Beauty really does start from within.
We spend hundreds of dollars on serums, creams, masks and treatments designed to make our skin look younger, our hair stronger and our nails healthier.
But there is another side of beauty that often gets overlooked: nutrition.
Your skin, hair and nails are living tissues that require protein, vitamins, minerals, essential fats and other nutrients to function properly. When your diet doesn’t provide enough of what your body needs, it can show up on the outside.
Dry or dull skin.
Brittle nails.
Hair that seems thinner or weaker.
A loss of elasticity.
Slower healing.
That doesn’t mean taking a handful of supplements will suddenly give you perfect skin. In fact, supplements work best when they’re filling a nutritional gap rather than trying to compensate for a poor diet.
So, if you’re wondering which beauty supplements are actually worth considering, I’ve ranked the eight featured in this guide from most useful to least important, based on their nutritional importance and the available evidence.
Important: This ranking is about their potential role in overall skin, hair and nail health—not a medical ranking of which nutrient is most important to the human body.
1. Collagen Peptides
The beauty supplement with some of the most interesting research behind it
If you’re specifically looking for a supplement aimed at skin ageing, hydration and elasticity, collagen peptides are probably the first one I’d investigate.
Collagen is the major structural protein in your skin. It helps give skin its structure, strength and elasticity, but collagen production naturally changes as we age.
This is where collagen supplements have become particularly popular.
Hydrolysed collagen peptides are broken down into smaller peptides that can be digested and absorbed. Research has investigated whether consuming these peptides can influence markers of skin health.
And the evidence is interesting—but not completely straightforward.
Several systematic reviews and meta-analyses have reported improvements in skin hydration and elasticity among people taking oral collagen. One review of 26 randomised controlled trials involving more than 1,700 participants found significant improvements in skin hydration and elasticity.
More recent research has also reported benefits, although the quality of the evidence varies. A 2025 meta-analysis found that results were much less convincing when researchers looked specifically at higher-quality or independently funded studies.
So collagen isn’t a magic anti-ageing pill—but it is one of the more interesting beauty supplements to keep an eye on.
Potential benefits
- Supports skin hydration
- May improve skin elasticity
- May reduce the appearance of some wrinkles
- Provides amino acids used in connective tissue
- May also support joints and connective tissue
What to look for
Look for hydrolysed collagen peptides or collagen hydrolysate.
Many studies have used somewhere between approximately 2.5–10 g per day, although there isn’t one universally established “beauty dose.”
Best food sources
You can also obtain collagen-related amino acids through a protein-rich diet, including:
- Bone broth
- Fish
- Chicken
- Eggs
- Meat
- Gelatin
- Other protein-rich foods
Heartcore verdict: ⭐⭐⭐⭐⭐
One of the more promising beauty-focused supplements, although the research isn’t perfect.
2. Vitamin C
The underrated beauty nutrient
If collagen is the building material, vitamin C is one of the nutrients your body needs to make collagen properly.
Vitamin C is essential for collagen biosynthesis and also functions as an antioxidant. It’s involved in wound healing and several other important processes throughout the body.
This makes vitamin C particularly interesting for anyone interested in healthy ageing.
And unlike some trendy beauty supplements, vitamin C isn’t simply a marketing invention. Your body actually requires it.
Potential beauty benefits
Vitamin C:
- Is required for collagen production
- Supports normal wound healing
- Acts as an antioxidant
- Helps protect cells from oxidative damage
- Supports normal skin structure
- Helps with absorption of iron from plant foods
Getting enough vitamin C through food should generally be the priority.
Best food sources
Think colourful fruits and vegetables:
- Capsicum
- Kiwi fruit
- Oranges
- Strawberries
- Berries
- Broccoli
- Tomatoes
- Brussels sprouts
You don’t necessarily need a high-dose vitamin C supplement if you’re eating plenty of these foods.
And more isn’t necessarily better.
For adults, the upper limit for vitamin C from food, drinks and supplements combined is 2,000 mg per day. High supplemental doses can cause diarrhoea, nausea and abdominal cramps.
Heartcore verdict: ⭐⭐⭐⭐⭐
A foundational nutrient for collagen production and overall health.
3. Omega-3 Fatty Acids
Think of omega-3s as nourishment for your skin from the inside
Omega-3 fatty acids aren’t traditionally marketed as a “beauty supplement” in the same way collagen or biotin are.
But they deserve a place on this list.
Omega-3s are essential fats involved in numerous processes throughout the body. EPA and DHA are found primarily in oily fish, while ALA is found in plant foods such as flaxseed, chia and walnuts.
Your skin is also a lipid-rich barrier, so getting enough healthy fats is an important part of maintaining normal skin function.
