The landscape for oily hair care shifted dramatically when clarifying shampoos with natural oils and gentle formulas entered the picture. Having tested dozens myself, I’ve found that the secret to managing greasy roots without over-drying lies in balancing thorough cleansing with moisture retention. That’s why I was impressed with how well the Neutrogena Exfoliating Clarify & Shine Shampoo 12oz clears excess oil while remaining gentle enough for daily use, thanks to its pH-balanced cream formula and natural pink grapefruit extract.
Compared to heavier, sulfate-packed options, this shampoo hits the sweet spot—effective oil control, soft feel, and a fresh citrus scent. It’s perfect if you want a product that works without stripping essential moisture or damaging color. After hands-on testing, I recommend it as a reliable, affordable choice for oily hair—it leaves hair feeling refreshed, manageably clean, and vibrant, all at a friendly price point. Trust me, this one genuinely delivers without compromise.
Top Recommendation: Neutrogena Exfoliating Clarify & Shine Shampoo 12oz
Why We Recommend It: This shampoo offers a non-drying, pH-balanced cream formula infused with pink grapefruit extract, which deep cleans without stripping moisture. Its gentle, sulfate-free composition preserves hair vibrancy and suits daily use. Unlike heavier clarifying formulas, it balances oil control with hydration, making it ideal for oily, color-treated, or sensitive scalps.
Best inexpensive shampoo for oily hair: Our Top 5 Picks
- L’Oreal Elvive Hyaluron + Pure Clarifying Shampoo 28oz – Best value shampoo for oily hair
- Neutrogena Exfoliating Clarify & Shine Shampoo 12oz – Best exfoliating shampoo for oily hair
- OGX Clarifying Strength + Rosemary Mint Shampoo 13 fl oz – Best affordable clarifying shampoo
- Clarifying Shampoo for Oily Hair with Rosemary & Lemon 8oz – Best budget shampoo for oily hair
- Garnier Fructis Grow Strong Thickening Shampoo 33.8oz – Best cost-effective shampoo for oily hair
L’Oreal Elvive Hyaluron + Pure Purifying Shampoo 28oz
- ✓ Effective oil control
- ✓ Pleasant, long-lasting scent
- ✓ Gentle and non-drying
- ✕ Might need frequent washing
- ✕ Not best for very dry hair
| Formulation | Dual-action with Salicylic and Hyaluronic Acids |
| Size | 28 oz (828 ml) |
| Target Hair Type | Oily roots and dehydrated lengths |
| Residue Removal Efficacy | Removes up to 100% of residue |
| Duration of Effect | Up to 72 hours of purified roots and hydrated lengths |
| Key Ingredients | [‘Salicylic Acid’, ‘Hyaluronic Acid’] |
While rinsing out this shampoo, I was surprised to find that my scalp felt instantly refreshed without that harsh, stripped sensation I usually get from clarifying shampoos. I expected it to be a typical deep-cleaning formula that leaves hair feeling dry, but instead, my roots felt light and energized, while my lengths still retained a touch of moisture.
The dual-action formula with salicylic and hyaluronic acids really lives up to its promise. My oily roots stayed fresh for up to 72 hours, and I noticed my hair looked visibly less greasy after just one wash.
The scent is surprisingly delightful—bright berries mixed with cherry blossom and a hint of vanilla, which lingers without overpowering.
What I really appreciated is how gentle it felt, despite its clarifying powers. It exfoliates the scalp effectively, removing residue from styling products or excess oil, yet it doesn’t leave my hair feeling squeaky or dry.
After rinsing, my hair was clean, shiny, and had a nice bounce, even on the second day.
Using this shampoo feels like a skincare routine for your hair—fresh, clean, and balanced. It’s perfect if you want a budget-friendly option that tackles oily roots without dehydrating your lengths.
Plus, it’s a great addition to your routine if you like to keep your scalp healthy and clear.
Overall, this shampoo gives you a fresh start every time without the heaviness or dryness that some clarifying shampoos cause. It’s a solid, affordable choice for oily hair that needs a good detox without sacrificing hydration.
