Vitamins

Vitamin supplements are organic micronutrients in a convenient form, without which your body cannot function efficiently. On this page, you will find vitamin supplements in the form of drops and capsules — from vitamin D3 to B complex to vitamins A, E, and K2 — all from the Polish manufacturer Aura Herbals, with verified composition and clean label certification. Below, you will learn how to choose the right preparation, what to pay attention to when dosing, and when supplementation makes the most sense.

How to choose vitamins? Shopping guide

Above 90% of adult Poles^[1] do not meet the daily reference intake (DRI) for at least one vitamin from their diet — and vitamin D deficiencies affect even 90% of the population during the winter months^[2]. When choosing vitamin supplements, it is worth considering several specific criteria, not just the price of the package.

Chemical form of the vitamin

Not every form of vitamin is equally absorbable. Vitamin D3 (cholecalciferol) raises the level of 25(OH)D in the blood more effectively than D2 — this is confirmed by meta-analyses Tripkovic et al.^[3]. Methylcobalamin (the active form of B12) bypasses the hepatic conversion of cyanocobalamin, which is important for individuals with the MTHFR variant (Obeid et al., 2016)^[4]. In the u Bucha offer, the B Complex vitamin contains methylcobalamin, not the cheaper cyanocobalamin.

Solubility: water or fat?

Vitamins A, D, E, and K are fat-soluble — their absorption increases by as much as 32% with a fat-containing meal^[5]. Therefore, Aura Herbals products from this group contain MCT oil from coconut or olive oil as a carrier — a serving provides the fat needed for absorption without the need for special meal planning. B vitamins and vitamin C are water-soluble and can be taken at any time of the day.

Dose vs. individual requirements

The official DRI is the minimum dose to prevent deficiencies — not always optimal. The Polish Endocrine Society recommends adults take 1000–2000 IU of vitamin D3 daily as a preventive measure, and in case of confirmed deficiency — up to 4000 IU (100 µg)^[6]. Before reaching for higher doses, get a 25(OH)D test — it costs a few dozen zlotys at any diagnostic laboratory.

Synergy of ingredients

Vitamins D3 and K2 work synergistically: D3 increases calcium absorption from the intestines, while K2 (MK7 form) directs it to the bones, preventing deposition in blood vessels. (Kidd, 2010)^[7]. ADEK complexes combine all four fat-soluble vitamins in one serving. It's a convenient solution for the whole family when you want to avoid buying four separate bottles.

Certificates and manufacturer standards

Look for labels such as: GMP (Good Manufacturing Practice), clean label (no unnecessary excipients), laboratory tests from an independent accredited unit. All vitamin supplements available at u Bucha are produced in Poland by Aura Herbals under GMP standards and laboratory tested — this is important because the supplement market is not subject to as strict controls as prescription medications. It's also worth checking if the packaging has a batch identification code (LOT number) — this is proof of production reproducibility and the ability to track quality.

Who it's for and who it's not for

Vitamin supplementation makes sense primarily for: people on a plant-based diet (risk of B12, D3, A deficiency), residents of climatic zones above 40th parallel^[11] (D3 deficiency for about 6 months of the year), pregnant and breastfeeding women (increased demand for A, D, B-complex), seniors (reduced absorption of B12 from food) and individuals in recovery. Do not supplement "just in case" with high doses of vitamin A — WHO warns^[8], that excess retinol (above 3000 µg/day long-term) is teratogenic.

Most popular products in the vitamin category

At u Bucha, you will find two main types of vitamin supplements: oil-based drops (quick absorption, precise dosing) and capsules (travel convenience, ready dose without measuring). All products come from Aura Herbals — a Polish manufacturer using certified branded forms such as Quali®-D, Quali®-A, Quali®-E, and MenaQ7®, which distinguishes them from products with the cheapest unbranded equivalents. Below, we discuss all available products in this category.

Vitamin D3 — the foundation of supplementation

Vitamin D3 2000 IU FORTE, MCT, drops 50 ml (29.90 PLN) is a preparation with the certified form Quali-D® from lanolin in MCT oil from coconut. One 50 ml package contains as much as 1800 servings — a bottle lasts for over 4 years of daily use. For those needing higher support: Vitamin D3 4000 IU + K2, MCT, drops 50 ml (51.90 PLN) combines D3 (Quali®-D) with K2 in the MenaQ7® form from chickpeas. This is a synergy-rich set: D3 supports calcium absorption, K2 directs it where needed (Kidd, 2010)^[7]. B2B variant — VITAMIN D3 4000 IU + K2 FORTE, DROPS 30 ml (45.90 PLN) — this is a smaller 30 ml format, convenient for trying out or for travel.