Interestingly, severe omega-3 deficiency can cause rough, scaly skin—but true deficiency is uncommon.
Potential benefits
Omega-3s may:
- Support normal skin barrier function
- Help maintain skin moisture
- Support a healthy inflammatory response
- Provide essential fatty acids
- Support overall cardiovascular and brain health
Best food sources
- Salmon
- Sardines
- Mackerel
- Herring
- Chia seeds
- Flaxseeds
- Walnuts
If you eat oily fish regularly, you may not need an omega-3 supplement.
One important point
Look at the label carefully.
“1,000 mg fish oil” does not necessarily mean 1,000 mg of EPA and DHA. The amount of EPA and DHA is what matters when comparing fish oil products.
Heartcore verdict: ⭐⭐⭐⭐½
A fantastic nutritional foundation, especially if your diet is low in oily fish.
4. Zinc
The mineral your skin can’t afford to overlook
Zinc is involved in hundreds of enzymatic processes throughout the body.
It’s important for:
- Immune function
- Protein synthesis
- DNA synthesis
- Cell division
- Wound healing
- Normal skin function
Zinc deficiency can affect the skin and can also contribute to hair loss, particularly when deficiency is significant.
But here’s the important distinction:
More zinc does not equal better skin or thicker hair.
If you’re already getting enough zinc, taking large amounts isn’t going to magically improve your hair.
Potential benefits
Adequate zinc intake supports:
- Normal skin health
- Wound healing
- Hair health when deficiency is present
- Normal nail growth
- Immune function
Food sources
- Oysters
- Beef
- Chicken
- Eggs
- Pumpkin seeds
- Chickpeas
- Nuts
- Dairy
Don’t overdo it
This is particularly important with zinc supplements.
The adult upper limit is 40 mg per day from all sources. Taking excessive amounts over time can interfere with copper absorption and cause other problems.
Heartcore verdict: ⭐⭐⭐⭐
Important—but supplementation makes the most sense when dietary intake is inadequate or deficiency is suspected.
5. Hyaluronic Acid
The hydration supplement
You’ve probably heard of hyaluronic acid in skincare.
It’s an ingredient found naturally in the body, including the skin and connective tissues, where it has an important role in hydration.
Most people know it as a topical skincare ingredient, but oral hyaluronic acid supplements have also been studied.
And this is one area where the research is becoming increasingly interesting.
A 2025 meta-analysis of seven randomised controlled trials found that oral hyaluronic acid was associated with improvements in skin hydration, elasticity and wrinkle depth, although the researchers noted that larger and more robust studies are still needed.
A separate randomised controlled trial also found improvements in skin hydration after oral hyaluronic acid supplementation.
Potential benefits
- Supports skin hydration
- May improve elasticity
- May reduce the appearance of fine lines
- May support skin structure
The catch
It’s not essential.
Unlike vitamin C, vitamin D or zinc, hyaluronic acid isn’t a vitamin or mineral that you need to obtain from your diet to prevent deficiency.
Think of it more as an optional beauty-focused supplement.
Heartcore verdict: ⭐⭐⭐⭐
Interesting evidence for skin hydration, but definitely optional.
6. Vitamin D + Vitamin K2
More about whole-body health than beauty
This is one I’d slightly reposition from the Pinterest graphic.
Vitamin D is extremely important—but I wouldn’t call it a traditional “beauty supplement.”
Vitamin D is involved in calcium absorption, bone health, muscle function and immune function.
And that’s actually why it’s important for women as they get older.
Healthy bones, muscles and overall health are far more important than simply chasing younger-looking skin.
Vitamin K is also important for blood clotting and bone metabolism.
However, the evidence doesn’t justify saying that taking vitamin D + K2 automatically gives you better skin, promotes hair growth or boosts collagen.
Potential benefits of adequate vitamin D
- Supports bone health
- Supports calcium absorption
- Supports normal muscle function
- Supports immune function
Food sources
Vitamin D can be found in:
- Fatty fish
- Egg yolks
- Fortified foods
Your body can also make vitamin D when skin is exposed to sunlight.
A note about K2
K2 is a form of vitamin K. Vitamin K is important for bone metabolism and blood clotting, but supplementation isn’t automatically necessary for everyone because vitamin K deficiency is uncommon.
And if you’re taking warfarin or another medication affected by vitamin K, speak to your doctor before changing your vitamin K intake.
Heartcore verdict: ⭐⭐⭐½
Extremely important for overall health, but not primarily a beauty supplement.
7. Vitamin E
Your body’s antioxidant protector
Vitamin E is a fat-soluble antioxidant that helps protect cells from oxidative damage.
It’s naturally found in foods including nuts, seeds and vegetable oils.
Because oxidative stress is involved in the ageing process, vitamin E has an obvious appeal in the beauty world.
