5 Best supplements for hair growth and thickness

  • February 10, 2024
Reading Time: 10 minutes
  • Introduction to Vitamins and Hair Growth
  • Topic 1: Vitamin C – The Collagen Builder
    • Importance of Collagen for Hair Health
    • Sources of Vitamin C
    • Recommended Daily Intake
    • Potential Risks and Side Effects
  • Vitamin B – The Cellular Function Enhancer
    • Role of Vitamin B Complex in Hair Growth
    • Different Types of Vitamin B and Their Functions
    • Foods Rich in Vitamin B
    • Impact of Vitamin B Deficiency on Hair Health
  • Zinc – The Hair Follicle Strengthener
    • Zinc’s Role in Hair Growth
    • Dietary Sources of Zinc
    • Recommended Zinc Intake
    • Effects of Zinc Deficiency on Hair
  • Iron – The Hemoglobin Producer
    • Importance of Iron for Hair Growth
    • Iron-Rich Foods
    • Absorption Enhancers and Inhibitors
    • Symptoms of Iron Deficiency Related to Hair Loss
  • Vitamin D – The Cell Growth Stimulator
    • How Vitamin D Affects Hair Growth
    • Sources of Vitamin D
    • Optimal Levels of Vitamin D
    • Link Between Vitamin D Deficiency and Hair Loss

Introduction to Vitamins and Hair Growth

Many people believe that having healthy hair reflects their general health, and vibrant, strong hair is largely maintained by diet. While a person’s lifestyle and genetics have a role in their hair health, maintaining a sufficient intake of key vitamins is critical for both stimulating hair growth and preventing hair loss.


Vitamin C – The Collagen Builder

Vitamin C-Fruits

Collagen production is a critical process that requires Vitamin C and is necessary for the strength and structure of hair. It facilitates the uptake of iron from plant-based sources, another essential vitamin for healthy hair. Vitamin C is also an antioxidant that works to prevent oxidative stress and shields hair follicles from harm. Including foods high in vitamin C, such as leafy greens, berries, and citrus fruits, in your diet can encourage healthy hair development.

Possible side effects of Vitamin C, also known as ascorbic acid, typically occur when consumed in excessive amounts. While Vitamin C is generally safe when taken within recommended doses, consuming large doses through supplements may lead to adverse effects.

  • Digestive Issues: Taking high doses of Vitamin C supplements can cause digestive discomfort such as diarrhea, nausea, vomiting, or abdominal cramps.
  • Kidney Stones: Excessive intake of Vitamin C may increase the risk of kidney stone formation, especially in individuals with a history of kidney stones or those prone to developing them.
  • Iron Overload: Vitamin C enhances iron absorption from plant-based sources, which could lead to iron overload in individuals with a predisposition to iron accumulation disorders.
  • Increased Oxalate Levels: Vitamin C supplements may elevate oxalate levels in the body, potentially contributing to the formation of kidney stones in susceptible individuals.
  • Interference with Medical Tests: High doses of Vitamin C can interfere with certain medical tests, such as blood glucose monitoring and stool tests for occult blood, leading to inaccurate results.
  • Allergic Reactions: Although rare, some individuals may experience allergic reactions to Vitamin C supplements, manifesting as hives, itching, swelling, or difficulty breathing.
  • Interactions with Medications: Vitamin C supplements can interact with certain medications, including blood thinners, chemotherapy drugs, and medications for heart disease or diabetes. It’s essential to consult a healthcare professional before starting Vitamin C supplementation, especially if taking prescription medications.

It’s crucial to consume Vitamin C within recommended daily allowances, which vary based on age, gender, and specific health conditions. Obtaining Vitamin C from whole foods like citrus fruits, strawberries, bell peppers, and leafy greens is generally preferable, as they provide additional nutrients and fiber. If considering Vitamin C supplements, it’s advisable to consult a healthcare provider to determine appropriate dosage and potential risks, especially for individuals with pre-existing medical conditions or those taking medications.

Reference Links:

National Institutes of Health Office of Dietary Supplements. (2021). Vitamin C: Fact Sheet for Health Professionals.

Mayo Clinic. (2021). Vitamin C (ascorbic acid): Side Effects

Here are some recommended products that can help boost Vitamin C intake, aiding in collagen production and overall skin health:

  1. Nature’s Bounty Vitamin C: Nature’s Bounty offers a range of Vitamin C supplements in various forms such as tablets, capsules, and gummies. Their products are known for their high quality and potency, providing an easy way to supplement Vitamin C intake.
  2. TruSkin Vitamin C Serum: TruSkin’s Vitamin C Serum is a popular skincare product infused with Vitamin C, hyaluronic acid, and other beneficial ingredients. It’s designed to brighten skin, reduce the appearance of wrinkles and fine lines, and promote collagen production for a youthful complexion.
  3. Nutrivein Liposomal Vitamin C: Nutrivein’s Liposomal Vitamin C delivers Vitamin C in a highly bioavailable form, enhancing absorption and efficacy. This liquid supplement is easy to take and offers potent antioxidant benefits to support overall health and wellness.
  4. Garden of Life Vitamin Code Raw Vitamin C: Garden of Life’s Raw Vitamin C capsules contain whole food ingredients, including fruits and vegetables, providing a natural source of Vitamin C along with other nutrients and antioxidants. This product is ideal for those seeking a whole food-based supplement option.
  5. Thorne Research Vitamin C with Flavonoids: Thorne Research provides Vitamin C supplements combined with flavonoids for enhanced antioxidant support and immune function. Their products are formulated to deliver optimal bioavailability and efficacy.

