The Proof

We do not rely on a single measurement to understand how skin changes. The Fix is evaluated through multi-method clinical testing, measuring objective shifts in wrinkle depth, texture, hydration, elasticity, barrier function, and collagen structure.

Every test is published below in full. Not cherry-picked claims, but the complete studies. You will find our reports, raw ingredient dossiers, and multi-lab UVA and UVB certifications. We went far beyond the legal baseline and invested heavily in additional testing, which is genuinely expensive to do, because the industry has earned your scepticism, particularly when it comes to SPF.

We share every unedited study to answer the only question that matters: does this really work? If we are telling you this 3 Step System is all you need, here is the proof.

Key Testing Protocols

Independent Third Party Clinical Trial (Cardiff)

View:
AFTER Ultrasound - Skin Density BEFORE
Ultrasound - Skin Density

Ultrasound - Skin Density

Measures skin density beneath the surface using high-frequency ultrasound. A 22 MHz probe scans the dermis to assess its structure and density, providing an objective measurement of changes in skin density over time.

1 month
Clinically proven to increase skin density by 15% Up to 31% increase in skin density*
2 month
Clinically proven to increase skin density by 11% Up to 26% increase in skin density*
3 months
Clinically proven to increase skin density by 13% Up to 25% increase in skin density*
POSITIVE RESPONDERS OVER TIME
82% of participants showed increased skin density after 1 month.
Results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY

Corneometer® Skin Hydration

Measures skin hydration at the surface. The Corneometer® detects changes in the skin’s moisture levels, with higher readings indicating better hydration. Measurements are taken at multiple points across both sides of the face to provide an objective assessment of skin moisturisation.

INCREASE IN SKIN HYDRATION
1 MONTH
Clinically proven to increase skin hydration by 12% Up to 36% increase in skin hydration*
2 MONTHS
Clinically proven to increase skin hydration by 21% Up to 34% increase in skin hydration*
3 MONTHS
Clinically proven to increase skin hydration by 15% Up to 37% increase in skin hydration*
POSITIVE RESPONDERS OVER TIME
65% of participants showed increased skin hydration after 1 month
Results Explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY

Tewameter® Skin Barrier Function

Measures water loss through the skin’s surface. The Tewameter® detects changes in transepidermal water loss (TEWL), providing an objective measure of skin barrier function and moisture retention. 

Improvement in skin barrier function
1 hour
Clinically proven to improve skin barrier function by 4% Up to 13% improvement in skin barrier function*
1 month
Clinically proven to improve skin barrier function by 4% Up to 25% improvement in skin barrier function*
2 months
Clinically proven to improve skin barrier function by 9% Up to 21% improvement in skin barrier function*
3 months
Clinically proven to improve skin barrier function by 5% Up to 19% improvement in skin barrier function*
POSITIVE RESPONDERS OVER TIME
80% of participants showed improved skin barrier function after 2 months.
Results Explained

*"Up to" shows the best individual result we recorded. The average result is shown above.

SEE FULL STUDY
AFTER Mexameter® Skin Redness BEFORE
Mexameter® Skin Redness

Mexameter® Skin Redness

Measures skin redness using light absorption and reflection. The Mexameter® emits specific wavelengths of light and measures how much is reflected by the skin, providing an objective assessment of redness levels and changes over time.

Decrease in Erythema
1 hour
Clinically proven to reduce skin redness by 3% Up to 9% reduction in skin redness.
2 months
Clinically proven to reduce skin redness by 3% Up to 13% reduction in skin redness.
3 months
Clinically proven to reduce skin redness by 4% Up to 11% reduction in skin redness.
POSITIVE RESPONDERS OVER TIME
62% of participants showed reduced skin redness after 3 months.
Results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY
AFTER Mexameter® — Pigmentation BEFORE
Mexameter® — Pigmentation

Mexameter® — Pigmentation

Measures skin pigmentation by assessing melanin levels. The Mexameter® uses 660 nm red light and 880 nm near-infrared light, selected for their different absorption by skin pigments, to provide an objective measurement of melanin in the skin.

Decrease in Melanin
2 Months
Up to 7% reduction in melanin
3 months
Up to 9% reduction in melanin
POSITIVE RESPONDERS OVER TIME
46% of participants showed reduced melanin after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY

Cutometer®

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Elasticity (R5)

Measures skin elasticity by assessing how effectively the skin returns towards its original shape after deformation. An increase in R5 indicates improved elastic recovery and therefore greater skin elasticity.

