Heidelberger Chlorella Buffered Vitamin C as Ester-C®
110 capsules · 1 capsule per day
Product description
This supplement provides 395 mg of vitamin C from Ester-C® and is therefore more moderately dosed than many 500–1,000 mg products. The product character lies in the buffered Ester-C® form and clear single-ingredient structure. From an orthomolecular perspective, such a dose is more suitable for regular supplementation than for a pronounced high-dose strategy.
Vitamin C
395 mg per dayAssessment by Oliver Fröhner
Micronutrient expert & Food Coach
Product character
This supplement provides 395 mg of vitamin C from Ester-C® and is therefore more moderately dosed than many 500–1,000 mg products. The product character lies in the buffered Ester-C® form and clear single-ingredient structure. From an orthomolecular perspective, such a dose is more suitable for regular supplementation than for a pronounced high-dose strategy. Other vitamin C sources should still be included in total intake.
Formula & transparency
- Ingredients list fully checked
- Without microcrystalline cellulose according to the fully reviewed ingredient list
- Without silicon dioxide according to the fully reviewed ingredient list
- Product data reviewed within the freshness period
Data basis
- Quality/laboratory status is based on manufacturer information
- HPMC/hydroxypropyl methylcellulose is declared.
Summary by Oliver Fröhner
This supplement provides 395 mg of vitamin C from Ester-C® and is therefore more moderately dosed than many 500–1,000 mg products. The product character lies in the buffered Ester-C® form and clear single-ingredient structure. From an orthomolecular perspective, such a dose is more suitable for regular supplementation than for a pronounced high-dose strategy.
Manufacturer information and Oliver Fröhner’s editorial assessment are presented separately. Data checked: 21 Sep 2026.
Active ingredients & NRV
Active ingredients
Ingredients & additives
Calciumascorbat/-threonat (Ester-C®), Hydroxypropylmethylcellulose (Kapselhülle).
Directions & package
Take 1 capsule daily.
110 capsules · 110 days
Quality, lab & sources
Lab status: Manufacturer information
500 mg Ester-C® (calcium ascorbate/-threonate) provides 395 mg vitamin C; vegan according to the manufacturer.
Product data checked on 21 Sep 2026.
Nutrient knowledge & reference values
Nutrient knowledge & reference values
General nutrient information for interpreting the product dosage. Signs of insufficient or excessive intake are non-specific and do not replace a diagnosis.
Vitamin C
Vitamin C (ascorbic acid) is an essential water-soluble vitamin. presents physiological functions, the EU NRV, safety assessment and product-specific dosage separately.
Functions
EU-authorised health-claim functions include, among other things: vitamin C contributes to normal collagen formation for the normal function of blood vessels, bones, cartilage, gums, skin and teeth. It contributes to normal energy-yielding metabolism, normal functioning of the nervous system and immune system, and the protection of cells from oxidative stress. Vitamin C also contributes to the reduction of tiredness and fatigue and increases iron absorption.
Possible signs of insufficient intake
Severe vitamin C deficiency can lead to scurvy. Reported signs include fatigue, inflammation of the gums, pinpoint bleeding, increased capillary fragility and delayed wound healing. Such symptoms are not suitable for self-diagnosis.
Points to consider at high intake
EFSA was unable to derive a UL for vitamin C because of insufficient data. High additional intake can mainly cause gastrointestinal symptoms such as diarrhoea, nausea, bloating or abdominal cramps. With very high amounts, individual risk factors should be taken into account.
Special considerations
An increased risk of inadequate intake exists, among other situations, with a very one-sided diet, malabsorption and in smokers or people with substantial passive-smoke exposure. In haemochromatosis, particular caution is advisable with high-dose vitamin C because it increases non-haem iron absorption.
Interactions / caution
Vitamin C can increase non-haem iron absorption. High-dose supplementation in haemochromatosis should only be used after professional consultation. During chemotherapy or radiotherapy, high-dose antioxidant supplementation should be coordinated with the treating team.
The information is provided for factual classification of product and nutrient data. It does not replace medical diagnosis or individual treatment advice.