Before starting any new supplement regimen, it’s essential to consult with a healthcare professional, especially for individuals with underlying health conditions or those taking medications. Additionally, consider choosing products from reputable brands with third-party testing and positive customer reviews to ensure quality and effectiveness.

Note: Always read product labels and follow recommended dosage instructions. Individual results may vary, and it’s advisable to incorporate Vitamin C-rich foods into your diet for overall health benefits.

Vitamin B – The Cellular Function Enhancer

Vitamin B

Vitamin B complex, which includes biotin (B7), B5, and B12, is necessary for energy production and cellular metabolism, all of which are critical for the growth of hair. Particularly well-known for its ability to fortify hair strands and stop hair breakage is biotin. Additionally, it promotes the synthesis of keratin, a protein that gives hair its structure. Leafy greens, eggs, nuts, and whole grains are good sources of vitamin B.

Possible side effects of Vitamin B, also known as B vitamins, can vary depending on the specific type of B vitamin and the dosage consumed. While B vitamins are essential for cellular function and overall health, excessive intake of certain B vitamins may lead to adverse effects. Here are some potential side effects associated with Vitamin B supplementation:

  1. Nervous System Effects: High doses of certain B vitamins, such as Vitamin B6 (pyridoxine), may cause neurological symptoms including numbness, tingling, or nerve damage, especially when consumed in excess over an extended period.
  2. Digestive Disturbances: Some individuals may experience gastrointestinal issues such as nausea, vomiting, diarrhea, or stomach cramps when taking high doses of B vitamins, particularly Vitamin B3 (niacin).
  3. Skin Reactions: Vitamin B supplements, particularly B3 (niacin), can cause skin flushing, itching, and redness, especially at higher doses. This side effect is often temporary but can be uncomfortable for some individuals.
  4. Liver Toxicity: Consuming excessive amounts of certain B vitamins, such as B3 (niacin), may lead to liver toxicity, characterized by elevated liver enzymes, liver damage, or hepatitis in rare cases.
  5. Blood Sugar Fluctuations: Vitamin B supplements, particularly B3 (niacin), may affect blood sugar levels, leading to fluctuations in glucose levels, especially in individuals with diabetes or insulin resistance.

It’s essential to consume B vitamins within recommended daily allowances and to avoid excessive supplementation without medical supervision. While B vitamins are generally considered safe when taken as directed, it’s important to be mindful of potential side effects, especially when taking high doses or combining multiple B vitamin supplements.

Individuals with underlying health conditions, pregnant or breastfeeding women, and those taking medications should consult with a healthcare professional before starting any new supplement regimen to ensure safety and efficacy.

Zinc – The Hair Follicle Strengthener


The mineral zinc is essential for preserving the health of the scalp and fortifying hair follicles. It assists in controlling sebum production, avoiding flakiness and dryness of the scalp, which can impede the growth of hair. Zinc also supports healthy hair follicles by assisting in tissue growth and repair. Shellfish, lean meats, legumes, and seeds are foods high in zinc.

Iron – The Hemoglobin Producer

Hemoglobin, which transports oxygen to all of the body’s cells, including hair follicles, is made possible only by iron. Sufficient amounts of iron guarantee appropriate blood flow to the scalp, stimulating hair development and mitigating hair loss. Anemia is a disorder linked to thinning hair and sluggish hair development that can be brought on by an iron shortage. Eating foods high in iron, such as spinach, lentils, chicken, and red meat, can help keep hair healthy.

Including iron-rich foods in your diet is essential for maintaining optimal hemoglobin levels and preventing iron deficiency anemia. Here are some foods that are excellent sources of iron:

  1. Poultry: Chicken and turkey are good sources of heme iron. Skinless, white-meat poultry is lower in fat and calories compared to dark meat.
  2. Seafood: Shellfish such as oysters, clams, and mussels are excellent sources of heme iron. Additionally, fish like salmon, tuna, and sardines provide iron along with heart-healthy omega-3 fatty acids.
  3. Tofu and Tempeh: Soy-based products like tofu and tempeh are good plant-based sources of iron, particularly for vegetarians and vegans. Choose varieties that are fortified with iron for an extra boost.
  4. Dark, Leafy Greens: Spinach, kale, Swiss chard, and collard greens are packed with non-heme iron, along with other essential nutrients like vitamin C and folate, which can enhance iron absorption.
  5. Fortified Foods: Certain fortified foods such as breakfast cereals, bread, and pasta contain added iron, making them convenient options to boost iron intake, especially for those with dietary restrictions.
  6. Nuts and Seeds: Almonds, cashews, pumpkin seeds, and sesame seeds are good sources of non-heme iron, as well as healthy fats, protein, and fiber.
  7. Dried Fruits: Raisins, apricots, prunes, and dried figs are concentrated sources of iron and make for convenient snacks or additions to cereals, salads, and trail mixes.
  8. Whole Grains: Quinoa, fortified rice, whole wheat bread, and oats are examples of whole grains that provide some iron, contributing to overall dietary intake.