Neutrogena Exfoliating Clarify & Shine Shampoo 12oz
- ✓ Deeply cleanses oily scalp
- ✓ Gentle and non-drying
- ✓ Refreshing citrus scent
- ✕ May need frequent washing
- ✕ Not suitable for very dry hair
| Formulation Type | Cream-based, pH-balanced, sulfate-free |
| Key Ingredients | Pink grapefruit extract, natural citrus and floral scent components |
| Suitable Hair Types | Oily, color-treated, all hair types |
| Usage Frequency | Safe for daily use |
| pH Level | Balanced to maintain scalp’s natural barrier |
| Size | 12 ounces (355 ml) |
The first time I squeezed out the Neutrogena Exfoliating Clarify & Shine Shampoo, I was surprised by how light and creamy it felt in my hand. As I massaged it into my scalp, I immediately noticed a fresh citrus scent that made my shower feel like a burst of energy.
The pink grapefruit extract really shines through, leaving my hair smelling bright and clean.
Applying the shampoo was effortless, thanks to its smooth, non-drying cream formula. It lathers up nicely without needing a lot of product, which is a big plus for daily use.
I appreciated that it didn’t feel harsh or stripping, even after rinsing, which is often a concern with clarifying shampoos.
After rinsing, my hair felt surprisingly soft and manageable. It definitely removed excess oil and buildup, but without leaving that tight, squeaky-clean feeling that makes hair feel brittle.
My scalp also felt fresh and less greasy, even after a busy day or a workout.
What really impressed me was how well it preserved my color-treated hair. Many clarifying shampoos tend to strip vibrancy, but this one kept my color looking lively.
Plus, it’s sulfate-free, so I didn’t worry about damaging my locks or drying out my scalp with harsh ingredients.
Overall, this shampoo hits a sweet spot—effective at oil control, gentle enough for frequent use, and smelling fantastic. It’s a go-to for anyone with oily hair who wants a budget-friendly, yet high-quality, cleansing solution.
OGX Clarifying Strength + Rosemary Mint Shampoo 13oz
- ✓ Deep cleansing with fresh scent
- ✓ Strengthens hair and adds shine
- ✓ No sulfates or dyes
- ✕ Might be drying for very dry hair
- ✕ Not suitable for color-treated hair
| Volume | 13 fluid ounces (385 mL) |
| Main Ingredients | Rosemary and peppermint extracts |
| Formulation | Sulfate-free and dye-free |
| Technology | Lipi Pro Shield Technology for 2x protein and lipid protection |
| Purpose | Clarifies oily hair by removing oil and residue |
| Additional Benefits | Strengthens hair, adds shine, reduces frizz and breakage |
As soon as I unscrew the cap of the OGX Clarifying Strength + Rosemary Mint Shampoo, I’m greeted by a burst of refreshing mint and herbal rosemary. The clear, slightly viscous liquid feels cool to the touch and smells invigorating without being overpowering.
I can tell right away this will be a lively wash for my oily roots.
Using it is a breeze. The shampoo lathers up quickly, creating a thick, minty foam that feels like it’s really cleansing deep down.
You’ll notice how lightweight it is—no heavy residue or filmy feeling left behind. It’s perfect for removing excess oil, especially after a long day or sweaty workout.
The scent is fresh and energizing, and it stays subtly in your hair without being overwhelming. After rinsing, my scalp feels noticeably cleaner, and my hair appears less greasy.
I also appreciate how the formula avoids sulfates and dyes, so it feels gentler on my scalp and strands.
What really impressed me is the strengthened feeling I got after blow-drying. My hair looked shinier and healthier, not stripped or brittle.
The added protein and lipid protection seem to do their job, making my hair feel resilient against damage.
While it’s great at controlling oil, it’s not overly drying, which can be a tricky balance. The price point is super affordable for the quality, and I’d say it’s a solid choice for anyone battling greasy hair daily.
Just keep in mind, if your hair is super dry or damaged, you might want to use a nourishing conditioner afterward.
Clarifying Shampoo for Oily Hair with Lemon & Jojoba Oil 8oz
- ✓ Natural ingredients work well
- ✓ Effective oil control
- ✓ Gentle on scalp
- ✕ Slightly lighter scent
- ✕ May need frequent washing
| Shampoo Type | Clarifying, sulfate-free formula for oily scalp |
| Key Ingredients | Lemon oil, Jojoba oil, Rosemary oil, Cypress basil oil |
| Size | 8 oz (237 ml) |
| Suitable For | Oily scalp and hair, dandruff and buildup control |
| Hair Concerns Addressed | Grease, buildup, dandruff, itchy scalp |
| Formulation Features | Paraben-free, sulfate-free, natural ingredients |
Unlike some clarifying shampoos that leave your hair feeling stripped and dry, this Lemon & Jojoba Oil shampoo surprises you right from the first wash. The scent of fresh lemon instantly energizes your scalp, making you feel like you’re giving your hair a zesty detox.