2 months
Clinically proven to increase skin elasticity by 7% Up to 24% increase in skin elasticity
3 months
Up to 25% increase in skin elasticity
POSITIVE RESPONDERS OVER TIME
64% of participants showed increased skin elasticity after 2 months.
RESULTS EXPLAINED

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY

Firmness (F4)

Measures skin firmness by assessing its resistance to repeated deformation. A decrease in F4 indicates greater resistance to deformation and therefore firmer skin.

2 months
Clinically proven to improve skin firmness by 2% Up to 25% improvement in skin firmness*
3 months
Clinically proven to improve skin firmness by 4% Up to 21% improvement in skin firmness*
POSITIVE RESPONDERS OVER TIME
62% of participants showed improved skin firmness after 2 months.
Results Explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY

VISIA - 3D Imaging

Standardised digital facial images are captured using the Canfield VISIA® CR system at baseline, after first use, and after 4, 8 and 12 weeks of product use.

Images are taken under standard and UV illumination, with the front, left and right sides of the face photographed. Images are analysed using VISIA® software to quantitatively assess changes in lines and wrinkles, skin texture, pores, blemishes and pigmentation, including UV spots.

View:

UV Spots

Uses UV photography to detect sun related pigmentation beneath the skin’s surface that may not be fully visible under normal lighting. A decrease indicates fewer or less prominent UV spots.

1 hour

Up to 32% reduction in UV spots

1 month

Clinically proven to reduce UV spots by 4%

Up to 13% reduction in UV spots*
2 months
Up to 11% reduction in UV spots
3 months
Up to 11% reduction in UV spots
Positive Responders Over Time
64% of participants showed reduced UV spots after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY
AFTER Brown Spots BEFORE
Brown Spots

Brown Spots

Detects visible areas of brown pigmentation, including freckles and hyperpigmented spots. A decrease indicates fewer or less prominent brown spots.

3 months
Clinically proven to reduce brown spots by 1%. Up to 9% reduction in brown spots.*
Positive Responders Over Time
60% of participants showed reduced brown spots after 3 months.
Results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY
AFTER Wrinkles BEFORE
Wrinkles

Wrinkles

Detects visible lines and wrinkles through image analysis. A decrease indicates a reduction in the severity and visibility of wrinkles.

1 hour
Clinically proven to reduce the appearance of wrinkles by 9%. Up to 47% reduction in the appearance of wrinkles.*
Positive Responders Over Time
69% of participants showed reduced the appearance of wrinkles after 1 hour.
Results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY

Key Testing Protocols

Independent Third Party Clinical Trial (Cardiff)

View:

Corneometer® Skin Hydration

Measures skin hydration at the surface. The Corneometer® detects changes in the skin’s moisture levels, with higher readings indicating better hydration. Measurements are taken at multiple points across both sides of the face to provide an objective assessment of skin moisturisation.

Increase in moisturisation
1 hour
Clinically proven to increase skin hydration by 16% Up to 30% increase in skin hydration*
2 months
Clinically proven to increase skin hydration by 17% Up to 25% increase in skin hydration*
POSITIVE RESPONDERS OVER TIME
66% of participants showed increased skin hydration after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Tewameter® Skin Barrier Function

Measures water loss through the skin’s surface. The Tewameter® detects changes in transepidermal water loss (TEWL), providing an objective measure of skin barrier function and moisture retention.

Improvement of skin barrier function
1 hour
Clinically proven to improve skin barrier function by 6% Up to 14% improvement in skin barrier function*
1 month
Clinically proven to improve skin barrier function by 8% Up to 26% improvement in skin barrier function*
2 months
Clinically proven to improve skin barrier function by 12% Up to 27% improvement in skin barrier function*
3 months
Clinically proven to improve skin barrier function by 4% Up to 15% improvement in skin barrier function
POSITIVE RESPONDERS OVER TIME
83% of participants showed improved skin barrier function after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Mexameter® Skin Redness

Measures skin redness using light absorption and reflection. The Mexameter® emits specific wavelengths of light and measures how much is reflected by the skin, providing an objective assessment of redness levels and changes over time.

