What It Is 

HA is a sugar molecule your skin naturally contains. In skincare, it mainly works as a humectant— helping draw water into the upper layers of skin and hold onto it.

Where It Comes From

Most skincare HA is made via biofermentation(lab-made, not extracted from anything questionable).

Why It Became Famous

It gives that immediate plump, bouncy look — especially when skin is dehydrated — and it’s easy to add into everything from toners and serums to creams and cushions.

What It Actually Does

Boosts hydration(especially short-term) and smooths the skin’s surface temporarily plumps fine dehydration lines(not the same as erasing wrinkles)

• Works best when it’s not solo: HA + moisturizer = proper comfort

How To Use It (So It Doesn’t Feel Pointless)

• Apply after cleansing, before creams/oils.
  
• Follow with a moisturiser to seal in the hydration (this is where people go wrong).
  
• You can apply on slightly damp skin, but you don’t have to — the “must be damp or it will suck moisture out of your face” thing is overplayed. If damp application feels nicer and reduces tackiness, do it.
  

Best For

Tight, thirsty, dull, dehydrated skin — including oily skin that’s dehydrated (yes, it exists).

Watch-Outs

• Sticky/pilling usually means too much product, or you didn’t top with moisturiser.
  
• In very dry climates, pairing HA with a richer moisturiser is non-negotiable.

What It Is 

Niacinamide is Vitamin B3 in a skin-friendly form. It’s one of the rare ingredients that genuinely does several useful things at once.

Where It Comes From

It’s a well-studied vitamin derivative used in both medicine and skincare — not a trendy extract that showed up last week.

Why It Became Famous

Because it tackles the modern “everything problem”: uneven tone, oiliness, redness, barrier stress, and post-acne marks — and it generally layers well with other ingredients.

What It Actually Does

Helps fade dark spots by reducing melanin transfer, strengthens the skin barrier (boosting ceramides).

• Helps with redness and oil thanks to anti-inflammatory and sebum-regulating effects

How To Use It Well

Start with once daily, then increase to twice daily if your skin stays calm. If you’re sensitive, go for lower-to-mid strengths first — higher percentages can irritate a small number of people. It layers easily: use it after hydrating steps(like HA) and before moisturizer.

Can You Use It With Vitamin C?

Yes. The idea that they “cancel each other out” is mostly aboutstability in the bottle over time, not mixing them on your face in real life.

Best For

Uneven tone, visible pores, oiliness, redness, irritation, post-acne marks.

Watch-Outs

Flushing or tingling can happen (often formula-dependent). If it stings or persists, stop. And don’t stack multiple niacinamide products, then blame niacinamide for being “too strong”.

What They Are

Peptides are short chains of amino acids — basically tiny “signals” that can encourage skin to behave in certain ways (depending on the peptide).

Where They Come From

They’re typically synthetic(made for stability and performance). Different peptides do different jobs, which is why “peptides work” is both true and slightly vague.

Why They Became Famous

Not everyone wants retinoids, and peptides offer a gentler route to firmer-looking skin — especially in well-formulated serums and creams.

What They Actually Do (When Well-Formulated)

Some signal peptides support collagen-related activity, which can improve the look of elasticity over time

• Certain peptides (like palmitoyl peptides & copper peptides) have evidence for improving signs of aging in controlled settings — but results depend on the specific peptide and the formula

How To Use Them

• Use nightly, or morning and night if your routine is simple.
  
• Apply after lighter serums (like HA), before moisturiser — unless your peptide product is your moisturiser.
  

Best For

Early lines, loss of bounce, “my skin feels a bit less springy than it used to” energy.

Watch-Outs

Peptides are not one ingredient — they’re a category. A “peptide cream” can be brilliant or basically just a nice moisturiser with a good label. (Read the INCI. Or let someone else do it for you.)