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PDP Image of the No. 1 Serum , 30ml / 1.0 fl oz

Model with a swipe of the No. 1 Serum across the cheek , 15ml / 0.5 fl oz , 30ml / 1.0 fl oz and 2pack 15ml / 1.0 fl oz

Stack of No1 Serum 15ml / 0.5 fl oz , 30ml / 1.0 fl oz and 2pack 15ml / 1.0 fl oz

Image of model holding the No. 1 Serum bottle and applying a swipe of product , 15ml / 0.5 fl oz , 30ml / 1.0 fl oz and 2pack 15ml / 1.0 fl oz

No. 1 Serum - Vitamin C

$140

1735 reviews

The Zoe Report Best Vitamin C

Glamour Best Brightening Serum

Size: 30ml / 1.0 fl oz

15ml / 0.5 fl oz

30ml / 1.0 fl oz

One-Time Purchase

Subscribe and get 15% off*

1

The MUTHA No. 1 Serum is a clinically tested, do-it-all vitamin C serum that creates healthier skin with ingredients you can trust. Its advanced, potent formula features MUTHALOAD® Core Technology, which includes four molecular weights of Hyaluronic Acid, Niacinamide, and Rice Kefiran.

Our bio-fermented blend allows its clinically-proven, effective ingredients to be absorbed easily and enhance results. TETRAHEXYLDECYL ASCORBATE (THD) — a stabilized form of Vitamin C shown to be 50x more effective than L-Ascorbic Acid — helps reduce pigmentation and increase collagen production. Hyaluronic acid and niacinamide work to hydrate, balance, and protect the skin barrier.

The No. 1 Serum is your complete protecting, hydrating, and repairing treatment.

97% Natural Origin. Dermatologist and Allergy tested. For all skin types, including sensitive skin. Never tested on animals.

Pairs well with

Up All Night Eye Cream

No. 1 Serum - Vitamin C

$140

1735 reviews

The Zoe Report Best Vitamin C

Glamour Best Brightening Serum

Size: 30ml / 1.0 fl oz

15ml / 0.5 fl oz

30ml / 1.0 fl oz

One-Time Purchase

Subscribe and get 15% off*

1

The MUTHA No. 1 Serum is a clinically tested, do-it-all vitamin C serum that creates healthier skin with ingredients you can trust. Its advanced, potent formula features MUTHALOAD® Core Technology, which includes four molecular weights of Hyaluronic Acid, Niacinamide, and Rice Kefiran.

Our bio-fermented blend allows its clinically-proven, effective ingredients to be absorbed easily and enhance results. TETRAHEXYLDECYL ASCORBATE (THD) — a stabilized form of Vitamin C shown to be 50x more effective than L-Ascorbic Acid — helps reduce pigmentation and increase collagen production. Hyaluronic acid and niacinamide work to hydrate, balance, and protect the skin barrier.

The No. 1 Serum is your complete protecting, hydrating, and repairing treatment.

97% Natural Origin. Dermatologist and Allergy tested. For all skin types, including sensitive skin. Never tested on animals.

Pairs well with

Up All Night Eye Cream

Real People,
Real Results

96%

agreed skin was brighter and more radiant

93%

saw improved skin texture

99%

agreed skin was bouncier and more plump

90%

agreed that skin was left feeling soft and smooth

*based on a consumer panels conducted on 33 subjects over an 8-week period

Real People, Real Results

96%

agreed skin was brighter and more radiant

93%

saw improved skin texture

99%

agreed skin was bouncier and
more plump

90%

agreed that skin was left feeling
soft and smooth

*based on a consumer panels conducted on 33 subjects over an 8-week period

How to Use

Apply 1-2 pumps of the No. 1 Serum in the morning and evening to dry, clean skin on the face, neck, and décolletage. Use the No. 1 Serum by itself or follow with a moisturizer like the MUTHA Face Oil or Cream.

How to Use

Apply 1-2 pumps of the No. 1 Serum in the morning and evening to dry, clean skin on the face, neck, and décolletage. Use the No. 1 Serum by itself or follow with a moisturizer like the MUTHA Face Oil or Cream.

GET PUMPED

We’re always looking to make things better, so we’ve upgraded the packaging for our full-sized No. 1 Serum to a sealed, easy-to-use pump.

VITAMIN C PRESERVATION

We use THD, a stabilized form of Vitamin C, and limit added preservatives. This pump helps preserve the Vitamin C even longer and protect it from oxidation.

THE PERFECT AMOUNT

The No.1 Serum is packed with rich seed oils and hyaluronic acid—a little goes a long way. This pump dispenses the perfect amount.

STAYS FRESHER, LONGER

Larger product sizes take longer to use, so reducing air exposure over time is more important. Using a pump rather than a dropper helps keep your Serum fresh.

GET PUMPED

We’re always looking to make things better, so we’ve upgraded the packaging for our full-sized No. 1 Serum to a sealed, easy-to-use pump.

