test?
In the tail suspension test, each mouse was suspended by its tail for six minutes. The session was recorded, and an observer measured how long the mouse remained still and how long it continued to move:
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More active movement is commonly interpreted as an antidepressant-like response.
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Longer periods of immobility are interpreted as suppressed behavior.
By Day 7, the lithium ascorbate group had:
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27% less immobility than the control group.
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82.5% more active movement than the control group.
By Day 14, the lithium ascorbate group had:
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31% less immobility than the control group.
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About twice as much active movement as the control group.
The researchers described this as an antidepressant-like effect that became stronger with longer administration.
What Is Simulated Transport Stress?
Transport can expose animals to vibration, noise, movement, and an inability to find a stable position. To imitate part of this experience, the researchers placed cages containing freely moving mice on an orbital shaker.
The cages were shaken for 24 minutes at 120 rotations per minute. Afterward, blood samples were collected.
The researchers measured:
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Adrenaline.
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Norepinephrine.
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Eosinophils.
Adrenaline and norepinephrine increase alertness, heart rate, and energy availability. The number of eosinophils indicates how severe the stress response was.
On Day 7, mice receiving lithium ascorbate had:
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56.5% lower adrenaline levels.
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46.5% lower norepinephrine levels.
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Nearly twice as many eosinophils as the control mice.
On Day 14, they had:
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64.8% lower adrenaline levels.
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53.5% lower norepinephrine levels.
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More than twice as many eosinophils as the control mice.
The researchers interpreted these changes as signs of a reduced physiological stress response.
What Was the Effect of Lithium Carbonate and Ascorbic Acid?
Lithium carbonate did not produce a significant antidepressant-like effect in the tail suspension test or reduce adrenaline or norepinephrine levels after simulated transport stress.
Ascorbic acid alone did not produce a significant effect either.
Combining lithium carbonate with ascorbic acid did not produce results comparable to lithium ascorbate.
What Do the Results Mean?
In this mouse study, lithium ascorbate was associated with a greater antidepressant-like effect and a reduced physiological stress response compared to lithium carbonate and control. The effect became stronger with longer administration.
The findings suggest that the chemical form of lithium may influence how it acts in an animal model. However, this was a preclinical study in mice. The results do not show that lithium ascorbate treats depression, anxiety, or stress in humans.
Further research is needed to confirm the findings, clarify the mechanisms involved, and determine whether similar effects occur in people.