Supplements promising enhanced beauty and overall health are increasingly popular. Among these, collagen, biotin, keratin, and hyaluronic acid are frequently touted for their benefits. This article delves into the science behind these compounds, examining their individual roles, potential benefits, and the evidence supporting their use.
Collagen is a protein and a vital component of connective tissue in the body. It's a major structural protein, making up a significant portion of our bones, ligaments, tendons, skin, blood vessels, and internal organs. In fact, collagen constitutes at least 30% of the body's protein content. It provides elasticity and strength to these tissues. Collagen is composed of four amino acids: proline, glycine, lysine, and hydroxyproline. These amino acids are grouped in a triple helix formation.
As we age, the body's natural collagen production slows down, leading to a decline in skin elasticity and firmness, the development of wrinkles, and potentially slower wound healing. This has led to the popularity of collagen supplements, which aim to replenish the body's collagen levels.
There are different types of collagen, each with a specific role:
Biotin, also known as vitamin B7, is an essential water-soluble vitamin that the body cannot produce on its own. It must be obtained through diet or supplements. Biotin plays a crucial role in various metabolic processes, helping enzymes metabolize glucose, fatty acids, and amino acids. A biotin deficiency can lead to hair loss, brittle nails, and skin infections.
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Keratin is a structural protein that is a key component of hair and nails. It provides strength and resilience to these structures. Some supplements contain bioavailable keratin, which delivers amino acids, including cysteine, to reduce hair shedding, increase hair brightness, and improve nail strength. For example, Cynatine® HNS is a bio-available Keratin clinically tested for promoting strength and luster.
Hyaluronic acid is a substance that helps keep the skin hydrated. As part of an all-inclusive beauty solution, hyaluronic acid nourishes your body with essential nutrients for a transformative experience.
Collagen supplements are often marketed for their potential to improve skin health, reduce joint pain, and strengthen bones. Research suggests that collagen supplements may improve skin hydration and elasticity, potentially reducing the appearance of wrinkles.
A 2019 systematic review of studies on oral collagen supplements found evidence that collagen might improve skin aging, cellulite, skin dryness, and ulcers. Some studies have also shown improvements in skin hydration and elasticity with collagen tripeptide and improvements in the appearance of skin aging with collagen dipeptide.
Collagen peptides, which are small pieces of protein from animal collagen, seem to build up in the skin and cartilage when taken orally, potentially improving some skin and joint conditions. Collagen peptides have been safely used in doses up to 10 grams daily for up to 6 months.
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Biotin is primarily known for its role in promoting healthy hair and nails. Supplementing with biotin may reduce hair loss in people with a biotin deficiency. Some studies suggest that biotin may also help regrow hair and reduce hair loss even in individuals without a deficiency, although more research is needed.
Bioavailable Keratin delivers I8 amino acids, including cysteine, to reduce hair shedding, increase hair brightness, and improve nail strength.
Hyaluronic Acid helps keep the skin hydrated.
While supplements can be beneficial, it's essential to have realistic expectations. Experts emphasize that many hair, skin, and nail supplements contain much more biotin than the body needs. Consuming too much biotin can alter test results, such as thyroid testing, cardiac testing, and vitamin D testing.
Getting nutrients through a balanced diet is generally a safer and more effective approach. Foods high in biotin include egg yolk, while foods that promote collagen production include beans.
Read also: The Ultimate Guide to Collagen and Keratin Supplements
Supplements are not as closely regulated by the Food and Drug Administration (FDA) as medications. It's crucial to purchase supplements from trusted companies that conduct third-party testing to ensure the product contains the active ingredients it claims to have and is free from contaminants.
Before taking any supplement, it's wise to consult with a healthcare professional to discuss potential risks and interactions with other medications.
There is no scientific evidence that collagen or biotin causes weight gain, despite claims on forums and social media.
While traditional collagen sources are animal-based, scientists have developed methods to create vegan collagen using genetically modified yeasts and bacteria. Vegan foods like nuts, seeds, legumes, and soy products can also help the body synthesize collagen. Numerous vegan foods contain biotin, including nuts, seeds, sweet potatoes, apples, broccoli, and spinach.
If you are planning to take a collagen supplement, either in liquid or powder form, it is important to mention that the triple helix that makes up collagen is unable to be absorbed in its whole form. These new proteins may not contain the same amino acids that were initially ingested in the collagen supplement, and it is unknown if these restructured proteins will target the area a supplement manufacturer is advertising. Therefore, it is undetermined at this time if the body will use a collagen supplement that is purported to help skin, hair, nail and joint support to actually make collagen that would do so.
High doses of biotin (10-300 milligrams per day) can provide false high or low blood levels of thyroid-stimulating hormone, vitamin D, and troponin. Therefore, it is important to let your healthcare provider know if you are taking a biotin supplement.
Collagen peptides have been safely used in doses up to 10 grams daily for up to 6 months.
At typical dosages, biotin and collagen are likely safe. However, it's always best to consult with a healthcare professional before starting any new supplement regimen.
Some animal products contain collagen, such as chicken, fish, and bone broth. Plant foods containing glycine, proline, and hydroxyproline, which are the amino acids that help the body make collagen, include nuts, legumes, seeds, and soy products.
A wide range of foods contain biotin, including eggs, meat (such as beef liver and pork chop), fish (such as salmon), milk, almonds, whole-wheat bread, apples, cheddar cheese, and plain yogurt.
While collagen, biotin, keratin, and hyaluronic acid can offer potential benefits for skin, hair, and nail health, they are not magic bullets. A holistic approach that includes a balanced diet, regular exercise, adequate sleep, and stress management is essential for overall well-being and optimal results.
Following a Mediterranean diet rich in beans, whole grains, fresh fruits, and vegetables can help you get the nutrients you need.
"The best anti-aging supplement is exercise, especially high-intensity exercise with weights, three times a week,"
Optimizing your sleep and your circadian rhythm is important for overall health.
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