Vitamin A (Beta-Carotene)

Plant-derived precursor to vitamin A that converts to retinol as needed, with no toxicity risk

Scientific nameBeta-Carotene FormulaC40H56 Molecular weight536.87 g/mol CAS7235-40-7

30 absorption score

10 safety / 10

12 USD per month

6 documented interactions

Check it against something

Evidence level A

Vitamin A (Beta-Carotene) with:

94 out of 100

Works better together Compatible. Timing differs, so follow each supplement's own window.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Safe vitamin A provision

Converts to vitamin A only as needed by the body

Self-regulating conversion prevents toxicity Evidence A-grade 4-8 weeks

Powerful antioxidant protection

Neutralizes free radicals and singlet oxygen

Direct free radical scavenging in lipid membranes Evidence A-grade 2-4 weeks

Eye health support

Supports vision and prevents macular degeneration

Accumulates in retina and provides antioxidant protection Evidence A-grade 8-12 weeks

Skin health enhancement

Protects skin from UV damage and premature aging

Antioxidant protection in skin tissues Evidence B-grade 6-10 weeks

Immune system support

Enhances immune function without toxicity concerns

Converted to retinol for immune cell function Evidence A-grade 4-8 weeks

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Turmeric Anti-inflammatory & antioxidant 300-1000mg A 3% Glutathione Master antioxidant & detox support 250-750mg B 20% Astaxanthin Superior antioxidant & skin protection 4-12mg B 20% SAM-e Mood support & liver health 400-800mg A 70% Plant Collagen Vegan collagen support & antioxidants 2-5g C 70% Quercetin Immune support & allergy relief 500-1000mg B 5%

Every pair we checked

12 combinations scored by the engine

Vitamin A (Beta-Carotene) + Caffeine No documented interaction either way No known interaction 70

Vitamin A (Beta-Carotene) + Creatine Monohydrate No documented interaction either way No known interaction 70

Vitamin A (Beta-Carotene) + Whey Protein No documented interaction either way No known interaction 70

Vitamin A (Beta-Carotene) + Turmeric No documented interaction either way No known interaction 70

Vitamin A (Beta-Carotene) + Lactase Improved calcium absorption when consuming dairy Works better together 82

Vitamin A (Beta-Carotene) + Bovine Collagen Essential for collagen synthesis and cross-linking Works better together 82

Vitamin A (Beta-Carotene) + DHA Prevents oxidation of DHA and enhances stability Works better together 82

Vitamin A (Beta-Carotene) + Magnesium Oxide Magnesium required for vitamin D metabolism Works better together 82

Vitamin A (Beta-Carotene) + Vitamin D3 Protects beta-carotene from oxidation Works better together 90

Vitamin A (Beta-Carotene) + Fish Oil (EPA/DHA) Protects fish oil from oxidation Works better together 90

Vitamin A (Beta-Carotene) + Calcium Carbonate Essential for calcium absorption and utilization Works better together 94

Vitamin A (Beta-Carotene) + Zinc Gluconate Required for beta-carotene conversion to vitamin A Works better together 99

Dosage

With fat meal

Daily15,000-25,000 IU

Maintenance10,000-15,000 IU

Therapeutic15,000-25,000 IU

MaximumNo established upper limit

Conversion ratio6-12 IU beta-carotene = 1 IU vitamin A

Upper limit 3000 mcg RAE NIH ODS

Before you take it

Pregnancyavoid high doses — teratogenic

VeganYes

When to expect it

First Effects2-4 weeks for antioxidant benefits

Peak Benefits8-12 weeks for eye health and immune benefits

Deficiency Development6-12 months with no vitamin A intake

Toxicity OnsetNo toxicity, only harmless skin discoloration

How to measure it

$40-80

MarkerSerum beta-carotene

Optimal0.3-2.0 mg/L

Deficient below0.1 mg/L

FrequencyRarely needed unless monitoring carotenemia

What people actually reported to the FDA

CAERS, 34 reports naming it as the suspect

Most reported effects

Dizziness 5

Headache 4

Vomiting 4

Abdominal pain 4

Nausea 3

Named as the suspect 34 reports of 187 that mention it at all

Serious outcome 78% hospitalisation, emergency room or worse

Other Serious or Important Medical Event29

Visited a Health Care Provider10

Hospitalization8

Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →

Works better with

3 documented

Vitamin E

Protects beta-carotene from oxidation

Antioxidant protection during absorption and storage · level A

Dietary Fat

Dramatically improves beta-carotene absorption

Required for carotenoid micelle formation · level A

Zinc

Required for beta-carotene conversion to vitamin A

Cofactor for conversion enzymes · level B

What not to take with Vitamin A (Beta-Carotene)

