Sebum production is driven primarily by hormones, but diet, climate, and topical products all play meaningful roles. If your skin or scalp feels chronically dry and tight, increasing your body’s natural oil output involves working with these factors rather than against them. Here’s what actually influences how much sebum your skin produces and what you can do about it.
Why Hormones Are the Biggest Factor
Androgens, particularly testosterone and its more potent derivative DHT, are the primary drivers of sebum synthesis. Sebaceous glands have androgen receptors on their surface, and when testosterone binds to these receptors, the glands ramp up oil production. Men have significantly higher levels of androgen receptor activity in their sebaceous glands than women, which is why men’s skin tends to be oilier.
The process works like this: an enzyme in your sebaceous glands converts testosterone into DHT, which then activates the gland to produce more lipids. Insulin-like growth factor (IGF-1) amplifies this effect. When testosterone and IGF-1 are both present, they trigger a signaling pathway that promotes lipid synthesis inside sebocytes, the cells that manufacture sebum.
Estrogen has the opposite effect. It suppresses sebum secretion, which is one reason skin often becomes drier during menopause when estrogen levels drop relative to androgens, or paradoxically drier in some people when overall hormone levels decline with age. If you suspect a hormonal imbalance is behind your dry skin, getting your hormone levels tested is the most direct path to understanding what’s happening. Testosterone replacement therapy, for instance, reliably increases skin oiliness as a side effect, particularly on the face, back, and shoulders.
How Diet Affects Sebum Output
What you eat directly supplies the raw materials your sebaceous glands use to make oil. Human sebum is composed mainly of triglycerides (40 to 60%), wax esters (19 to 26%), and squalene (11 to 15%), with smaller amounts of cholesterol. Your body synthesizes these from glucose, fatty acids, and other two-carbon building blocks pulled from your diet.
Severe calorie restriction dramatically decreases sebum production, and resuming normal eating reverses this. If you’re on a very low-calorie or very low-fat diet, that alone could explain why your skin feels dry. Studies have shown that increasing dietary fat or carbohydrate intake raises sebum output. Some dietary fats pass directly from your bloodstream into sebaceous cells without being modified at all. Linoleic acid, for example, cannot be made by your body and must come from food, yet it shows up in sebum, proving that dietary lipids integrate directly into the oil your skin produces.
Practical steps to support sebum production through diet:
- Eat enough total calories. Undereating is one of the fastest ways to shut down oil production.
- Include healthy fats daily. Olive oil, avocados, nuts, seeds, and fatty fish provide the fatty acid building blocks your sebaceous glands need.
- Don’t avoid carbohydrates entirely. Glucose is one of the substrates sebocytes use to synthesize lipids.
- Get enough linoleic acid. Sunflower seeds, walnuts, and soybean oil are rich sources of this essential fatty acid that your skin cannot produce on its own.
The Role of Vitamin A
Vitamin A has a surprisingly precise relationship with sebaceous glands. Too little vitamin A causes the glands to shrink and stop functioning properly, a finding first documented nearly a century ago. But too much active vitamin A (retinoic acid) also suppresses sebum production, which is exactly why high-dose retinoids are prescribed for severe acne.
This means your body needs vitamin A in the right amount for optimal sebaceous gland function. If you’re deficient, correcting that deficiency can restore normal oil production. Foods rich in preformed vitamin A include liver, eggs, and dairy. Beta-carotene from orange and dark green vegetables converts to vitamin A as your body needs it, making overconsumption from food sources unlikely. If you’re already getting adequate vitamin A, taking more won’t increase sebum and could actually reduce it.
Temperature and Climate Matter
Your environment has a measurable effect on how much oil your skin produces. In a controlled crossover trial, exposure to 32°C (about 90°F) significantly increased sebum secretion within 60 minutes compared to cooler conditions. Participants reported noticeably greasier skin at the higher temperature. Seasonal data confirms the pattern: sebum production and skin hydration tend to be higher in summer and lower in winter.
If you live in a cold, dry climate or spend most of your time in air-conditioned rooms, your sebaceous glands are likely producing less oil than they would otherwise. Warming your skin through warm (not scalding) showers, humidifying indoor air, and spending time in warmer environments can nudge production upward. Cold exposure, on the other hand, tends to compromise the skin barrier without boosting oil output.
Topical Oils That Mimic Sebum
While topical products don’t increase your body’s internal sebum production, they can compensate for low output by replacing what your glands aren’t making. The key is choosing oils with a chemical composition similar to natural sebum.
Jojoba oil is the closest botanical match. A synthetic jojoba sebum formulation contains roughly 25% wax monoesters, 45% triglycerides, 12% squalene, and 17% fatty acids, which mirrors human sebum’s composition remarkably well. Jojoba also contains oleic, linoleic, and arachidonic acids, all of which integrate smoothly with your skin’s existing lipid layer. Squalane (the stable, hydrogenated form of squalene) is another strong option, since squalene makes up 11 to 15% of natural sebum.
Applying these oils to slightly damp skin helps lock in moisture and creates a functional substitute for the protective lipid film that sebum normally provides. They won’t trick your glands into producing more oil, but they solve the same problem from the outside.
Habits That Suppress Sebum Production
Sometimes increasing sebum is less about adding something new and more about stopping what’s reducing it. Harsh cleansers, alcohol-based toners, and over-washing strip sebum faster than your glands can replace it. If you’re cleansing your face more than twice a day or using products that leave your skin feeling “squeaky clean,” you’re likely removing oil faster than it can accumulate on the surface.
Switching to a gentle, non-foaming cleanser and washing only once or twice daily gives your natural oil a chance to do its job. Retinoid skincare products (retinol, tretinoin, adapalene) actively suppress sebum production at the gland level, so if you’re using these for anti-aging purposes while also trying to increase oiliness, they’re working against you. The same applies to certain oral medications, including isotretinoin and some hormonal contraceptives that contain anti-androgenic progestins.
Chronic stress can also disrupt the hormonal signals that drive sebum synthesis, though the relationship is complex and varies between individuals. Prioritizing sleep, managing stress, and maintaining a consistent eating pattern all support the hormonal stability that keeps sebaceous glands functioning normally.