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Antioxidants as a Dietary Supplement
Antioxidant dietary supplements: your cell protection against free radicals
Here you will find antioxidants as a dietary supplement for your cell protection: from OPC from grape seeds through turmeric and astaxanthin to resveratrol, plus proven adaptogens such as Ashwagandha and Shilajit. Antioxidants intercept free radicals, those reactive molecules that arise during metabolic processes, exercise, UV radiation, and environmental influences and can trigger oxidative stress.
What are antioxidants?
Antioxidants neutralize free radicals and thus help maintain a balance in the body. The body produces part of them itself, and you take in another part through your diet, above all through fruit, vegetables, nuts, and tea.
Free radicals and oxidative stress
Free radicals are a normal part of metabolism. They also arise from UV radiation, environmental toxins, smoke, and intense physical exertion. If free radicals permanently predominate due to such influences, oxidative stress develops: a state in which free radicals can put a strain on the cells. Antioxidants act here as radical scavengers.
Vitamins, trace elements, and secondary plant compounds
Antioxidants are not a uniform group. They include vitamins such as vitamin C, vitamin E, and vitamin A, the trace elements selenium and zinc, as well as secondary plant compounds such as carotenoids (for example beta-carotene and astaxanthin), polyphenols, and flavonoids. For some of these nutrients, cell protection is officially confirmed: vitamin C, vitamin E, selenium, zinc, and riboflavin (vitamin B2) contribute to the protection of cells from oxidative stress.1 Vitamin C, selenium, and zinc additionally contribute to a normal function of the immune system.1 The fat-soluble vitamin E sits primarily in the cell membranes. We describe plant compounds such as astaxanthin, OPC, or resveratrol by their origin and compound class, because their benefit lies in their natural composition.
Antioxidants as capsules, tablets, or powder: which suits you?
Antioxidant dietary supplements come in several dosage forms, and the choice is above all a question of practicality. Antioxidant capsules are the classic: precisely dosed, taste-neutral, easy to take on the go. Powder is suitable if you stir larger amounts into a shake, for example with an antioxidant complex made from berries and plant extracts. Tablets sit in between. Fat-soluble antioxidants such as astaxanthin are best taken with a meal containing some fat, because the body absorbs them better that way.
Which antioxidants are the most important?
Each antioxidant has its own profile. This overview shows you the best-known ones at a glance, with the matching product in our shop:
| Antioxidant | Origin / compound class | In our shop |
| Astaxanthin | red carotenoid from the microalga Haematococcus pluvialis2 | Astaxanthin capsules |
| OPC (grape seed extract) | oligomeric proanthocyanidins from grape seeds, a plant compound | OPC 95 from GN Laboratories |
| Resveratrol | polyphenol, naturally found in grapes and berries | Resveratrol capsules |
| Curcumin | pigment of the turmeric root, often combined with piperine3 | Turmeric capsules from GN Laboratories |
| Coenzyme Q10 | fat-soluble substance produced by the body itself (ubiquinone) | Coenzyme Q10 |
Manufacturers obtain astaxanthin from the blood rain alga and deliver it in high doses, for example with 12 mg per capsule. OPC is concentrated in the grape seed extract from GN Laboratories, standardized by HPLC analysis. Resveratrol occurs naturally in the skins of red grapes and is concentrated as an extract for capsules. Curcumin is the yellow pigment of the turmeric root: piperine from black pepper can significantly improve its absorption,3 which is why good turmeric capsules combine both.
Beyond the classic antioxidants, in this category you will find a large selection of Ashwagandha, from Shoden through KSM-66 to Ashwa-Bol, the Shilajit Pro from GN Laboratories, the Natural Antioxidants complex made from berries and plant extracts, as well as NR300 as a vegan NAD+ precursor.
Which antioxidants for which needs?
Which antioxidants make sense for you as a dietary supplement depends on your diet, daily life, and activity. A few typical starting situations:
Antioxidants for athletes
Those who train intensively often reach for Astaxanthin, OPC, or Coenzyme Q10. A note from sports science: training itself triggers oxidation in the short term, and this is part of the training stimulus. Very high doses around the workout are therefore not automatically better; a moderate baseline is usually the smarter choice.
Antioxidants for environmental exposure and stress
Those exposed to environmental influences and everyday stress like to combine the classics with Vitamin C and the trace elements Zinc and selenium, for which cell protection is listed.1 External influences such as UV radiation and city air also increase the load of free radicals.
Antioxidants for a plant-based diet
Many antioxidants are plant-based by nature. Astaxanthin from algae, OPC from grapes, and curcumin from turmeric fit into a vegan routine, available in our range as vegan capsules without animal-derived ingredients.