It has a lightweight, gel-like texture that lathers easily without needing much product. You’ll notice a deep clean almost immediately, as it effectively cuts through excess oil and product buildup.
The jojoba oil adds a subtle moisture that prevents your scalp from feeling overly tight or irritated.
What really sets this apart is how gentle it feels. Unlike harsh sulfate-heavy shampoos, this one uses natural ingredients like rosemary, basil, and cypress oils to purify without stripping.
I found my scalp less itchy and flaky after just a few washes, which is a huge win if you deal with dandruff or an oily scalp.
Another nice touch is how manageable your hair feels after rinsing—clean but not overly dry or brittle. Plus, the scent lingers lightly, giving you a fresh, citrusy boost that lasts all day.
It’s perfect for everyday use, especially if you want a budget-friendly option that actually works.
Overall, this shampoo delivers on its promise to control oil and clear buildup, making your scalp healthier without harsh chemicals. It’s a solid choice for anyone tired of greasy roots and sensitive to sulfates or parabens.
Garnier Fructis Grow Strong Thickening Shampoo 33.8oz
- ✓ Lightweight and refreshing scent
- ✓ Adds instant volume and fullness
- ✓ Long-lasting oil control
- ✕ Strong citrus smell
- ✕ Might not suit very dry hair
| Main Ingredients | Biotin, Vitamin C, Blood Orange Extract |
| Volume | 33.8 oz (1000 ml) |
| Hair Benefits | Instant fullness and body, up to 72 hours of thicker-looking hair |
| Formulation Claims | Paraben Free, Cruelty Free, Vegan |
| Packaging Material | Bottles made of 100% Recycled Plastic |
| Product System | Includes shampoo, conditioner, and 10-in-1 leave-in treatment |
There was a moment when my scalp was so greasy by midday, I felt like I had to wash my hair twice a day just to keep it looking fresh. Finding a shampoo that can handle oily roots without stripping my hair or weighing it down seemed impossible—until I tried Garnier Fructis Grow Strong Thickening Shampoo.
From the first wash, I noticed how lightweight the formula felt in my hand. It lathers up easily and rinses clean, leaving no residue behind.
The scent of blood orange and vitamin C is refreshing, giving a slight zing that makes your scalp feel invigorated.
What surprised me most is how instantly it added volume. My fine hair looked fuller and thicker right after drying, not flat or limp like with some other shampoos.
The biotin content seems to really help strengthen hair over time, and I appreciate that it’s cruelty-free and made with recycled plastic bottles.
Another plus is the long-lasting effect. I could go up to 72 hours without oiliness creeping back, which is a game-changer for busy mornings.
The system of shampoo, conditioner, and leave-in treatment really works together to keep my hair feeling healthy and vibrant.
Of course, it’s not perfect. If you’re very sensitive to scent, the citrus aroma might be a bit strong.
And while it controls oil well, those with very dry or damaged hair might need extra moisture after use.
Overall, this shampoo delivers on its promise of fuller, thicker-looking hair without breaking the bank. It’s a solid choice for anyone battling oiliness but still wanting to keep their hair healthy and lively.
What Makes a Shampoo Inexpensive Yet Effective for Oily Hair?
Inexpensive yet effective shampoos for oily hair often contain specific ingredients that cleanse excess oil without stripping moisture.
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Key ingredients:
– Salicylic acid
– Tea tree oil
– Menthol
– Sulfates
– Natural clays -
Formulations types:
– Lightweight formulas
– Transparent gels
– Herbal-infused shampoos
Some individuals may prefer shampoos that include natural ingredients for their gentleness, while others might opt for formulations with stronger cleansing agents.
- Key Ingredients:
Salicylic acid in shampoo helps dissolve excess oil on the scalp. This beta hydroxy acid is known for its exfoliating properties. It penetrates the follicle and removes sebum buildup. Studies suggest that salicylic acid may also prevent dandruff, enhancing scalp health (Kumar, 2019).
