How do I know which System Kit is right for me?

For natural, untreated hair with light thinning, we recommend System Kit 1. For natural, untreated hair with progressed thinning, we recommend System Kit 2. For damaged, dry, or colored treated hair with light thinning, we recommend System Kit 3. For damaged, dry, or color treated hair with progressed thinning, we recommend System Kit 4.

How do I know which kit to use if I previously used System Kit 5 or 6?

We recently transitioned from 6 kits to 4 to make it even easier to navigate which kit will help you meet your hair goals. If you previously used System Kit 5, we recommend using System Kit 3. If you recently used System Kit 6, we recommend using System Kit 4.

How often should I use the 3-step system to see results?

We recommend using the complete system at least 3 times a week for visible results in 30 days.

Can I use the Nioxin System 1 leave-in treatment every day?

For optimal results, use the Nioxin System 1 Leave-In Treatment daily for visible results in 30 days.

What are signs of light thinning?

Light thinning can show up in subtle ways. You may notice more hair in your brush or shower, your hair may feel less full than it used to, your ponytail may seem smaller, or you may be seeing early signs of reduced hair density.

How is thinning different from hair fall?

Hair fall refers to the shedding of individual hair strands, which can be a normal part of the hair growth cycle. Hair thinning refers to a gradual reduction in hair density, which can make hair feel less full over time. Signs of thinning may include a smaller ponytail, less volume, or reduced hair density.

Can I use System 1 on color-treated hair?

Nioxin System 1 is specifically formulated for natural, untreated hair with light thinning. If your hair is color-treated, highlighted, bleached, or chemically processed, we recommend System 3, which is designed for dry, damaged or color-treated hair with light thinning.

What products should I use with Nioxin System 1 Leave In Treatment?

For a complete thinning hair routine, pair the System 1 Leave-In Treatment with the System 1 Shampoo and Conditioner. Choose the Trial Size Kit and Full Size Kit based on your routine needs.

System 1 Leave In Treatment 200 mL

DAILY LEAVE-IN SCALP TREATMENT FOR NATURAL, UNTREATED HAIR WITH LIGHT THINNING | REGULAR STRENGTH

Current price $43.00

More Conditioning for Natural Hair with Light Thinning.

Nioxin System 1 Scalp + Hair Thickening Treatment is designed for natural, untreated hair with light thinning. Applied as a lightweight leave-in spray, it helps care for the scalp and hair while enhancing the appearance of thicker, fuller-looking hair.

Designed with the needs of denser, natural hair in mind, System 1 provides more conditioning than System 2 while helping:

Support a healthy scalp environment

Condition natural, untreated hair

Enhance the appearance of hair thickness and fullness

Maintain body and movement

Deliver lightweight leave-in care through a spray application

For best results, use as part of the complete Nioxin System 1 regimen.

Featured Ingredients

Niacinamide

A form of vitamin B3, that helps to increase the diameter of each hair strand and improve the scalp skin barrier function

Caffeine

Known to help stimulate hair follicles, maintain the skin barrier, and with massage improves blood microcirculation

Mentha Arvensis Leaf Oil

Also known as wild mint oil, this oil is known for its refreshing and invigorating benefits that stimulate the scalp and promote circulation

Full Ingredients List:

Aqua/Water/Eau, Niacinamide, Caffeine, Phenoxyethanol, Sodium Benzoate, Benzyl Alcohol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Polysorbate 80, Polysorbate 60,

Acetamide MEA, Triethanolamine, PEG-23M, Propylene Glycol, Tetrasodium EDTA, Methyl Nicotinate, Parfum/Fragrance, Mentha Arvensis Leaf Oil, Mentha Piperita

(Peppermint) Oil, PEG-30 Dipolyhydroxystearate, Trideceth-6, Limonene, Camellia Sinensis Leaf Extract, Silica, Cystine Bis-PG-Propyl Silanetriol, Biotin, Lecithin,

Tocopheryl Acetate, Humulus Lupulus (Hops) Flower Extract, Citrus Paradisi (Grapefruit) Peel Extract, Urtica Dioica (Nettle) Leaf Extract, Acer Saccharum (Sugar Maple)

Extract, Citrus Limon (Lemon) Peel Extract, Saccharum Officinarum/Sugar Cane Extract/Extrait de canne à sucre, Vaccinium Myrtillus Leaf Extract, Faex Extract/Yeast

Extract/Extrait de levure, Propylparaben, Citrus Aurantium Dulcis (Orange) Fruit Extract, BHT, Potassium Sorbate, Maltodextrin, Methylparaben, Ethylparaben, Butylparaben.

HOW TO USE

Apply Nioxin System 1 Scalp + Hair Thickening Treatment to towel-dried hair, focusing on the scalp and areas of concern.
Massage gently to ensure even distribution.
Do not rinse out. Style as desired.
For optimal results, use alongside Nioxin System 1 Scalp + Hair Shampoo and Conditioner.

LIGHTWEIGHT SPRAY APPLICATION

Easy-to-apply leave-in treatment for natural hair with light thinning

SCALP CARE

Supports a healthy scalp environment while maintaining body and movement

VISIBLE RESULTS IN AS LITTLE AS 30 DAYS*

Hair looks thicker and fuller with continued use as part of your System 1 routine.

SYSTEM KIT 1

For natural, untreated hair with light thinning. Best for those beginning to notice less fullness and volume.

SYSTEM KIT 2

For natural, untreated hair with progressed thinning. Best for more noticeable changes in fullness and scalp visibility.

SYSTEM KIT 3

For dry, damaged, or color-treated hair with light thinning. Best for hair experiencing reduced fullness and volume.

SYSTEM KIT 4

For dry, damaged, or color-treated hair with progressed thinning. Best for more noticeable changes in fullness and scalp visibility.

WHY SCALP CARE MATTERS FOR THINNING HAIR

Healthy-looking hair starts with the scalp. Over time, buildup, excess sebum, and environmental stressors can impact the scalp environment.

Scalp-focused care helps create the foundation for thicker-, fuller-looking hair. Nioxin's scalp-first approach is designed to support the scalp while helping hair appear denser and more voluminous.

Learn more about the importance of scalp care HERE.

Ingredients

CAFFEINE

Supports hair follicles, improves blood circulation and maintains the skin barrier

MENTHA ARVENSIS LEAF OIL

Also known as wild mint oil, this oil is known for its refreshing and invigorating benefits that stimulate the scalp and promote circulation

NIACINAMIDE

A form of Vitamin B3, niacinamide helps nourish the hair root and can have a positive impact on hair growth and overall scalp health

COMPLETE YOUR THICKENING ROUTINE

System Kit 1 Full Size Kit
BESTSELLER
System Kit 1 Full Size Kit
FOR NATURAL HAIR WITH LIGHT THINNING
System 1 Shampoo 300 mL
System 1 Shampoo 300 mL
SCALP + HAIR CLEANSING SHAMPOO FOR NATURAL, UNTREATED HAIR WITH LIGHT THINNING | REGULAR STRENGTH
System 1 Conditioner 300 mL
System 1 Conditioner 300 mL
SCALP + HAIR CONDITIONER FOR NATURAL, UNTREATED HAIR WITH LIGHT THINNING | REGULAR STRENGTH
System 1 Leave In Treatment 200 mL
System 1 Leave In Treatment 200 mL
DAILY LEAVE-IN SCALP TREATMENT FOR NATURAL, UNTREATED HAIR WITH LIGHT THINNING | REGULAR STRENGTH