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Integrative Medicine
—

Understanding Dietary Supplement Forms: From Softgel to Tincture and More!

Updated on March 4, 2025 | Published on February 28, 2023
Fact checked
Karolina Zaremba, CNP Avatar
Written by Karolina Zaremba, CNP
Dr. Christopher Knee, ND
Medically reviewed by Dr. Christopher Knee, ND
  1. Wellness blog
  2. Understanding Dietary Supplement Forms: From So...

With so many dietary supplement forms available, you may have questions such as “What is a tincture?”, “What’s the difference between capsules vs. tablets?”, or “Which form is easiest to swallow?”

In this article, we provide an overview of dietary supplement forms, including some key pros and cons of each one to keep in mind.

What Are Dietary Supplements?

According to U.S. federal regulations and the National Institutes of Health, a dietary supplement is defined as a product that contains one or more dietary ingredients, is taken orally (by the mouth), and is intended to supplement the diet. Dietary ingredients that can be found in supplements include herbs or botanicals, amino acids, vitamins, minerals, and many other ingredients, as well as components of these ingredients. According to regulations, these products must include the term “dietary supplement” on the front panel of the supplement label.  (15)

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Different Types of Supplement Forms

Oral Dietary Supplement Forms

During product development, supplement manufacturers consider many factors when selecting delivery forms. Supplements may be better suited to certain delivery forms based on many factors, such as their stability, uniformity, user experience, release time, and resistance to the gastrointestinal environment. (5) The formulation of a dietary supplement may affect the product’s bioavailability, which refers to the proportion of the active ingredient that is absorbed and used by the body. (16)

Similarly, there may be various reasons why an individual may prefer one supplement delivery format over another. We outline common dietary supplement forms and considerations below.  

common dietary supplement forms
There are many oral supplement delivery forms, such as capsules, tablets, softgels, chewable tablets, powders, and liquids. (1)(2)(4)(5)(7)(8)(9)(16)(18)

Supplement Capsules vs. Tablets: What’s the Difference?

Capsules and tablets are both common oral pill formats, but there are key differences. Capsules consist of a hard, smooth casing that is filled with the powder or liquid oil of the supplement ingredient(s). Capsules may be made with a gelatin casing, referred to as gelcaps, or a plant-derived source, referred to as veggie caps. Also called phytocaps, veggie caps are commonly made of vegetable cellulose, an insoluble carbohydrate. Often, capsules are filled with only the active ingredient in powder or granules; however, some products may also contain fillers such as cellulose.

Supplements in larger capsules may be difficult to swallow. However, the capsule shell ensures that bitter or unpleasant tasting ingredients aren’t tasted in the mouth. (1)

Tablets, on the other hand, are produced by compressing the powder or granules of the active ingredient with or without excipients. (12) Excipients are ingredients used as fillers, binders, and bulking agents, or to otherwise assist in the manufacturing process or improve the finished supplement product. (6) For example, vitamin C tablets may contain additional ingredients such as cellulose, silicon dioxide, magnesium stearate, and stearic acid as components of the tablet.

Benefits of Tablets

Tablets allow the supplement ingredients to be concentrated, which generally results in a higher dose in the finished product when compared to a capsule or softgel. Depending on the supplement, certain tablets may be split or crushed, making them easier to take for individuals who have difficulty swallowing pills. However, certain ingredients have an unpleasant taste, which can be noticeable when taking the supplement in tablet form. (1)

Did you know? In 2013, the National Institutes of Health launched the Dietary Supplement Label Database (DSLD), a tool that allows individuals to search for information on supplement labels of almost all products sold in the U.S. supplement market. (13) According to the DSLD, 48% of all products are in capsule form and 22% are in tablet form. (16)

Softgel Supplements

Softgels are a form of pills that contain a liquid supplement ingredient within a gelatin capsule, which is commonly derived from beef or pork gelatin. The gelatin shell helps to protect the contents against spoilage from oxidation and UV rays. Softgels are considered to be easier to swallow than capsules and are generally tasteless or have a mild taste from the softgel casing. (1)

Chewable Supplement Tablets

Chewable tablets, such as chewable vitamin C, are designed to be chewed and broken down in the mouth prior to swallowing. Chewable tablets are often flavored and colored with natural and/or artificial ingredients, such as sweeteners. Chewable tablets provide a solution for individuals who have trouble swallowing, and the taste is intended to make taking supplements more appealing, such as with chewable vitamin C for children. (1)

Gummy Vitamins

Similar to chewable tablets, supplements in gummy formats, such as gummy vitamins, are designed to provide a convenient and tasty way to take the supplement. Approximately 1% of dietary supplements in the United States are sold in gummy format. (16) In addition to individual gummy vitamins, such as vitamins C or D gummies, you may often see multivitamins, fish oil, and melatonin gummies.

green smoothie with supplement powder
You can use a shaker bottle or blender to help mix protein powder and other powder supplements in liquid.