Incorporating a variety of these iron-rich foods into your meals and snacks can help ensure an adequate intake of this essential mineral. Pairing iron-rich foods with sources of vitamin C, such as citrus fruits, bell peppers, or strawberries, can also enhance iron absorption. If you’re concerned about meeting your iron needs through diet alone, consider consulting with a healthcare professional or registered dietitian for personalized guidance.

Vitamin D – The Cell Growth Stimulator

VitaminD Fish oil

In order to stimulate hair development and encourage hair follicle cycling, vitamin D is essential. In order to maintain optimal hair follicle function, it helps regulate the expression of genes involved in hair growth and cycle. Lack of vitamin D has been connected to alopecia, a disorder that causes hair loss. Supplements, sun exposure, and fortified meals are good sources of vitamin D, which promotes healthy hair development.

While the primary source of Vitamin D is sunlight exposure, there are also several natural food sources that can contribute to your Vitamin D intake. Here are some examples:

  1. Fatty Fish: Fatty fish such as salmon, trout, mackerel, tuna, and sardines are excellent sources of Vitamin D. Consuming these fish a few times a week can help boost your Vitamin D levels significantly.
  2. Cod Liver Oil: Cod liver oil is extracted from the liver of cod fish and is one of the richest natural sources of Vitamin D. It’s available in liquid or capsule form and can be taken as a dietary supplement.
  3. Egg Yolks: Egg yolks contain small amounts of Vitamin D, making them a convenient and versatile source of this essential nutrient. Opt for pasture-raised or omega-3 enriched eggs for higher Vitamin D content.
  4. Mushrooms: Some varieties of mushrooms, particularly wild mushrooms exposed to sunlight or those that have been specifically treated with ultraviolet (UV) light, can contain significant amounts of Vitamin D2 (ergocalciferol).
  5. Fortified Foods: Certain foods are fortified with Vitamin D to help people meet their daily requirements. These include fortified dairy products like milk, yogurt, and cheese, as well as fortified plant-based alternatives like soy milk, almond milk, and orange juice.
  6. Fortified Cereals and Grains: Some breakfast cereals, oatmeal, and bread products are fortified with Vitamin D to enhance their nutritional value. Check the product labels to identify fortified options.
  7. Pork Liver: Pork liver is another natural source of Vitamin D, although it’s not as commonly consumed as other foods on this list. Incorporating pork liver into your diet occasionally can provide a boost of this essential nutrient.
  8. Cheese: Certain types of cheese, such as cheddar, Swiss, and mozzarella, contain small amounts of Vitamin D. While not as rich in Vitamin D as fatty fish or fortified foods, cheese can still contribute to your overall intake.

It’s important to note that Vitamin D levels can vary in natural food sources, and factors such as cooking methods and processing can affect the Vitamin D content. Additionally, individuals with limited sun exposure, darker skin tones, or specific dietary restrictions may benefit from Vitamin D supplementation to ensure adequate intake. If you’re concerned about your Vitamin D levels, consult with a healthcare professional for personalized advice and recommendations.


In conclusion, incorporating vitamins and minerals into your diet is essential for promoting healthy hair growth. Vitamin C aids in collagen synthesis and iron absorption, while vitamin B supports cellular function and keratin production. Zinc strengthens hair follicles, iron promotes oxygen circulation to the scalp, and vitamin D stimulates hair follicle cycling. By ensuring adequate intake of these nutrients through a balanced diet, you can support optimal hair health and growth.


Can taking vitamins alone prevent hair loss?

While vitamins play a crucial role in promoting hair health, addressing underlying causes of hair loss such as genetics, hormonal imbalances, and stress is also necessary for effective treatment.

Is it possible to overdose on vitamins and cause hair loss?

Excessive intake of certain vitamins, particularly vitamin A, can lead to hair loss. It’s essential to follow recommended daily allowances and consult with a healthcare professional before taking supplements.

How long does it take to see results from taking hair growth vitamins?

The timeline for seeing results from taking hair growth vitamins can vary depending on individual factors such as diet, overall health, and genetics. It may take several weeks to months before noticeable improvements in hair health are observed.

Are there any side effects associated with taking hair growth vitamins?

In some cases, excessive intake of certain vitamins or minerals can lead to adverse effects such as digestive issues, nausea, or allergic reactions. It’s important to follow recommended dosages and consult with a healthcare provider if experiencing any adverse effects.

Can hair growth vitamins be applied topically for better results?

While some hair growth vitamins are available in topical formulations such as serums or shampoos, their effectiveness may vary. Topical application may complement dietary intake but is unlikely to replace the benefits of internal supplementation.

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