Tea tree oil serves as a natural antibacterial agent. It helps reduce scalp inflammation and controls oil production. Research by Ahn et al. (2020) shows tea tree oil can be effective against certain fungi and bacteria that thrive in oily environments.
Menthol provides a cooling sensation. It stimulates blood flow to hair follicles, promoting growth. Users appreciate the refreshing feel, which often leads to an invigorated scalp.
Sulfates, although debated, are effective surfactants. They create lather and help cleanse excess oil. Some consumers prefer sulfate-free options due to potential irritation, but budget-friendly shampoos may commonly include sulfates.
Natural clays, such as bentonite or kaolin, absorb impurities and excess oil. They offer gentle cleansing and are often found in formulations marketed as eco-friendly or organic.
- Formulation Types:
Lightweight formulas are designed to cleanse without weighing hair down. They often exclude heavy oils or conditioning agents that can exacerbate oiliness.
Transparent gels are typically free of added moisturizing agents. They focus solely on cleansing, making them ideal for oily hair types.
Herbal-infused shampoos may include ingredients like sage or rosemary, both known for their oil-regulating properties. They provide a more natural approach while still offering effective cleansing.
Choosing the right inexpensive shampoo depends on individual preferences and hair needs. Some may prioritize performance over price, while others focus on ingredient transparency and environmental concerns.
Which Ingredients Should You Prioritize in Shampoos for Oily Hair?
To care for oily hair, prioritize shampoos containing ingredients that can effectively reduce excess oil.
- Tea Tree Oil
- Salicylic Acid
- Charcoal
- Aloe Vera
- Witch Hazel
- Lemongrass Oil
- Clay
The selection of these ingredients can influence how well a shampoo manages oiliness, while some users may have varying preferences or skin sensitivities.
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Tea Tree Oil:
Tea tree oil is a natural antiseptic with antibacterial properties. It helps balance oil production on the scalp. Research has shown that a higher concentration of tea tree oil can effectively reduce scalp sebum production, leading to less oily hair. -
Salicylic Acid:
Salicylic acid is a beta hydroxy acid that exfoliates the scalp and removes excess oil. It penetrates the hair follicles to clear away buildup, thus promoting a healthier scalp environment. Studies have linked salicylic acid to improved scalp conditions, especially in individuals with oily hair. -
Charcoal:
Charcoal acts as a powerful absorbent. It can attract and remove impurities from the scalp and hair. By binding to excess oil and dirt, charcoal prevents the scalp from becoming greasy. Its use has gained popularity as an effective detoxifying agent. -
Aloe Vera:
Aloe vera is known for its soothing properties. It helps calm the scalp while regulating sebum production. Additionally, aloe vera contains enzymes that promote scalp health. Its moisturizing properties can also prevent the scalp from overproducing oils. -
Witch Hazel:
Witch hazel is a natural astringent that helps tighten pores and reduce oiliness. It’s particularly beneficial for those with combination or oily scalps. Its use is supported by anecdotal evidence of reduced shine and oiliness after application. -
Lemongrass Oil:
Lemongrass oil has antimicrobial and antifungal effects. It can help prevent scalp issues related to excess oil and improve scalp hygiene. Some studies suggest that lemongrass oil may effectively minimize oil production. -
Clay:
Clay, such as kaolin or bentonite, is an absorbent substance. It can help draw out impurities and excess oil from the scalp. Clay-based shampoos may provide a deep-cleaning benefit, leaving the hair less greasy and more volumized.
How Do Different Shampoo Types Impact Oily Hair?
Different shampoo types impact oily hair by varying their formulation to target excess oil, address scalp health, and influence hair texture. The choice of shampoo can alter the hair’s oil balance, manage greasiness, and enhance volume.
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Clarifying shampoos: These shampoos contain stronger detergents. They effectively remove product buildup and excess sebum from the scalp and hair. A study by Miller (2020) found that using clarifying shampoo once a week helped reduce oiliness in users with oily scalps.
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Volumizing shampoos: Volumizing shampoos contain lightweight ingredients. They provide lift to the hair and prevent it from flattening against the scalp. According to research by Johnson et al. (2019), these shampoos can make the hair look fuller without adding moisture that may contribute to oiliness.
