Hair, skin, and nail vitamins are among the most popular supplements for enhancing appearance and promoting overall wellness. Many people take them hoping for stronger nails, glowing skin, or thicker hair. While these supplements are generally safe and well-tolerated, some users may experience mild side effects, especially if the formula contains high doses of certain vitamins or minerals. These effects can range from digestive discomfort to skin breakouts or fatigue. Most reactions are temporary and fade as the body adjusts, but they can still be bothersome for some. Understanding these side effects helps users make informed choices and recognise when their body may be signalling an imbalance or nutrient overload.
7 side effects of hair, skin, and nail supplements
According to a study published in the International Journal of Women’s Dermatology, skin, hair, and nail supplements, often marketed as “ingestible beauty” products, can pose potential health risks despite their growing popularity. The study revealed that many of these supplements contain excessive amounts of vitamins, minerals, herbs, hormones, and animal-derived compounds such as collagen and fish oils.
Because they are regulated as dietary supplements rather than drugs, manufacturers are not required to prove their safety or efficacy before marketing. The researchers cautioned that such products could lead to acute toxicities, allergic reactions, or long-term health risks, urging consumers to approach them with care and consult healthcare professionals before use.
1. Nausea or upset stomach
Some vitamins and minerals, particularly iron, zinc, and vitamin C, can irritate the digestive lining when taken without food. This often leads to nausea, stomach cramps, or a burning sensation in the upper abdomen. The discomfort can also be worsened by taking supplements on an empty stomach or alongside acidic drinks like coffee or orange juice.
2. Headaches or dizziness
Occasional headaches or light-headedness can occur when consuming excess amounts of fat-soluble vitamins, such as A, D, E, and K. These vitamins build up in body tissues over time, and high levels may temporarily affect blood pressure or cause dehydration. Some people also experience dizziness when starting supplements containing caffeine or herbal extracts marketed to “boost circulation.”
3. Skin reactions (Rashes or acne breakouts)
Ironically, supplements meant to improve your skin can sometimes make it worse. High doses of biotin (vitamin B7) or vitamin B12 may trigger acne-like breakouts, especially on the jawline and cheeks. This happens because biotin can interfere with vitamin B5 absorption, which helps regulate oil production. Others may develop mild rashes, itching, or redness due to allergic sensitivity to an ingredient, such as gelatin, soy, or added preservatives.
4. Changes in urine colour
Noticing bright yellow or neon-coloured urine after taking your vitamins? This is a common and harmless effect caused by the body excreting excess water-soluble vitamins, mainly vitamin B2 (riboflavin). Since your body only uses what it needs, the rest leaves through urine, giving it a distinct colour. While this isn’t a cause for concern, it can be surprising for first-time supplement users.
5. Fatigue or mood changes
Some people experience fatigue, irritability, or mood swings after starting hair, skin, and nails vitamins. This is often linked to an imbalance caused by excessive vitamin B6, niacin (B3), or zinc, which can temporarily alter neurotransmitter activity or blood sugar levels. Overstimulation of certain metabolic pathways may also leave you feeling drained rather than energised.
6. Digestive discomfort and bloating
Besides nausea, users sometimes report bloating, gas, or mild diarrhoea, particularly from collagen-based or multivitamin supplements. Ingredients such as hydrolysed collagen, gelatin, or artificial sweeteners may cause mild digestive upset in sensitive individuals. Over time, your gut may adapt, but persistent bloating could signal intolerance to an additive or filler.
7. Hair and nail texture changes
Occasionally, users may notice increased oiliness of the scalp, fragile nails, or even temporary hair shedding when starting a supplement. These effects can occur as the body adjusts to a sudden influx of nutrients, influencing keratin production and hormonal balance. Though temporary, it can be unsettling.
When to consult a doctor
Most mild side effects fade as your body adapts, but persistent or severe symptoms shouldn’t be ignored. You should stop using the supplement and seek medical advice if you experience:
Hair, skin, and nail vitamins can complement a healthy lifestyle, but they are not without risks. Side effects often arise from overuse, poor formulation, or individual sensitivities. To stay safe, always choose high-quality supplements, follow dosage recommendations, and pair them with a balanced diet. Remember, radiant skin, strong nails, and shiny hair begin with overall wellness, not just pills or capsules.