Decrease in Erythema
1 month
Clinically proven to reduce skin redness by 2% Up to 11% reduction in skin redness*
POSITIVE RESPONDERS OVER TIME
65% of participants showed reduced skin redness after 1 month.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Cutometer

View:

Elasticity (R5)

Measures skin elasticity by assessing how effectively the skin returns towards its original shape after deformation. An increase in R5 indicates improved elastic recovery and therefore greater skin elasticity.

2 months
Clinically proven to increase skin elasticity by 9% Up to 28% increase in skin elasticity*
POSITIVE RESPONDERS OVER TIME
62% of participants showed increased skin elasticity after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Firmness (Q0)

Measures skin firmness by assessing how much the skin deforms under controlled suction. A decrease in Q0 indicates greater resistance to deformation and therefore firmer skin.

2 MONTHS
Clinically proven to improve skin firmness by 7% Up to 26% improvement in skin firmness.*
POSITIVE RESPONDERS OVER TIME
69% of participants showed improved skin firmness after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Firmness (F4)

Measures skin firmness by assessing its resistance to repeated deformation. A decrease in F4 indicates greater resistance to deformation and therefore firmer skin.

2 Months
Clinically proven to improve skin firmness by 7% Up to 28% improvement in skin firmness*
3 months
Clinically proven to improve skin firmness by 8% Up to 21% improvement in skin firmness*
POSITIVE RESPONDERS OVER TIME
71% of participants showed improved skin firmness after 3 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Cutometer

View:

Firmness (Q0)

Measures skin firmness by assessing how much the skin deforms under controlled suction. A decrease in Q0 indicates greater resistance to deformation and therefore firmer skin.

3 months
Clinically proven to improve skin firmness by 7% Up to 21% improvement in skin firmness*
POSITIVE RESPONDERS OVER TIME
66% of participants showed improved skin firmness after 3 months.
Results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Elasticity (R5)

Measures skin elasticity by assessing how effectively the skin returns towards its original shape after deformation. An increase in R5 indicates improved elastic recovery and therefore greater skin elasticity.

2 months
Clinically proven to increase skin elasticity by 10% Up to 23% increase in skin elasticity*
POSITIVE RESPONDERS OVER TIME
62% of participants showed increased skin elasticity after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Key Testing Protocols

Independent Third Party Clinical Trial (Cardiff).

View:

Corneometer® Skin Hydration

Measures skin hydration at the surface. The Corneometer® detects changes in the skin’s moisture levels, with higher readings indicating better hydration. Measurements are taken at multiple points across both sides of the face to provide an objective assessment of skin moisturisation.

Increase in moisturisation
2 months
Clinically proven to increase skin hydration by 13% Up to 29% increase in skin hydration*
POSITIVE RESPONDERS OVER TIME
62% of participants showed increased skin hydration after 2 months
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Tewameter® Skin Barrier Function

Measures water loss through the skin’s surface. The Tewameter® detects changes in transepidermal water loss (TEWL), providing an objective measure of skin barrier function and moisture retention.

Improvement in skin barrier function
1 hour
Clinically proven to improve skin barrier function by 7% Up to 19% improvement in skin barrier function
1 month
Clinically proven to improve skin barrier function by 6% Up to 18% improvement in skin barrier function*
2 months
Clinically proven to improve skin barrier function by 6% Up to 21% improvement in skin barrier function*
POSITIVE RESPONDERS OVER TIME
68% of participants showed improved skin barrier function after 1 month.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Mexameter® Skin Redness

Measures skin redness using light absorption and reflection. The Mexameter® emits specific wavelengths of light and measures how much is reflected by the skin, providing an objective assessment of redness levels and changes over time.

Decrease in Erythema
3 months
Clinically proven to reduce skin redness by 5% Up to 14% reduction in skin redness*
POSITIVE RESPONDERS OVER TIME
75% of participants showed reduced skin redness after 3 months.
Results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

MHz Ultrasound

Skin density was assessed using high-frequency ultrasound sonography, a validated, non-invasive quantitative clinical methodology.

View:

Skin Density (%)

Measures skin density beneath the surface using high-frequency ultrasound. A 22 MHz probe scans the dermis to assess its structure and density, providing an objective measurement of changes in skin density over time.