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Balancing shampoos: Balancing shampoos combine cleansing and moisturizing properties. They are designed to control oil production while maintaining the necessary hydration of the hair. Studies indicate that such shampoos help maintain scalp health without exacerbating oiliness (Smith, 2021).
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Sulfate-free shampoos: These shampoos exclude harsh sulfate detergents. They cleanse hair gently, preserving natural oils while preventing over-drying. Their gentle nature can help maintain scalp balance, which is important for oily hair types (Taylor, 2022).
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Natural or botanical shampoos: These products often contain plant-based ingredients, such as tea tree oil or rosemary, known for their oil-controlling properties. Research has shown that natural ingredients can effectively reduce sebum levels and improve scalp health (Green & Brown, 2023).
By selecting the appropriate shampoo type, individuals with oily hair can better manage their scalp’s oil production and promote healthier hair.
What Are the Top Inexpensive Shampoos for Oily Hair Available at Drugstores?
The top inexpensive shampoos for oily hair available at drugstores include specialized formulations to control oil and maintain hair health.
- Suave Essentials Daily Clarifying Shampoo
- Neutrogena Anti-Residue Shampoo
- Dove Men+Care Fresh and Clean Shampoo
- L’Oréal Paris Elvive Extraordinary Clay Shampoo
- Head & Shoulders Classic Clean Shampoo
- Pantene Pro-V Classic Clean Shampoo
- Herbal Essences Bio:Renew Tea Tree Shampoo
These shampoos offer varied attributes, such as oil control, cleansing power, and additional benefits like soothing effects or hydration. Consumer preferences may vary based on specific hair types, fragrance choices, and budget considerations.
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Suave Essentials Daily Clarifying Shampoo: Suave Essentials Daily Clarifying Shampoo effectively removes excess oil and product build-up. Its formula uses gentle surfactants, ensuring it cleans the hair without stripping essential moisture. This shampoo is widely recognized for its affordability and is suitable for frequent use.
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Neutrogena Anti-Residue Shampoo: Neutrogena Anti-Residue Shampoo aims to clear out product build-up on the scalp and hair. It is designed for occasional use, recommending application about once a week. Clinical studies indicate that it can remove up to 90% of residue, making it a strong option for individuals who use multiple hair products.
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Dove Men+Care Fresh and Clean Shampoo: Dove Men+Care Fresh and Clean Shampoo targets oily hair for men. Its lightweight formula cleans thoroughly while providing hydration. The inclusion of moisturizing ingredients helps to avoid the dryness often associated with clarifying shampoos, appealing to users looking for both cleaning and conditioning.
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L’Oréal Paris Elvive Extraordinary Clay Shampoo: L’Oréal’s Elvive Extraordinary Clay Shampoo combines clay to absorb oil at the roots with hydration for the ends. This dual-action approach helps balance oily roots and dry ends, targeting a common dilemma for individuals with oily hair. It appeals to those seeking a solution to mixed hair types.
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Head & Shoulders Classic Clean Shampoo: Head & Shoulders Classic Clean Shampoo primarily targets dandruff but also controls oiliness. Its zinc pyrithione formula combats flakes while limiting oil production. According to various dermatological reports, it is an effective choice for individuals facing dandruff alongside oily hair.
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Pantene Pro-V Classic Clean Shampoo: Pantene Pro-V Classic Clean Shampoo is known for its ability to cleanse oily hair while preserving essential nutrients. It is enriched with vitamin B5, which supports hair strength and softness. Users often praise its pleasant scent and ability to add body to flat hair.
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Herbal Essences Bio:Renew Tea Tree Shampoo: Herbal Essences Bio:Renew Tea Tree Shampoo incorporates tea tree oil, known for its anti-inflammatory properties. This shampoo cleanses oily hair effectively while offering a fresh scent. Tea tree oil has been shown in studies to help with scalp health, which can be beneficial for those with oily scalps.
These shampoos cater to varying customer needs, emphasizing oil control and hair health without high costs.
How Can You Maximize the Effectiveness of Inexpensive Shampoos?
You can maximize the effectiveness of inexpensive shampoos by using the right application techniques, enhancing with natural additives, and maintaining a proper hair care routine.
Effective application techniques enhance shampoo results.
– Dilution: Mixing shampoo with water can improve distribution and reduce concentration. This technique helps shampoo spread evenly through hair.
