Heidelberger Chlorella Vitamin D3 1,000 IU Oil
30 ml · 1–4 drops per day
Product description
The detailed official product information was prioritised for the ingredients SSOT and additionally lists dl-alpha-tocopherol as an antioxidant. Dosage and ingredients have therefore been clarified from a technical perspective. The only unresolved point is the undeclared total number of drops in the 30 ml bottle; supply and price per day are not estimated.
Vitamin D3
1,000 IE per dayAssessment by Oliver Fröhner
Micronutrient expert & Food Coach
Product character
The detailed official product information was prioritised for the ingredients SSOT and additionally lists dl-alpha-tocopherol as an antioxidant. Dosage and ingredients have therefore been clarified from a technical perspective. The only unresolved point is the undeclared total number of drops in the 30 ml bottle; supply and price per day are not estimated.
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
Points to consider
- A current product- or batch-specific notice is available.
Data basis
- Quality/laboratory status is based on manufacturer information
Summary by Oliver Fröhner
The detailed official product information was prioritised for the ingredients SSOT and additionally lists dl-alpha-tocopherol as an antioxidant. Dosage and ingredients have therefore been clarified from a technical perspective. The only unresolved point is the undeclared total number of drops in the 30 ml bottle; supply and price per day are not estimated.
Manufacturer information and Oliver Fröhner’s editorial assessment are presented separately. Data checked: 21 Sep 2026.
Active ingredients & NRV
Active ingredients
Ingredients & additives
Trägerstoff: Sonnenblumenöl; Vitamin D3; Antioxidationsmittel: dl-alpha-Tocopherol.
Directions & package
Take 1–4 drops daily with a fat-containing meal. Dosage suitable for adults only, not for children.
30 ml · 8–30 days
Quality, lab & sources
Lab status: Manufacturer information
Manufacturing/quality management in Germany according to the manufacturer; quality standards are regularly monitored by independent German laboratories.
Product data checked on 21 Sep 2026.
Notes
Dosage suitable for adults only, not for children.
Micronutrient knowledge
Micronutrient knowledge
Physiological functions, notes on high or insufficient intake and relevant interactions — presented separately from the specific product assessment.
Vitamin D3
Vitamin D is a fat-soluble vitamin and also a precursor of hormonally active metabolites. For the assessment of supplements, product dose, dosing interval, total intake, 25-OH-vitamin-D status and safety limits are considered separately.
Functions
EU-authorised functions include, among other things: vitamin D contributes to normal absorption and utilisation of calcium and phosphorus, normal blood calcium levels, the maintenance of normal bones and teeth, normal muscle function and normal functioning of the immune system. Vitamin D also has a role in the process of cell division.
Possible signs of insufficient intake
Inadequate vitamin D status cannot be reliably identified from individual nonspecific symptoms. For individual assessment, 25-OH-vitamin-D status together with exposure, diet and supplemental intake is more informative than symptoms alone.
Points to consider at high intake
A markedly excessive vitamin D intake over a prolonged period can lead to hypercalcaemia and hypercalciuria and thereby place a burden on the kidneys and other organ systems. Upper Intake Levels are safety limits for long-term intake and are not optimal target values.
Special considerations
Particular caution is required, among other situations, with diseases or therapies that affect calcium metabolism or kidney function. High doses should not be derived solely from general target values.
Interactions / caution
Vitamin D can interact with certain medicines; relevant examples include drugs that affect calcium or vitamin D metabolism. With prolonged higher-dose use, individual medication should be taken into account.
Scientific assessment
Studies, meta-analyses and randomized controlled trials on the active ingredient – explained clearly and linked to sources.
The information is provided for factual classification of product and nutrient data. It does not replace medical diagnosis or individual treatment advice.