1 Month
Clinically proven to increase skin density by 9% Up to 27% increase in skin density*
Positive Responders Over Time
62% of participants showed increased skin density after 1 month.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

VISIA - 3D Imaging

Standardised digital facial images are captured using the Canfield VISIA® CR system at baseline, after first use, and after 4, 8 and 12 weeks of product use.

Images are taken under standard and UV illumination, with the front, left and right sides of the face photographed. Images are analysed using VISIA® software to quantitatively assess changes in lines and wrinkles, skin texture, pores, blemishes and pigmentation, including UV spots.

View:
AFTER UV Spots BEFORE
UV Spots

UV Spots

Uses UV photography to detect sun-related pigmentation beneath the skin’s surface that may not be fully visible under normal lighting. A decrease indicates fewer or less prominent UV spots.

1 hour
Up to 9% reduction in UV spots*
Positive Responders Over Time
62% of participants showed reduced UV spots after 1 hour.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT
AFTER Wrinkles BEFORE
Wrinkles

Wrinkles

Detects visible lines and wrinkles through image analysis. A decrease indicates a reduction in the severity and visibility of wrinkles.

2 Months
Clinically proven to reduce the appearance of wrinkles by 9% Up to 42% reduction in the appearance of wrinkles*
Positive Responders Over Time
68% of participants showed reduced the appearance of wrinkles after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

VISIA - 3D Imaging

Standardised digital facial images are captured using the Canfield VISIA® CR system at baseline, after first use, and after 4, 8 and 12 weeks of product use.

Images are taken under standard and UV illumination, with the front, left and right sides of the face photographed. Images are analysed using VISIA® software to quantitatively assess changes in lines and wrinkles, skin texture, pores, blemishes and pigmentation, including UV spots.

View:
AFTER UV Spots BEFORE
UV Spots

UV Spots

Uses UV photography to detect sun-related pigmentation beneath the skin’s surface that may not be fully visible under normal lighting. A decrease indicates fewer or less prominent UV spots.

1 hour
Clinically proven to reduce UV spots by 3% Up to 8% reduction in UV spots
2 months
Clinically proven to reduce UV spots by 4% Up to 8% reduction in UV spots
Positive Responders Over Time
66% of participants showed reduced UV spots after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Brown Spots

Detects visible areas of brown pigmentation, including freckles and hyperpigmented spots. A decrease indicates fewer or less prominent brown spots.

3 months
Clinically proven to reduce brown spots by 3% Up to 7% reduction in brown spots
Positive Responders Over Time
66% of participants showed reduced brown spots after 3 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

Wrinkles

Detects visible lines and wrinkles through image analysis. A decrease indicates a reduction in the severity and visibility of wrinkles.

1 hour
Up to 35% reduction in the appearance of wrinkles
Positive Responders Over Time
69% of participants showed reduced the appearance of wrinkles after 1 hour.
Results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

ANTERA 3D - Imagery

The Antera 3D® is a handheld, multi-spectral imaging system used for the quantitative assessment of skin characteristics associated with pigmentation, texture and visible skin ageing.

View:
AFTER Texture Score BEFORE
Texture Score

Texture Score

Measuresskin surface texture and irregularity within the analysed area. A decreaseindicates a smoother, more even skin surface.

3 months
Up to 14% improvement in skin texture
Positive Responders Over Time
27% of participants showed improved skin texture after 3 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

ANTERA 3D - Imagery

The Antera 3D® is a handheld, multi-spectral imaging system used for the quantitative assessment of skin characteristics associated with pigmentation, texture and visible skin ageing.

View:
AFTER Pigmentation Score BEFORE
Pigmentation Score

Pigmentation Score

Provides an overall quantitative assessment of visible pigmentation within the selected area. A decrease indicates reduced pigmentation / a more even looking measured pigmentation profile.

2 Months
Clinically proven to reduce pigmentation by 3% Up to 10% reduction in pigmentation*
Positive Responders Over Time
66% of participants showed reduced pigmentation after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT
AFTER Average Redness BEFORE
Average Redness

Average Redness

Measures the average level of skin redness across the analysed area. A decrease indicates an overall reduction in measurable redness.

