The Ultimate Guide to Body Firming Ingredients That Work

It’s possible to tone and tighten your body with the right skincare routine. While changes to your body’s composition (such as muscle growth) happens in the gym, your skin plays a huge role in how toned your body appears.

In this article, we cover why skin loses firmness over time, the most effective body firming ingredients to look for, and how to build a skincare routine that tightens skin over time.

June 4^th, 2025

From BIOTHERM

Why skin loses firmness over time

As we age, our skin loses firmness – both on our face and body. Why? Our body produces less collagen and elastin as we grow older: two essential elements of skin regeneration. Without enough collagen and elastin, our skin starts sagging and the signs of aging appear.

Other factors can also accelerate this process, such as an unhealthy lifestyle, stress, and sun damage.

That’s why it’s important to look for body care ingredients that promote collagen production to prevent skin sagging.

Keep reading to discover what those firming ingredients are:

Collagen-boosting ingredients

As we mentioned, your skin starts slowing down its collagen production as we get older, which contributes to flabby skin on your body. Collagen is a protein that maintains your skin structure and keeps it firm and bouncy.

The good news? You can increase collagen production by using collagen-boosting actives, such as algae extract, peptides, vitamin C, and retinol.

These three superstar ingredients are often found in body firming skincare products because of their anti-aging properties. Look for them in firming creams and firming body oils, and use these products regularly to improve your skin tone, texture, and tightness.

For example, our Collagen Fit body care line features Collagen Peptides fraction and our signature Biotech Plankton™ to tone and improve skin elasticity on the body. The Collagen Fit Body Milk is fast-absorbing and hydrating, with instant toning effects. The Collagen Fit Body Cream is a richer, deeply moisturizing formula that gives toned and bouncy skin with up to 100 hours of hydration.

Barrier-building ceramides

Ceramides are lipids that hold skin cells together. Without them, our skin isn’t able to keep moisture in, leading to dryness, dullness, and sagging. Hydration is an essential element in maintaining firm, tight skin – it improves plumpness and radiance.

Look for ceramides in your body care products to strengthen your skin barrier, get long-lasting hydration, and improve the appearance of sagging skin. Pair this ingredient with hyaluronic acid and glycerin for the ultimate hydration powerhouse.

Other powerhouse body firming ingredients to look for

While collagen-boosting actives and ceramides are the two of the most effective skin firming ingredients, look for these other body care ingredients too for faster results:

Hyaluronic acid

Hyaluronic acid is an ultra-hydrating ingredient that combats skin sagging by plumping the skin and retaining moisture for longer.

Niacinamide

Niacinamide is a popular skincare ingredient that’s been proven to improve skin tone, texture, and elasticity. It has skin regenerating properties, making it a suitable choice for many skin types – from anti-aging to acne-prevention.

Caffeine

You may be thinking… caffeine? In skincare? Just like your morning coffee, caffeine can temporarily “awaken” the skin, brightening and toning in the process. It’s often added to body firming skincare products because of its immediate impact on skin tone and texture. For example, our Collagen Fit Body Milk features caffeine and other toning ingredients to wake up your skin.

Biotech Plankton™

Biotech Plankton™ is Biotherm’s signature regenerating active that supports skin renewal and resilience. It contains over 30 skin-saving nutrients that hydrate, restore, and protect the skin – both on the face and body. That’s why we feature this superstar ingredient in all of our products! For example, the is a firming body oil that features our patented Biotech Plankton™ to target stretch marks and improve elasticity.

How to build a daily body firming skincare routine

Now that you know what skincare ingredients to look out for, it’s time to build the best daily body firming skincare routine to get toned, radiant skin in no time:

1. Cleanse your skin in the shower or bath with a hydrating body wash, such as the Oil Therapy Huile de Douche.
2. A few times a week, use a to remove dead skin cells. This reduces dullness, which can exaggerate the appearance of sagging skin.
3. Pat your skin dry once you’re out of the shower or bath. Then apply the Collagen Fit Body Milk to hydrate and tone skin instantly for the day ahead.
4. Pair it with dry brushing or body massage tools to promote circulation and better absorption of your skincare products.
5. In the evening before bed, apply the Collagen Fit Body Cream for deep hydration and skin toning overnight.

Follow this routine consistently day and night to see the best results.

And that’s it! As you can see, it’s possible to firm and tone the skin on your body with the right firming ingredients and toning body routine. Pair this skincare routine with a healthy lifestyle and regular exercise for the best results.