The short answer · Ketone levels
Take caprylic acid for ketone levels. This is the one to buy.

Sports Research, Organic MCT Oil, Keto C8, 16 fl oz (473 ml)
4.7· 4,325 ratings· $0.73/serving
Caprylic Acid 13.6 g — inside the studied 5-20 g window
Of 230 products scored for Ketone levels, Sports Research, Organic MCT Oil, Keto C8, 16 fl oz (473 ml) ranks #1 with a DoseRank score of 78. Caprylic Acid is the strongest evidence signal for this outcome.
Retailer links may be affiliate links. Rankings and placement are never paid.
The form“Why Caprylic Acid — not MCT Oil?”Evidence Strong evidence
Caprylic Acid is the strongest evidence signal for this outcome.
- Caprylic AcidThe pick
Strong evidence · 13.6 g
An 8-carbon medium-chain fatty acid (C8) from coconut or palm kernel oil; the most ketogenic MCT fraction, rapidly converted to ketones for energy.
- MCT Oil
Strong evidence · 14 g
Concentrated medium-chain triglycerides (C8/C10) from coconut or palm; rapidly converted to ketones for quick energy, unlike slower long-chain fats.
The dose“Is the dose actually effective?”Dose fit 80
Caprylic Acid at 13.6 g lands inside the studied 5-20 g window.
Caprylic Acid
Studied window 5-20 g · this pick 13.6 g
The ranking“Why should I trust this pick?”Trust 91
Strong trust signals — consistently high marks from verified buyer ratings. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.
- 230 products scored
- Never paid placement
- Evidence level: Strong · 92
- 70 brands
- 2 ingredients
The price“Can I do better than $0.73 a serving?”Value 46
$0.73 per serving — high price tier for this outcome. The cheapest ranked pick here is $0.35 per serving.
- 9NOW Foods, Sports, MCT Oil, Unflavored, 32 fl oz (946 ml)Score 54 · $0.35/servingiHerb
- 10NOW Foods, Sports, MCT Oil, Unflavored, 16 fl oz (473 ml)Score 54 · $0.45/servingiHerb
Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.
Ready?
The #1 pick is $0.73 a serving.Sports Research, Organic MCT Oil, Keto C8, 16 fl oz (473 ml) — in stock at a tracked retailer.
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Sports Research, Organic MCT Oil, Keto C8, 16 fl oz (473 ml) ranks #1 for Ketone levels with a DoseRank score of 78. The score blends clinical strength, evidence, dose fit, trust signals and value across 230 products scored for this outcome.
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