3 documented

Alcohol Chronic

Impairs beta-carotene conversion to vitamin A

Interferes with conversion enzymes · moderate significance

Olestra Fat Substitute

Reduces beta-carotene absorption

Interferes with fat-soluble vitamin absorption · moderate significance

Mineral Oil

Reduces beta-carotene absorption

Non-absorbable fat interferes with carotenoid uptake · moderate significance

Medication interactions

Discuss these with a pharmacist before combining

cholesterol-lowering-drugs Minor

May reduce beta-carotene absorption

What to do: Space doses apart or increase beta-carotene intake

orlistat-weight-loss Moderate

Significantly reduces beta-carotene absorption

What to do: Take beta-carotene at different time or increase dose

Available forms

bioavailability compared

Natural Beta-Carotene 30

Synthetic Beta-Carotene 25

Natural Beta-Carotene: No toxicity risk, Natural form, Antioxidant benefits, Self-regulating

Synthetic Beta-Carotene: Less expensive, Standardized potency, Stable

Food sources

before you supplement

Sweet potato 14,187 IU/100g · 25

Carrots 16,706 IU/100g · 20

Spinach 5,626 IU/100g · 15

Cantaloupe 3,382 IU/100g · 30

Red bell pepper 3,131 IU/100g · 25

Too little

deficiency signs

Same as vitamin A deficiency (if conversion is adequate):
Night blindness and poor vision
Dry skin and eyes
Frequent infections
Poor wound healing
Growth retardation in children

Too much

toxicity signs

No true toxicity symptoms
Carotenemia: harmless yellow-orange skin
Reversible skin discoloration
No organ damage or serious effects
Skin color returns to normal when intake reduced

Who benefits most

vitamin-a-toxicity-concerns

Cannot cause vitamin A toxicity unlike preformed vitamin A

15,000-25,000 IU daily

pregnant-women

Safe vitamin A option during pregnancy

10,000-15,000 IU daily

eye-health-focused

Accumulates in retina for macular protection

15,000-25,000 IU daily

sun-exposed-individuals

Provides internal sun protection and skin benefits

15,000-25,000 IU daily

vegans-vegetarians

Plant-based source of vitamin A activity

15,000-25,000 IU daily

Where to buy it

compare forms first

Look for Vitamin A (Beta-Carotene) at 15,000-25,000 IU per serving. The form that matters here is Natural Beta-Carotene.

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What else affects it

Beyond other supplements

Dietary fat

Dramatically improves beta-carotene absorption

Required for carotenoid micelle formation

Alcohol chronic

Impairs beta-carotene conversion to vitamin A

Interferes with conversion enzymes

How it works

Converted to retinol by beta-carotene 15,15'-oxygenase
Direct antioxidant activity independent of vitamin A conversion
Accumulates in skin and retina for protection
Quenches singlet oxygen and lipid peroxyl radicals
Self-regulating conversion prevents vitamin A excess
Modulates immune function through antioxidant pathways

Key findings

what the evidence supports

No vitamin A toxicity risk regardless of dose (established)
May increase lung cancer risk in heavy smokers (ATBC study 1994)
Protective against macular degeneration (AREDS study 2001)
Poor conversion efficiency in many individuals (AJCN 2010)

Sources: NIH Examine.com · data reviewed 2026-08-02

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Vitamin A (Beta-Carotene)?

Documented effects: Safe vitamin A provision; Powerful antioxidant protection; Eye health support; Skin health enhancement. Converts to vitamin A only as needed by the body

How much Vitamin A (Beta-Carotene) should you take per day?

The common daily range is 15,000-25,000 IU. By goal — maintenance: 10,000-15,000 IU; therapeutic: 15,000-25,000 IU; maximum: No established upper limit; conversion ratio: 6-12 IU beta-carotene = 1 IU vitamin A.

When is the best time to take Vitamin A (Beta-Carotene)?

With fat meal. First effects are typically reported within 2-4 weeks for antioxidant benefits.

What are the side effects of Vitamin A (Beta-Carotene)?

At excessive doses: No true toxicity symptoms, Carotenemia: harmless yellow-orange skin, Reversible skin discoloration, No organ damage or serious effects, Skin color returns to normal when intake reduced. Safety rating at normal doses is 10 out of 10.

What should you not take with Vitamin A (Beta-Carotene)?

Separate it from Alcohol Chronic, Olestra Fat Substitute, Mineral Oil by two to four hours. Impairs beta-carotene conversion to vitamin A

Does Vitamin A (Beta-Carotene) interact with medications?

Documented interactions with cholesterol-lowering-drugs, orlistat-weight-loss. Discuss these with a pharmacist before combining.

How much Vitamin A (Beta-Carotene) is too much?

The tolerable upper intake level is 3000 mcg RAE per day for adults, per NIH ODS. Above that, the risk of adverse effects rises: No true toxicity symptoms, Carotenemia: harmless yellow-orange skin, Reversible skin discoloration.

How do you know if you need Vitamin A (Beta-Carotene)?

The marker is Serum beta-carotene, optimal range 0.3-2.0 mg/L. Common deficiency signs: Same as vitamin A deficiency (if conversion is adequate):, Night blindness and poor vision, Dry skin and eyes, Frequent infections.

Taken for

49 Liver & Detox

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