Powder Supplements

Supplements in powder form make up approximately 14% of supplements available in the United States. (16) Supplement powders are typically dissolved in water or another liquid when they are taken. Unlike capsules or tablets, they do not need to be disintegrated during digestion, so they are considered to be more easily absorbed. A powder format can also provide a higher dose than supplements in pills, reducing the need to take multiple capsules or tablets. (8) Common examples of powders include probiotic powder and protein powder.

Did you know? According to the 2020 Council for Responsible Nutrition Consumer Survey on Dietary Supplements, the top three factors that influence consumer delivery form preferences are ease of swallowing, price, and format. (4)

Liquid Supplements

Liquid supplements include a variety of products such as vitamin d drops, other liquid vitamins, liquid melatonin, and liquid iron supplements. Unlike powders, liquid vitamins and other liquids do not need to be mixed into water. Individuals with difficulty swallowing pills may prefer to take supplements in liquid form. Liquid supplements are considered to have a high bioavailability; (7) however, research suggests that the carrier (ingredient to assist supplement delivery) can affect the product’s bioavailability. (10)

For example, a review of vitamin D absorption studies compared the absorption rate of vitamin D supplements when combined with different carrier ingredients, including oil, ethanol (alcohol), cellulose, and lactose. The vitamin D supplements with oil and ethanol carriers were in the form of liquid vitamin D drops, while the vitamin D supplements with cellulose and lactose powder carriers were in tablet form. Supplementation with oil-based carriers was associated with the greatest increase in serum (blood) vitamin D levels. (10) You’ll commonly see fat-soluble vitamins and other fat-soluble ingredients in an oil carrier, either in liquid form or as softgels.

Supplement Tincture

A tincture is a type of liquid herbal extract that is manufactured by soaking herbs in a liquid base over a period of several weeks, which is then strained to remove the plant material. (3) Tinctures are traditionally manufactured with an alcohol base, although alcohol-free varieties are made using vinegar or glycerin. Alcohol helps to extract the active components of the herb and also acts as a preservative in the finished product. (17)

Herbal tinctures are generally taken on their own or diluted in a small amount of water; however, some herbal tinctures have a strong or bitter taste that may be unpleasant. The liquid format allows for the dose to be carefully adjusted if required. For more information on medicinal herbs and their forms, visit the Fullscript blog.

bottle and dropper of tincture extract
A tincture is a type of herbal extract that is manufactured by soaking medicinal herbs in an alcohol base.

Energy Bars

Energy bars are food-based supplements that provide varying amounts of carbohydrates, proteins, and fats as a source of calories for energy. Energy bars may also be fortified with additional nutrients, such as vitamins and minerals. Energy bars are commonly used to support athletic performance by replacing calories used during physical activity, particularly in endurance activities such as ultramarathons. (18) Energy bars and other food-based supplements, such as energy gels and energy drinks, are commonly used for their taste and convenience.

What About Supplement Novel Delivery Forms?

Supplement manufacturers are innovating several new dietary supplement delivery formats, which are largely tied to consumer demand for portability and convenience. (5) New supplement delivery formats include:

  • Chewable softgels 
  • Liquid stick packs, designed to dissolve in a bottle of water
  • Orally disintegrating powders in stick packs
  • Orally disintegrating tablets (e.g., sublingual tablets)
  • Sprays (5)

Other Supplement Delivery Formats

Other natural health products are used as alternative delivery formats to oral supplementation, including IV vitamin therapy and topical cream products. 

IV Vitamin Therapy

Intravenous vitamin therapy, known as IV vitamin therapy, is a treatment that involves injecting a liquid solution of micronutrients into the bloodstream intravenously. The IV solution may contain primarily one vitamin, commonly vitamin C, or a combination of water-soluble vitamins, minerals, or other compounds. (2) Intravenous administration of nutrients has been shown to significantly increase plasma levels of the injected ingredient to levels that cannot be obtained through oral supplementation. (14)

The role of high-dose IV vitamin C therapy in health and disease has been investigated since approximately the 1970s. Despite this, evidence on the health effects of IV vitamin therapy is mixed, and there are currently no standardized recommendations. (19)

Topical Cream

Transdermal products, which include topical cream, gel, and lotion, are applied to and absorbed by the skin. These products are designed to bypass the gastrointestinal tract in order to increase the absorption of the active ingredient(s). (9)

Research has examined whether ingredients in topical cream products are, in fact, absorbed through the skin into circulation in the body. A review study that examined the effects of transdermal application of magnesium found that magnesium topical cream application is associated with a clinically relevant increase in blood magnesium levels. (9) 

Topical creams with certain dietary ingredients are also used to address skin issues. For example, a review that assessed the effects of zinc-containing topical creams found that various zinc creams were effective in treating skin conditions such as localized psoriasis and eczema. (11)

The Bottom Line: Find the Best Supplement Forms for Your Health and Lifestyle Preferences

The various forms of dietary supplements each come with their own pros and cons. When selecting dietary supplements, you should consider how these factors will align with your individual preferences, lifestyle, and wellness regimen. Speak to your integrative healthcare practitioner about which dietary supplements and forms are best for you.

