Nootropic profile
Vitamin C
Vitamin C (ascorbic acid) is an essential water-soluble vitamin and powerful antioxidant that supports cognitive function, neurotransmitter synthesis, and stress response. It plays a vital role in brain health through neuroprotection, dopamine production, and reduction of oxidative stress.
Educational only: this is not medical advice. Always check with a qualified healthcare professional before starting any supplement.
What is Vitamin C?
Vitamin C, also known as ascorbic acid, is one of the most well-researched vitamins with profound effects on brain function and mental performance.
What it does for you
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How to take it
- General Cognitive Support: 75–90 mg/day (RDA threshold) from food sources or supplements provides baseline cognitive benefits for most adults.
- Enhanced Cognitive Performance: 200–500 mg/day appears to be the optimal range, with research showing no additional cognitive benefits beyond 500 mg/day.
- Stress Reduction: 1,000–3,000 mg/day in divided doses (particularly sustained-release formulations) for acute stress management and cortisol reduction.
- Maximum Safe Dose: Up to 2,000 mg/day is considered safe for most adults; doses above 3,000 mg/day may cause gastrointestinal discomfort.
Watch out for
- Common Side Effects: Doses above 3,000 mg/day may cause stomach cramps, gastric reflux, diarrhoea, and gastrointestinal discomfort in some individuals.
- Kidney Concerns: Long-term megadoses may increase risk of kidney stones in susceptible individuals; those with kidney disease should consult a healthcare...
- Iron Absorption: High-dose vitamin C can increase iron absorption, which may be problematic for individuals with haemochromatosis or iron overload conditions.
- Pregnancy: Recommended intake is 85 mg/day for pregnant women aged 19+, with an upper limit of 2,000 mg/day. Megadoses during pregnancy may cause rebound...
- Drug Interactions: May interact with certain chemotherapy drugs, statins, and blood thinners; consult a healthcare provider if taking medications.
The science, if you're curious.
- Serves as an essential cofactor in the conversion of dopamine to norepinephrine and stimulates acetylcholine production, supporting attention, motivation,...
- Acts as the brain's primary water-soluble antioxidant, neutralising free radicals, reducing oxidative stress, and preserving neuronal integrity and synaptic...
- Reduces cortisol levels during acute and chronic stress, supporting healthy stress response and protecting against stress-induced cognitive decline.
- Functions beyond antioxidant activity as an endogenous neuromodulator, regulating neurotransmitter systems including dopaminergic, cholinergic, and...
Where to find it
- Citrus Fruits: Oranges, lemons, grapefruits, and limes are classic high-vitamin C sources.
- Berries: Strawberries, blackcurrants, and acerola cherries (one of the richest natural sources).
- Vegetables: Bell peppers (especially red), broccoli, Brussels sprouts, kale, and tomatoes.
- Tropical Fruits: Kiwi fruit, papaya, mango, and pineapple.
- Supplement Forms: Ascorbic acid (most common), sodium ascorbate, calcium ascorbate, liposomal vitamin C, Ester-C (calcium ascorbate with metabolites), and mineral ascorbates.
Frequently asked
Vitamin C (ascorbic acid) is an essential water-soluble vitamin and powerful antioxidant that supports cognitive function, neurotransmitter synthesis, and stress response. It plays a vital role in brain health through neuroprotection, dopamine production, and reduction of oxidative stress.
The main benefits people report from Vitamin C are: Cognitive Enhancement, Energy, Focus, Memory, Mood, Stress Relief.
General Cognitive Support: 75–90 mg/day (RDA threshold) from food sources or supplements provides baseline cognitive benefits for most adults.Enhanced Cognitive Performance: 200–500 mg/day appears to be the optimal range, with research showing no additional cognitive benefits beyond 500 mg/day.Stres...
Common Side Effects: Doses above 3,000 mg/day may cause stomach cramps, gastric reflux, diarrhoea, and gastrointestinal discomfort in some individuals.Kidney Concerns: Long-term megadoses may increase risk of kidney stones in susceptible individuals; those with kidney disease should consult a health...
Serves as an essential cofactor in the conversion of dopamine to norepinephrine and stimulates acetylcholine production, supporting attention, motivation,...Acts as the brain's primary water-soluble antioxidant, neutralising free radicals, reducing oxidative stress, and preserving neuronal inte...
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