– Pre-cleansing: Rinsing hair with water before applying shampoo helps remove surface dirt and excess oil. This prepares the scalp for better cleansing.
– Scalp focus: Applying shampoo primarily to the scalp ensures the most effective cleansing while minimizing damage to hair ends. The scalp is where oil buildup occurs, making it the main target.
Natural additives can boost the shampoo’s cleaning and conditioning properties.
– Essential oils: Adding a few drops of essential oils like tea tree or lavender can provide additional benefits. Tea tree oil has antimicrobial properties, while lavender can soothe the scalp and promote relaxation.
– Aloe vera: Incorporating aloe vera gel into shampoo can add moisture and soothe irritation. This helps in promoting healthy hair and scalp health.
A well-rounded hair care routine enhances the results of any shampoo.
– Regular conditioning: Following up with a conditioner after shampooing replenishes moisture. This is crucial for hair elasticity and shine. According to a study by Rachita (2021), consistent conditioning reduces breakage significantly.
– Avoiding heat styling: Limiting heat exposure can prevent damage. Heat styling can negate the benefits of any shampoo or conditioner used.
– Scalp massage: During shampooing, a gentle scalp massage improves blood circulation. This can lead to healthier hair growth over time.
By implementing these strategies, the effectiveness of inexpensive shampoos can be significantly enhanced, leading to healthier and more manageable hair.
How Often Should You Use Shampoo on Oily Hair?
To determine how often to use shampoo on oily hair, consider your individual hair type and scalp condition. Typically, people with oily hair should shampoo every day or every other day. Daily washing helps to remove excess oil and buildup. If you find daily washing causes dryness, consider using a gentle shampoo that balances oil without stripping moisture. Monitor your scalp and adjust the frequency based on how oily it feels. You may also experiment with using dry shampoo on non-wash days to manage oil. Always choose a shampoo specifically designed for oily hair.
What Are the Common Mistakes to Avoid When Choosing Shampoo for Oily Hair?
When choosing shampoo for oily hair, it is crucial to avoid several common mistakes to ensure effective cleansing and hair health.
- Selecting shampoo with heavy moisturizers
- Choosing sulfate-free formulas without considering cleansing power
- Over-washing hair frequently
- Ignoring pH balance of the shampoo
- Using products with high alcohol content
The selection process requires balancing various attributes. Each choice in shampoo can either positively or negatively affect the scalp and hair. Understanding the implications of these choices can pave the way for healthier hair.
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Selecting Shampoo With Heavy Moisturizers:
Selecting shampoo with heavy moisturizers is a mistake for oily hair. These products contain ingredients designed to add hydration, which can weigh down the hair and make it greasy. Ingredients like shea butter and coconut oil can provide nourishment but are unsuitable for oily hair types. A study by the Journal of Cosmetic Dermatology found that heavier ingredients often lead to greasy residue, exacerbating oil buildup. -
Choosing Sulfate-Free Formulas Without Considering Cleansing Power:
Choosing sulfate-free formulas is often marketed as a gentle approach. However, these shampoos can sometimes lack effective cleansing agents. Many sulfate-free alternatives do not remove excess oil adequately. Research by the Journal of the American Academy of Dermatology highlights that individuals with oily hair benefit from effective cleaning agents like Sodium Lauryl Sulfate, which serve a critical role in degreasing. -
Over-Washing Hair Frequently:
Over-washing hair frequently is a common mistake. While it may seem that washing daily will remove excess oil, it can lead to increased oil production over time. The scalp compensates for the loss of natural oils. A study published in the International Journal of Trichology states that daily washing can disrupt the scalp microbiome and lead to oiliness. -
Ignoring pH Balance of the Shampoo:
Ignoring pH balance of the shampoo can lead to issues like scalp imbalances. Hair and scalp maintain a slightly acidic pH (around 4.5-5.5). Using shampoos with a high alkaline pH can strip natural oils and worsen oily conditions. According to a research study from the University of Connecticut, maintaining pH balance is vital for healthy hair and scalp. -
Using Products With High Alcohol Content:
Using products with high alcohol content can dry out the scalp. Many temporary relief solutions contain alcohol that may strip oils. While they can reduce oiliness, they cause the scalp to compensate by increasing oil production. The American Academy of Dermatology warns against repeated use of high-alcohol products for maintaining a healthy scalp.