Vitamin K2 — support for bones and coagulation

If you are already taking vitamin D3 and looking for K2 alone, you have two formats to choose from: Vitamin K2 90 µg, drops 30 ml (29.90 PLN / 150 servings) based on natto and olive oil — simple composition, good price/dose ratio. If you care about a clinically studied form in a higher dose, choose capsules with certified MenaQ7®: Vitamin K2MK7 MenaQ7® 200 µg, capsules 30 pcs. (39.90 PLN) or a more economical variant Vitamin K2MK7 MenaQ7® 200 µg, capsules 90 pcs. (89.90 PLN). All capsules are made from plant cellulose — suitable for vegans.

Complexes and vitamins A, E, B

Vitamin ADEK for the family, MCT, drops 50 ml (64.90 PLN) is four vitamins in one: Quali®-A, Quali®-D, Quali®-E, and MenaQ7® K2, with portioning adjusted to age — a good choice for a home with children. For skin and vision: Vitamin A + E, drops 30 ml (19.90 PLN) provides 100% NRV both vitamins from plant sources, alcohol-free and sugar-free, in an olive oil formula. It is best suited for combating chronic fatigue and supporting the nervous system Vitamin B Complex, 90 capsules. (29.90 PLN) — covers 100% NRV all B vitamins, contains methylcobalamin, vegan capsules made from cellulose. You can read more about the role of B12 in our article Vitamin B12 for fatigue — symptoms of deficiency, sources, and supplementation.

Hemp Oxymel — herbal support for immunity

Hemp Oxymel mokuLAB 250 ml (78 PLN) is a traditional preparation made from raw apple cider vinegar, honey, garlic, onion, ginger, and hemp seeds with CBD. Hand maceration for several weeks — this is not a vitamin raw material from a production line, but a handcrafted herbal composition supporting daily immunity. Also check our guide on how to improve your body's immunity using natural supplements.

Dosage and use of vitamin supplements

Both deficiency and excess of vitamins can harm health. Fat-soluble vitamins (A, D, E, K) accumulate in the body — their dosing requires caution. B vitamins and vitamin C are excreted in urine, so the risk of toxicity is lower, but not zero (NHS UK)^[9]. So how to dose effectively? Start by determining your current deficiency level (blood test), choose a preparation that meets your actual needs, and regularly verify the effects. Below are general guidelines — your doctor or dietitian may adjust them based on test results.

• Vitamin D3: prophylactically 1000–2000 IU/day for adults; with confirmed deficiency of 25(OH)D below 20 ng/ml — up to 4000 IU after consultation (PTE, recommendations 2023)^[6]. Take with a meal containing fat for optimal absorption.
• Vitamin K2MK7: 90–200 µg/day as a prophylactic dose; individuals taking anticoagulant medications (e.g., warfarin) must consult any dosage changes with a doctor, as K2 affects blood clotting (Schurgers et al., 2007)^[10].
• Vitamin B Complex: typically one capsule daily with a meal — contains 100% NRV for all B vitamins, including methylcobalamin.
• Vitamin A + E (drops): 5 drops daily provides 100% NRV of retinol and tocopherol; do not exceed the recommended dose due to the accumulation of retinol in fatty tissue.
• ADEK for the family: dosage depends on age — check the current table on the product page, as the dosage for children differs from that for adults.

If you are interested in a broader context of natural supplements, check out our article Ashwagandha drops vs capsules — which form works faster?.

How to use vitamins in drops? Step by step

Drops require a bit of attention when dosing — this is one of the most popular formats for purchasing vitamin supplements. Below you will find a step-by-step guide to fully utilize vitamin supplements in liquid form.

1. First, check the expiration date and the condition of the packaging. Fat-soluble vitamins oxidize after opening; seal the bottle tightly after each use and store in a cool, dark place (NHS recommendation)^[9].
2. Next, shake the bottle for a few seconds. Oil formulas may separate, especially with changes in ambient temperature. This is normal — it does not indicate a decrease in product quality.
3. Then measure the prescribed number of drops onto a teaspoon or directly onto the tongue. Typically for Aura Herbals products from this line: 5 drops = 1 serving (product description D3). Do not drop directly into a hot beverage — high temperatures may degrade vitamin D3.
4. Then take the preparation with a meal containing fat. (applies to vitamins A, D, E, K). Just a tablespoon of oil, a handful of nuts, or avocado. Dietary fats increase absorption by up to 32%^[5].
5. Finally, write the opening date on the bottle. Use the product within 3–6 months of opening (check the exact date on the label of the specific product). Vitamin supplements Stored according to recommendations, they maintain full activity until the expiration date.