2 Months
Clinically proven to reduce skin redness by 3% Up to 11% reduction in skin redness*
Positive Responders Over Time
66% of participants showed reduced skin redness after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT
AFTER Redness Score BEFORE
Redness Score

Redness Score

Measures the overall severity and distribution of skin redness within the analysed area. A decrease indicates an overall improvement in measurable redness.

2 Months
Clinically proven to reduce skin redness by 5% Up to 20% reduction in skin redness
Positive Responders Over Time
69% of participants showed reduced skin redness after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL REPORT

ANTERA 3D - Imagery

The Antera 3D® is a handheld, multi-spectral imaging system used for the quantitative assessment of skin characteristics associated with pigmentation, texture and visible skin ageing.

View:
AFTER Fine Lines BEFORE
Fine Lines

Fine Lines

Measures the appearance and severity of fine lines using 3D skin imaging. The Antera 3D® creates a detailed image of the skin surface to objectively measure changes in fine line score, with a decrease indicating less pronounced fine lines.

2 Months
Up to 15% reduction in fine line score
Positive Responders Over Time
42% of participants showed reduced fine line score after 2 months.
Results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY
AFTER Wrinkles BEFORE
Wrinkles

Wrinkles

Measures the 3D volume of wrinkles within the analysed area. A decrease in wrinkle volume indicates wrinkles have become less pronounced in depth and/or size.

2 Months
Up to 67% reduction in wrinkle volume.
3 Months
Up to 100% reduction in wrinkle volume*
Positive Responders Over Time
56% of participants showed reduced wrinkle volume after 3 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY

Texture Score

Measures skin surface texture and irregularity within the analysed area. A decrease indicates a smoother, more even skin surface.

3 months
Up to 17% improvement in skin texture*
POSITIVE RESPONDERS OVER TIME
40% of participants showed improved skin texture after 3 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY
AFTER Pigmentation Score  BEFORE
Pigmentation Score 

Pigmentation Score 

Provides an overall quantitative assessment of visible pigmentation within the selected area. A decrease indicates reduced pigmentation / a more even looking measured pigmentation profile.

1 hour
Up to 6% reduction in pigmentation*
2 months
Clinically proven to reduce pigmentation by 1% Up to 8% reduction in pigmentation*
POSITIVE RESPONDERS OVER TIME
51% of participants showed reduced pigmentation after 2 months.
Results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY

Redness Score

Measures the overall severity and distribution of skin redness within the analysed area. A decrease indicates an overall improvement in measurable redness.

2 MONTHS
Clinically proven to reduce skin redness by 2% Up to 15% reduction in skin redness*
POSITIVE RESPONDERS OVER TIME
63% of participants showed reduced skin redness after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY
AFTER Average Redness BEFORE
Average Redness

Average Redness

Measures the average level of skin redness across the analysed area. A decrease indicates an overall reduction in measurable redness.

1 month
Up to 5% reduction in skin redness*
2 months
Clinically proven to reduce skin redness by 1% Up to 10% reduction in skin redness*
POSITIVE RESPONDERS OVER TIME
56% of participants showed reduced skin redness after 2 months.
results explained

*"Up to" shows the best individual result we recorded. The average result is shown above

SEE FULL STUDY

Clinical Testing & SPF Data

Independent third-party laboratory reports, in-vivo SPF ratings, and critical wavelength certifications.

TEST COMPLETED
DOWNLOAD STUDY
Boots 5-star UVA In vitro laboratory testing following UV irradiation to measure the ratio of UVA to UVB filtration. Testing confirmed a post-irradiation absorbance ratio of 0.99, exceeding the >0.90 threshold required to achieve the highest 5-star rating and verifying near 1:1 broad-spectrum defence.
Download Study 1 (PDF)
PA++++ Persistent Pigment Darkening (PPD) clinical testing evaluating protection against deep-penetrating UVA radiation. Testing confirmed an in vitro UVA-PF of 76.8 alongside an in vivo human skin score of 20, exceeding the minimum 16 threshold required for the highest PA++++ rating.
Download Study (PDF) Download Study 2 (PDF)
SPF Standardised laboratory evaluation measuring UVB filtration and sunburn prevention. The formulation was tested to determine its actual protection level, recording a measured SPF of 77 and surpassing the minimum SPF 60 benchmark required for an official SPF 50+ classification.
Download Study (PDF)
Failed testing
Download Study (PDF)