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References
  1. Advanced Orthomolecular Research. (2019, August 26). Softgels vs. capsules vs. tablets: Which is right for you? https://aor.us/softgels-vs-capsules-vs-tablets-which-is-right-for-you/
  2. Ali, A., Njike, V. Y., Northrup, V., Sabina, A. B., Williams, A.-L., Liberti, L. S., Perlman, A. I., Adelson, H., & Katz, D. L. (2009). Intravenous micronutrient therapy (Myers’ cocktail) for fibromyalgia: A placebo-controlled pilot study. The Journal of Alternative and Complementary Medicine, 15(3), 247–257. 
  3. American Botanical Council. (n.d.). Terminology. https://www.herbalgram.org/resources/terminology/
  4. Council for Responsible Nutrition. (2020). 2020 CRN consumer survey on dietary supplements. https://www.crnusa.org/resources/2020-crn-consumer-survey-dietary-supplements-consumer-intelligence-enhance-business
  5. Dalapa, D. (2020, August 17). Supplement manufacturing: Delivery forms. Natural Products Insider. https://www.naturalproductsinsider.com/contract-manufacturing/supplement-manufacturing-delivery-forms
  6. Furrer, P. (2018, January 5). The central role of excipients in drug formulation. European Pharmaceutical Review. https://www.europeanpharmaceuticalreview.com/article/18434/the-central-role-of-excipients-in-drug-formulation-2/
  7. GFR Pharma. (2017a, April 11). Liquid supplement manufacturer. https://gfrpharma.com/nhp-manufacturer/liquid-supplements/
  8. GFR Pharma. (2017b, April 11). Powder supplement contract manufacturer. https://gfrpharma.com/nhp-manufacturer/powder-supplement/
  9. Gröber, U., Werner, T., Vormann, J., & Kisters, K. (2017). Myth or reality—Transdermal magnesium? Nutrients, 9(8), 813. 
  10. Grossmann, R. E., & Tangpricha, V. (2010). Evaluation of vehicle substances on vitamin D bioavailability: A systematic review. Molecular Nutrition & Food Research, 54(8), 1055–1061. 
  11. Gupta, M., Mahajan, V. K., Mehta, K. S., & Chauhan, P. S. (2014). Zinc therapy in dermatology: A review. Dermatology Research and Practice, 2014, 1–11. 
  12. Hadjittofis, E., Das, S. C., Zhang, G. G. Z., & Heng, J. Y. Y. (2016). Interfacial phenomena. In Developing solid oral dosage forms: Pharmaceutical theory & practice (2nd ed., pp. 225–252). Academic Press. https://www.sciencedirect.com/science/article/pii/B978012802447800008X
  13. Office of Dietary Supplements. (n.d.). Dietary Supplement Label Database (DSLD). https://ods.od.nih.gov/Research/Dietary_Supplement_Label_Database.aspx
  14. Office of Dietary Supplements. (2020a, February 27). Vitamin C. https://ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/
  15. Office of Dietary Supplements. (2020b, March 11). Dietary supplements: Background information. https://ods.od.nih.gov/factsheets/DietarySupplements-Consumer/
  16. Saldanha, L. G., Dwyer, J. T., Bailen, R. A., Andrews, K. W., Betz, J. W., Chang, H. F., Costello, R. B., Ershow, A. G., Goshorn, J., Hardy, C. J., & Coates, P. M. (2018). Characteristics and challenges of dietary supplement databases derived from label information. The Journal of Nutrition, 148(suppl_2), 1422S-1427S. 
  17. St Francis Herb Farm. (2020, August 12). Frequently asked questions. https://stfrancisherbfarm.com/faq/
  18. Williamson, E. (2016). Nutritional implications for ultra-endurance walking and running events. Extreme Physiology & Medicine, 5, 13. 
  19. Wilson, M. K., Baguley, B. C., Wall, C., Jameson, M. B., & Findlay, M. P. (2014). Review of high-dose intravenous vitamin C as an anticancer agent. Asia-Pacific Journal of Clinical Oncology, 10(1), 22–37.

Author

Karolina Zaremba, CNP Avatar
Written by Karolina Zaremba, CNP
Dr. Christopher Knee, ND
Medically reviewed by Dr. Christopher Knee, ND

Disclaimer

The information in this article is designed for educational purposes only and is not intended to be a substitute for informed medical advice or care. This information should not be used to diagnose or treat any health problems or illnesses without consulting a doctor. Consult with a health care practitioner before relying on any information in this article or on this website.

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