You train, you sleep reasonably well, you manage stress — and your energy, drive, and physique still are not where they should be. Before assuming the worst, look at your plate. Some foods that are everywhere in the modern Indonesian diet actively work against testosterone production or accelerate its conversion to estrogen. Here are the eight worth cutting back, what the evidence actually says about each, and what to eat instead.
1. Seed oils and deep-fried food
Vegetable, canola, sunflower, and soybean oils are heavy in omega-6 polyunsaturated fats. In the quantities found in a fried-food-heavy diet — and gorengan culture makes that easy here — the omega-6 load promotes chronic low-grade inflammation, including in reproductive tissue. Inflammation raises aromatase activity, the enzyme that converts testosterone into estrogen. Reused frying oil, common in street food, adds oxidised fat on top.
Swap: cook with olive oil, coconut oil, butter, or ghee, and treat deep-fried food as an occasional indulgence rather than a daily staple.
2. Ultra-processed food and added sugar
Sweetened drinks, packaged snacks, and desserts spike blood sugar and insulin repeatedly through the day. Chronically elevated insulin impairs testosterone production and pushes hormone balance toward estrogen — and the belly fat these foods build contains more aromatase, compounding the problem. Sweetened teas and coffees deserve special mention: several a day is a meaningful sugar load that most men never count.
3. Excessive alcohol
Regular heavy drinking suppresses testicular testosterone production, increases conversion to estrogen, and disrupts the brain’s hormonal signalling — a triple hit. It also wrecks the deep sleep in which most of your daily testosterone is produced. If your weekends routinely include five or more drinks, this is likely your biggest dietary lever; our article on alcohol and erectile dysfunction covers what drinking does to performance directly.
4. Soy in large, daily amounts
Soy contains phytoestrogens, plant compounds that weakly mimic estrogen. Context matters: moderate amounts of tempeh and tahu — traditional, fermented, and part of Indonesian food culture — are not a hormonal threat, and the fermentation in tempeh changes how its compounds behave. The concern is volume: soy protein shakes plus soy milk plus soy-based meals, every day. Variety is the fix, not fear.
5. Refined carbohydrates
White bread, instant noodles, and pastries behave metabolically like sugar. The occasional serving is fine; the problem is when refined carbs anchor every meal. Whole-food carbohydrates — rice in sensible portions, tubers, fruit — carry far less metabolic cost.
6. Licorice
An underappreciated one: glycyrrhizin, the active compound in real licorice, has been shown to lower testosterone and raise cortisol. It hides in some candies, herbal teas, and traditional remedies. Occasional exposure is harmless; daily habits are worth breaking.
7. Energy drinks
Coffee and tea in moderation do not harm testosterone. Energy drinks are a different product: caffeine plus a heavy sugar dose, often several cans deep into a Jakarta work night, trading away the sleep that hormone production depends on. If you need that much stimulation to function, the fatigue itself may be the symptom worth investigating.
8. Trans fats
Partially hydrogenated oils in margarine, packaged baked goods, and some fast food are associated with poorer testicular function and lower testosterone in observational research — and they are bad for the cardiovascular system testosterone depends on. There is no redeeming dose.
What to eat instead
- Fatty fish — omega-3s and vitamin D, both associated with healthier testosterone. Indonesia’s ikan kembung and tuna are affordable options.
- Eggs and red meat — cholesterol is the raw material of testosterone; zinc and B vitamins support its production.
- Cruciferous vegetables — broccoli, cabbage, and cauliflower support healthy estrogen metabolism.
- Whole-food carbs and adequate calories — chronic under-eating suppresses testosterone as reliably as junk food does.
For the full lifestyle picture — training, sleep, sunlight, and stress — see our guide to natural ways to boost testosterone.
When diet isn’t the whole story
Food moves testosterone meaningfully, but it cannot rescue a genuinely deficient level. If you clean up your diet for three months and still feel flat — low drive, poor recovery, stubborn belly fat, classic low-T symptoms — the next step is data, not more restriction. A hormone blood panel at our Jakarta or Bali clinic takes one morning. If levels are low, medically supervised TRT is the reliable fix; if they are fine, you have ruled out the expensive guess.
The bottom line
No single food kills testosterone overnight — the damage comes from patterns: daily fried food, daily sugar, weekly heavy drinking, chronic processed eating. Fix the patterns, keep the traditional whole foods, and test rather than guess if symptoms persist.