Disclaimer: This article is for informational purposes only and should not be considered medical advice. Please consult a healthcare professional before making any changes to your diet, medication, or lifestyle.
7 side effects of hair, skin, and nail supplements
According to a study published in the International Journal of Women’s Dermatology, skin, hair, and nail supplements, often marketed as “ingestible beauty” products, can pose potential health risks despite their growing popularity. The study revealed that many of these supplements contain excessive amounts of vitamins, minerals, herbs, hormones, and animal-derived compounds such as collagen and fish oils.
Because they are regulated as dietary supplements rather than drugs, manufacturers are not required to prove their safety or efficacy before marketing. The researchers cautioned that such products could lead to acute toxicities, allergic reactions, or long-term health risks, urging consumers to approach them with care and consult healthcare professionals before use.
1. Nausea or upset stomach
Some vitamins and minerals, particularly iron, zinc, and vitamin C, can irritate the digestive lining when taken without food. This often leads to nausea, stomach cramps, or a burning sensation in the upper abdomen. The discomfort can also be worsened by taking supplements on an empty stomach or alongside acidic drinks like coffee or orange juice.
2. Headaches or dizziness
Occasional headaches or light-headedness can occur when consuming excess amounts of fat-soluble vitamins, such as A, D, E, and K. These vitamins build up in body tissues over time, and high levels may temporarily affect blood pressure or cause dehydration. Some people also experience dizziness when starting supplements containing caffeine or herbal extracts marketed to “boost circulation.”
3. Skin reactions (Rashes or acne breakouts)
Ironically, supplements meant to improve your skin can sometimes make it worse. High doses of biotin (vitamin B7) or vitamin B12 may trigger acne-like breakouts, especially on the jawline and cheeks. This happens because biotin can interfere with vitamin B5 absorption, which helps regulate oil production. Others may develop mild rashes, itching, or redness due to allergic sensitivity to an ingredient, such as gelatin, soy, or added preservatives.
4. Changes in urine colour
Noticing bright yellow or neon-coloured urine after taking your vitamins? This is a common and harmless effect caused by the body excreting excess water-soluble vitamins, mainly vitamin B2 (riboflavin). Since your body only uses what it needs, the rest leaves through urine, giving it a distinct colour. While this isn’t a cause for concern, it can be surprising for first-time supplement users.
5. Fatigue or mood changes
Some people experience fatigue, irritability, or mood swings after starting hair, skin, and nails vitamins. This is often linked to an imbalance caused by excessive vitamin B6, niacin (B3), or zinc, which can temporarily alter neurotransmitter activity or blood sugar levels. Overstimulation of certain metabolic pathways may also leave you feeling drained rather than energised.
6. Digestive discomfort and bloating
Besides nausea, users sometimes report bloating, gas, or mild diarrhoea, particularly from collagen-based or multivitamin supplements. Ingredients such as hydrolysed collagen, gelatin, or artificial sweeteners may cause mild digestive upset in sensitive individuals. Over time, your gut may adapt, but persistent bloating could signal intolerance to an additive or filler.
7. Hair and nail texture changes
Occasionally, users may notice increased oiliness of the scalp, fragile nails, or even temporary hair shedding when starting a supplement. These effects can occur as the body adjusts to a sudden influx of nutrients, influencing keratin production and hormonal balance. Though temporary, it can be unsettling.
When to consult a doctor
Most mild side effects fade as your body adapts, but persistent or severe symptoms shouldn’t be ignored. You should stop using the supplement and seek medical advice if you experience:
- Ongoing nausea, vomiting, or severe stomach cramps
- Unusual fatigue or weakness
- Persistent acne or rashes
- Yellowing of the skin or eyes (a possible sign of liver stress)
- Difficulty breathing, swelling, or other signs of an allergic reaction
Hair, skin, and nail vitamins can complement a healthy lifestyle, but they are not without risks. Side effects often arise from overuse, poor formulation, or individual sensitivities. To stay safe, always choose high-quality supplements, follow dosage recommendations, and pair them with a balanced diet. Remember, radiant skin, strong nails, and shiny hair begin with overall wellness, not just pills or capsules.
Disclaimer: This article is for informational purposes only and should not be considered medical advice. Please consult a healthcare professional before making any changes to your diet, medication, or lifestyle.
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