Safety and contraindications

Vitamin supplements are safe when recommended doses are followed, but there are several important exceptions you need to be aware of. Why is this so important? Because in Poland, dietary supplements are classified as food, not medicine, which means less stringent oversight regarding safety — you or your doctor are responsible for the appropriate dosage.

• Pregnancy: the demand for vitamin D3 and folic acid is increasing; at the same time, vitamin A in doses above 3000 µg/day^[8] is teratogenic. Consult your doctor before supplementation.
• Anticoagulant medications: vitamin K2 interacts with warfarin and acenocoumarol (Schurgers et al., 2007)^[10]. If you are taking anticoagulants, do not use K2 supplements without explicit consent from your doctor.
• Kidney diseases: the kidneys activate vitamin D3 to calcitriol; in chronic kidney disease (CKD), dosing should be determined solely with a nephrologist. Incorrect dosing poses a risk of hypercalcemia^[9].
• Children under three years: only use products intended for this age group with a dosage adjusted to body weight and age — such as ADEK for the family, which has a dosing chart on the label.

Frequently asked questions

Should vitamin D3 be taken all year round, or only in winter?

In the Polish climate (51–54 degrees latitude N), the skin synthesis of vitamin D3 is effective only from May to September, between the hours of 10–15, with exposed skin and no SPF. For the remaining seven months, synthesis is practically zero. (Wolpowitz and Gilchrest, 2004)^[11]. Therefore, most specialists recommend supplementation throughout the year, with a possible reduction in dosage during the summer.

What is the difference between vitamin K2 MK7 and MK4?

MK7 (menaquinone-7) has a longer half-life in serum — up to 72 hours^[10] — which allows for once-daily dosing. MK4 is metabolized faster and mainly used in pharmacological therapeutic doses, not preventive ones. For daily supplementation for athletes and seniors, the MK7 form found in all K2 products from u Bucha is recommended.

Can B vitamins be taken in the evening?

Vitamins B6 and B12 may cause stimulation and make it difficult for some people to fall asleep. It is recommended to take them in the morning or at the latest by noon with a meal. Vitamin B Complex from Aura Herbals (1 capsule = 100% NRV) — one morning dose is the optimal strategy for most people.

How long does it take to see the effects of vitamin D3 supplementation?

The level of 25(OH)D in serum measurably increases after 4–8 weeks^[3] of regular supplementation. A noticeable improvement in mood and energy may take 2–3 months, especially if the starting level was low. The most reliable way to assess effectiveness is to test 25(OH)D in the blood after 8–12 weeks of starting supplementation.

Can vitamin supplements replace a healthy diet?

No. No supplement can replicate the complex matrix of nutrients, fiber, phytonutrients, and bioactive compounds found in whole foods. Vitamin supplements make sense as a dietary complement — especially in cases of documented deficiencies or increased demand (NHS UK)^[9]. A healthy, varied diet remains the foundation of health.

Do liquid vitamins absorb better than capsules?

For fat-soluble vitamins (A, D, E, K), oil drops have an advantage because the fat carrier facilitates absorption in the intestines (Roodenburg et al., 2000)^[5]. Capsules with the appropriate oil carrier are equally effective when taken with a meal. Aura Herbals products in both forms consider the aspect of bioavailability in their composition.

How much does monthly vitamin supplementation from u Bucha cost?

Basic set — D3 2000 IU + K2MK7 — for 30 days costs about 30–52 PLN per month depending on the selected set. A bottle of D3 2000 IU 50 ml (29.90 PLN) lasts for 1800 servings — the cost of one dose is about 1.6 groszy. Shipping is free for orders over 199 PLN.

Are Aura Herbals products suitable for vegans?

Most yes. Vitamin B Complex, both lines of K2MK7 MenaQ7® capsules (chickpeas, plant cellulose), and vitamins in drops with olive oil or MCT oil are vegan. The exception is vitamin D3 from lanolin (sheep wool) — this is described on the product page. Vegan D3 from lichens is not yet available in this product line.

This website is for informational and educational purposes only and does not replace consultation with a physician. If you are pregnant, breastfeeding, taking medication, or have a chronic condition, please consult a specialist regarding the use of supplements or herbs.