VITAMIN C PRESERVATION

We use THD, a stabilized form of Vitamin C, and limit added preservatives. This pump helps preserve the Vitamin C even longer and protect it from oxidation.

THE PERFECT AMOUNT

The No.1 Serum is packed with rich seed oils and hyaluronic acid—a little goes a long way. This pump dispenses the perfect amount.

STAYS FRESHER, LONGER

Larger product sizes take longer to use, so reducing air exposure over time is more important. Using a pump rather than a dropper helps keep your Serum fresh.

REASONS TO LOVE

DO IT ALL, LIKE YOUR MUTHA

It's a serum that does it all, loaded with clinically proven, bio-fermented ingredients that nourish and soothe the skin. It's made with gentle but effective actives designed to provide antioxidant benefits and treat imperfections like dark spots and fine lines. Simplify your routine with a serum that hydrates, treats, and protects in one step.

4x THE HYALURONIC ACID

The No. 1 Serum contains four molecular weights of Hyaluronic Acid, while most popular serums only have two! This superstar ingredient deeply hydrates and plumps the skin, and helps strengthen the skin barrier against damage and transepidermal water loss.

STABLE FORM OF VITAMIN C

The No. 1 Serum is formulated with a stabilized form of Vitamin C— Tetrahexyldecyl Ascorbate (THD) — that has been shown to 50x more effective than L-Ascorbic Acid, a widely popular Vitamin C option. This much more stable form of Vitamin C helps with preserving the potency of associated benefits including the reduction of dark spots and antioxidant properties.

MUTHALOADED WITH BENEFITS

MUTHALOAD Core Technology is an advanced formula designed to nourish, balance, soothe and protect the skin barrier with hyaluronic acid, niacinamide, rice peptides, and rice kefiran.

REASONS TO LOVE

DO IT ALL, LIKE YOUR MUTHA

It's a serum that does it all, loaded with clinically proven, bio-fermented ingredients that nourish and soothe the skin. It's made with gentle but effective actives designed to provide antioxidant benefits and treat imperfections like dark spots and fine lines. Simplify your routine with a serum that hydrates, treats, and protects in one step.

STABLE FORM OF VITAMIN C

The No. 1 Serum is formulated with a stabilized form of Vitamin C — Tetrahexyldecyl Ascorbate (THD) — that has been shown to 50x more effective than L-Ascorbic Acid, a widely popular Vitamin C option. This much more stable form of Vitamin C helps with preserving the potency of associated benefits including the reduction of dark spots and antioxidant properties.

4x THE HYALURONIC ACID

The No. 1 Serum contains four molecular weights of Hyaluronic Acid, while most popular serums only have two! This superstar ingredient deeply hydrates and plumps the skin, and helps strengthen the skin barrier against damage and transepidermal water loss.

MUTHALOADED WITH BENEFITS

MUTHALOAD Core Technology is an advanced formula designed to nourish, balance, soothe and protect the skin barrier with Hyaluronic Acid, Niacinamide, Rice Peptides, and Rice Kefiran.

Clinically Proven Results

100%

saw significant reduction in fine lines and wrinkles after 8 weeks of use*

100%

showed significant improvement in skin firmness and elasticity after 4 weeks of use*

79%

showed improvement in dark spots and hyperpigmentation after 8 weeks of use*

100%

agreed the look of pores and blemishes are reduced

* based on clinical study on 33 subjects over an 8-week period via expert grading and instrumentation

Clinically Proven Results

100%

saw significant reduction in fine lines and wrinkles after 8 weeks of use*

100%

showed significant improvement in skin firmness and elasticity after 4 weeks of use*

79%

showed improvement in dark spots and hyperpigmentation after 8 weeks of use*

100%

agreed the look of pores and blemishes are reduced

* based on clinical study on 33 subjects over an 8-week period via expert grading and instrumentation

Hear from our
No. 1 fans

Hear from our No. 1 fans

PRESS

VOGUE

Hydrate, Lift, and Brighten Your Complexion With 2023’s Best Face Serums

"The MUTHA No.1 serum is the perfect combination of hydrators, actives, antioxidants, and skin nourishers to leave skin conditioned, balanced, restored, and protected!"

HARPER'S BAZAAR

Best Newcomer

"Sun spots, pigmentation and dryness don’t stand a chance against this antioxidant-packed serum."

VOGUE

2023’s Best Face Serums for Your Skin, According to Experts

"The MUTHA No.1 serum is the perfect combination of hydrators, actives, antioxidants, and skin nourishers to leave skin conditioned, balanced, restored and protected!"

READ

HARPER'S BAZAAR

The Harper's Bazaar Best Of Beauty Awards 2022 winners

"Best Newcomer: Mutha No. 1 Serum Sun spots, pigmentation and dryness don’t stand a chance against this antioxidant-packed serum."

READ

The Zoe Report

The 26 Best New Skin Care Products Of 2021

"It leaves my skin so freakin’ smooth, like soft, plump baby skin...For anyone looking to use one serum morning and night, this is number one. So happy to add it to my skin care lineup."

READ