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Skincare, explained
Skincare Science · Advertorial

Why more women over 50 are trading a shelf of products for one peptide serum

Fine lines, firmness, dryness, and dark spots usually mean four different products. Here’s what peptides actually do, and a closer look at one serum that combines them with hyaluronic acid and vitamin C.

By The Novel Serum EditorsUpdated October 29, 20266 min read
Smiling woman holding a bottle of Total Package Serum
Image: Sun Coast Sciences
1Fine linesCreases around the eyes, mouth, and forehead
2Loss of firmnessA softer jawline and cheeks
3DrynessSkin that looks thinner and less plump
4Uneven toneDark spots and dullness
Chapter 1

Four changes, four products

After 50, most women notice the same handful of changes: finer lines that don’t fade by lunchtime, a softer jawline, skin that looks thinner and drier, and spots that weren’t there before.

The usual answer is a product for each one. A wrinkle cream. A firming serum. A hyaluronic acid booster. A vitamin C serum. Before long, the bathroom shelf is crowded, the routine takes ten minutes, and the monthly bill adds up.

That’s why “multi-tasking” serums have become one of the fastest-growing corners of skincare: formulas that put several well-studied ingredients into one bottle.

The idea is simple: fewer steps, and ingredients that each do a different job.
Chapter 2

What peptides actually do

Peptides are short chains of amino acids, the building blocks of proteins like collagen. In skincare, certain peptides are used because they act as “messengers” at the skin’s surface. Some are used to soften the look of expression lines. Others are used to improve the look of firmness and texture over time.

They’re popular with mature skin because they tend to be gentle. Unlike retinol, peptides rarely cause the redness and peeling that make many women give up after a week.

Worth knowing: peptide results are gradual. Most studies on these ingredients measure changes over weeks of twice-daily use, and they work best alongside daily sunscreen.
Chapter 3

A closer look: Total Package Serum

Bottle of Total Package Serum by Sun Coast Sciences
Seller: Sun Coast Sciences

Three peptides, hyaluronic acid, and vitamin C in one serum

Total Package Serum is a daily face serum from Sun Coast Sciences, designed for mature skin. The company says it’s formulated to address all four of the changes above at once, so it can stand in for several separate products.

3 peptidesHyaluronic acidVitamin CMade in the U.S., per the brandNot tested on animals

According to the company, the formula was developed with Dr. Mark Rosenberg, a physician who serves as its chief medical advisor, and it’s made in a GMP-certified facility in the United States with third-party testing on every batch.

Chapter 4

The five key ingredients

Here are the five actives the company highlights, and what each is generally used for in skincare:

Peptide
ArgirelineAcetyl hexapeptide-8A peptide widely used in skincare to soften the look of expression lines around the eyes and forehead.
Peptide
Matrixyl 3000Palmitoyl tripeptide-1, palmitoyl tetrapeptide-7A peptide pair used in anti-aging products to improve the look of wrinkles and skin firmness.
Peptide
Matrixyl Synthe’6Palmitoyl tripeptide-38A newer peptide used to help smooth the look of deeper lines and support a firmer-looking surface.
Hydrator
Hyaluronic acidLow molecular weight, per the brandA humectant that draws in and holds water, so skin looks plumper and feels softer.
Brightener
Stay-CSodium ascorbyl phosphateA stable vitamin C derivative used to help skin look brighter and more even in tone.
Total Package Serum bottle with fresh orange slices
Image: Sun Coast Sciences
Total Package Serum next to several separate skincare bottles it is designed to replace
Image: Sun Coast Sciences

The seller cites published studies on these ingredients. Those studies tested the individual ingredients, not this finished serum, so your results will depend on the full formula and how consistently you use it. The company lists a full ingredient list on the packaging.

Check today's price Opens the seller’s official website
Chapter 5

How to use it

  1. Morning and nightThe brand recommends twice-daily use for best results.
  2. A few pumpsOne for the forehead, one for each cheek, and one or two along the jawline.
  3. Apply it firstUse it as the first layer, under moisturizer, sunscreen, and makeup.
  4. Neck, chest & hands tooThe company says it can be used wherever skin shows signs of aging.
Before you start: patch-test on a small area for a day or two, especially if your skin is sensitive. Keep using a broad-spectrum sunscreen every morning. If you’re pregnant, nursing, or under a dermatologist’s care, check with your doctor first.
Chapter 6

What to expect, and when

Here’s how the company describes the timeline with twice-daily use. Results vary from person to person.

First usesSkin can look more radiant and feel hydrated, according to the brand.
Around 2 weeksThe company says more visible changes in smoothness and tone typically begin.
About 3 monthsThe brand describes this as the point of fullest results with continued use.

A serum won’t do what an in-office procedure does, and no cosmetic product stops skin from aging. What a well-formulated serum can do is help skin look smoother, firmer, brighter, and more hydrated over time, especially as part of a simple routine you actually stick with.

Where to get it

Sold online by Sun Coast Sciences

Total Package Serum is sold directly on the seller’s website. One bottle is a 30-day supply when used as directed, per the brand.

  • 365-day money-back guarantee, according to the seller, even if you’ve used the bottle. Read the refund terms before you order.
  • Subscription is optional: the checkout offers a subscribe-and-save option. Choose “One-Time Purchase” if you don’t want recurring orders.
  • Customer service: Sun Coast Sciences lists 1-888-281-6816 and mail@suncoastsciences.com.
Check today's price

Offers and availability are set by the seller and may change at any time. Check the seller’s site for current details and terms.

Quick answers

Questions readers ask

Can it really replace my other products?

The company designed it to cover what a wrinkle serum, firming serum, hydrating serum, and vitamin C serum each do. You’ll still want a daily sunscreen, and you may still like a moisturizer on top.

Is it OK for sensitive skin?

The brand says it’s suitable for all skin types, including sensitive skin. Everyone reacts differently, though, so patch-test first and stop if you notice irritation.

Is this the same as Botox or fillers?

No. It’s a topical cosmetic serum, not an injectable or medical treatment. It works on the look and feel of the skin’s surface, and results are gradual.

How long does a bottle last?

About 30 days with twice-daily use, according to the company.

Is this page an ad?

Yes. This is an advertorial, and we may earn a commission if you buy through the links on this page. Product details come from the seller and haven’t been independently tested by us.

Check today's price Opens yourtotalskin.com, the seller’s official website

Sources: product name, ingredients, directions, guarantee, and timeline are taken from the seller’s website at the time of writing. General skincare information reflects widely published dermatology guidance and is not medical advice.