Antioxidants in the diet: the best foundation
Foods with a high antioxidant content
The best foundation comes from an antioxidant mix of real foods. Particularly rich in antioxidant compounds are:
- Berries such as blueberries, aronia, and pomegranate
- Dark chocolate with a high cocoa content
- Nuts such as walnuts and almonds
- Green vegetables such as kale and spinach
- Green tea, turmeric, and herbs such as thyme
These foods deliver secondary plant compounds, bioflavonoids, and micronutrients in a natural combination.
The ORAC value as a guide
As a rough reference point, some use the ORAC value (Oxygen Radical Absorbance Capacity), a laboratory value for the antioxidant capacity of a food. It is a guide, not an exact prediction for the body. A colorful, plant-focused diet remains the foundation. An antioxidant dietary supplement comes in exactly where you want to supplement a single compound in a targeted way. In a concentrated amount, as a natural source of antioxidants.
Buying antioxidants: what you should look for
With antioxidants, quality is decisive. These points help you with your selection:
- Standardized content: a declared active ingredient content, for OPC ideally verified by HPLC, instead of vague quantity claims.
- Purity: without unnecessary additives and fillers, lab-tested for heavy metals and pesticides.
- Bioavailability: sensible combinations such as curcumin with piperine, or fat-soluble forms taken with a meal.
- Vegan capsule shell: a plant-based shell, free from artificial additives.
- Transparent labeling: all ingredients clearly declared per capsule or serving, without numbers games.
A good product gets by with few, clearly declared ingredients. Unnecessary additives have little place in it. This way you get the best out of your antioxidant.
Safety and sensible use
Antioxidants are not a miracle cure, and more is not automatically better. A few points so you use them sensibly:
- Diet first: The foundation remains a varied, plant-focused diet. A dietary supplement complements it in a targeted way; it does not replace it.
- Dose in moderation: Very high doses of individual antioxidants provide no additional benefit. Stick to the recommended intake on the product.
Buy antioxidant dietary supplements at Gigas Nutrition
In our shop you will find antioxidants from tested brands: high-dose OPC from grape seeds and turmeric with piperine from GN Laboratories, natural astaxanthin from the blood rain alga, resveratrol, as well as the Natural Antioxidants complex made from berries and plant extracts. Plus the large selection of Ashwagandha and Shilajit. Every dietary supplement is clearly labeled, in tested quality, and mostly available as a vegan capsule. With us, you order with free shipping from 75 euros, with fast delivery.
Goes well with this: Ashwagandha, OPC from GN Laboratories, turmeric with piperine, and Shilajit Pro.
Sources
1 Verordnung (EU) Nr. 432/2012 der Kommission (list of permitted health claims, including vitamin C, vitamin E, selenium, zinc, riboflavin: protection of cells from oxidative stress; vitamin C, selenium, zinc: normal function of the immune system). https://eur-lex.europa.eu/legal-content/DE/TXT/?uri=CELEX:32012R0432
2 Ambati R. R. et al. (2014): Astaxanthin: sources, extraction, stability, biological activities and its commercial applications, a review. Marine Drugs 12(1). https://pubmed.ncbi.nlm.nih.gov/24402174/
3 Shoba G. et al. (1998): Influence of piperine on the pharmacokinetics of curcumin in animals and human volunteers. Planta Medica 64(4). https://pubmed.ncbi.nlm.nih.gov/9619120/
Frequently asked questions about antioxidants
What are antioxidants?
Antioxidants are compounds that capture free radicals. Free radicals arise normally during metabolic processes; in excess they lead to oxidative stress. The body produces some antioxidants itself, and you take in others through your diet. Among the best known are vitamin C and E, selenium, zinc, beta-carotene as well as plant compounds such as astaxanthin, OPC and resveratrol.
Which foods contain a lot of antioxidants?
Particularly rich in antioxidants are berries such as blueberries and aronia, dark chocolate with a high cocoa content, nuts, kale, turmeric as well as green and black tea. A colourful, plant-focused diet is the best foundation, and a dietary supplement can add to it in a targeted way.
What is the strongest antioxidant?
There is no universally valid ranking, because the compounds work in different ways. In the discussion about especially powerful antioxidants, astaxanthin from algae and OPC from grape seeds come up often. Which one suits you depends on your goal and your diet.
Are antioxidants better as a capsule or through the diet?
The foundation is always a varied diet with plenty of fruit and vegetables. An antioxidant supplement is a sensible option when you want to add a single compound such as astaxanthin or OPC in a targeted way, one that is hard to take in through food in that amount.
When is the best time to take antioxidants?
Fat-soluble antioxidants such as astaxanthin and coenzyme Q10 are best taken with a meal containing some fat. Water-soluble vitamin C is sensibly spread across the day. Stick to the recommended intake on the respective product.