But again, there’s a big difference between getting enough vitamin E and taking large amounts of vitamin E in the hope of looking younger.
Potential benefits
Vitamin E:
- Acts as an antioxidant
- Supports normal immune function
- Helps protect cells from oxidative damage
- Supports normal cellular function
Best food sources
- Almonds
- Sunflower seeds
- Hazelnuts
- Avocado
- Sunflower oil
- Vegetable oils
- Spinach
Should you supplement?
Probably not automatically.
Most people should aim to get vitamin E from food, and high-dose supplementation isn’t something I’d recommend simply for “anti-ageing.”
Vitamin E is fat-soluble, meaning it can accumulate in the body, and high-dose supplements can have downsides.
Heartcore verdict: ⭐⭐⭐
Important nutrient, but food should generally come first.
8. Biotin
The beauty supplement with the biggest reputation—and perhaps the most overhyped
Biotin is probably one of the first supplements people think of when someone mentions hair, skin and nails.
It’s vitamin B7, and it plays a role in energy metabolism and several biochemical processes.
Severe biotin deficiency can cause problems including hair thinning/loss, skin rashes and brittle nails.
But here’s where the beauty industry sometimes gets ahead of the science.
If you’re not deficient in biotin, there is limited evidence that taking large amounts will suddenly make your hair grow faster or thicker.
The NIH notes that there is little scientific evidence supporting biotin supplements for improving hair, skin and nails in people who aren’t deficient.
There have been some small studies showing improvements in brittle nails, but the evidence isn’t strong enough to say everyone needs a biotin supplement.
Potential benefits
Adequate biotin:
- Supports normal energy metabolism
- Supports normal skin function
- Supports normal hair health
- Supports normal nail health
Here’s something important about biotin
High-dose biotin can interfere with certain laboratory tests, including thyroid hormone tests and other diagnostic tests.
That means you should always tell your doctor or pathology provider that you’re taking biotin, particularly if you’re taking a high-dose beauty supplement.
Heartcore verdict: ⭐⭐½
Important if you’re deficient—but one of the most over-marketed beauty supplements.
So What Should You Actually Take?
Here’s where I think the beauty supplement conversation needs to become much more realistic.
You don’t need to swallow eight different capsules every morning to have beautiful skin.
In fact, the foundation matters far more than the supplement shelf.
Your real beauty foundation
1. Eat enough protein
Collagen is a protein, and your body needs amino acids to build and repair tissues.
Prioritise foods such as:
- Eggs
- Fish
- Chicken
- Greek yoghurt
- Lean meat
- Tofu
- Legumes
- Seafood
2. Eat plenty of colourful plants
Vitamin C, antioxidants and other phytonutrients are abundant in fruits and vegetables.
Think:
berries + citrus + leafy greens + capsicum + tomatoes + cruciferous vegetables.
3. Don’t fear healthy fats
Your diet needs essential fatty acids.
Include:
- Extra-virgin olive oil
- Avocado
- Nuts
- Seeds
- Oily fish
4. Stay hydrated
No supplement can compensate for consistently poor hydration.
5. Sleep
This one doesn’t come in a capsule.
But it matters.
Your body carries out enormous amounts of repair and regulation while you sleep.
6. Protect your skin from UV exposure
If your goal is healthy-looking skin as you age, sun protection is one of the most important things you can do.
A supplement cannot replace sunscreen, shade, protective clothing and sensible sun exposure.
The Bottom Line
The phrase “beauty starts from within” sounds like a cliché, but there is some truth behind it.
Your skin, hair and nails reflect what’s happening throughout your body.
But that doesn’t mean you need an enormous collection of beauty supplements.
If I were creating a sensible beauty-from-within routine, I’d start with the basics:
Adequate protein.
Plenty of colourful whole foods.
Healthy fats.
Enough vitamin C.
Adequate zinc.
Omega-3-rich foods.
Good hydration.
Quality sleep.
Stress management.
And daily sun protection.
Then supplements can be used strategically when there is a genuine nutritional gap—or when there is reasonable evidence for a specific goal.
And that’s the important distinction:
You don’t need more supplements.
You need the right nutrients.
Beauty isn’t about trying to force your body to look younger.
It’s about giving your body the raw materials it needs to function, repair and thrive.
A note before you start
Supplements aren’t automatically safe just because they’re labelled “natural.” Some can interact with medications, affect blood tests or cause problems at high doses. Zinc, for example, can interfere with copper absorption when taken excessively, while high-dose biotin can interfere with laboratory testing.
If you’re pregnant, breastfeeding, taking medication, have a medical condition, or are considering high-dose supplementation, speak with your doctor or pharmacist first.
This article is for general educational purposes and isn’t a substitute for individual medical advice.
